ML20090L749
| ML20090L749 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 05/04/1984 |
| From: | BECHTEL GROUP, INC. |
| To: | |
| Shared Package | |
| ML17198A223 | List:
|
| References | |
| CON-BOX-04, CON-BOX-4, FOIA-84-96 7220-C-230(Q), NUDOCS 8405260044 | |
| Download: ML20090L749 (37) | |
Text
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t 7220-C-23d4) b Rev. 11 TABLE OF CONTENTS
.i TECHNICAL SPECIFICATIONS FOR SUBCONTRACT FOR OPERATING ON-SITE BATCH PLANT AND FURNISHING CONCRETE
,FOR THE CONSUMERS POWER COMPANY MIDLAND PLANT i
MIDLAND, MICHICAN SECTION TITLE PACE 1.0 WORK INCLUDED
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1 2.0 RELATED WORK NOT INCLUDED 1
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3.0 ABBREVIATIONS 2
4.0 CODES AND STANDARDS 2
5.0 BATCH PLANT LOCATION 2
6.0 QUALITY ASSURANCE PROVISIONS 2
7.0 MATERIALS 3
7.1 Cement 3
7.2 Aggregate 3
7.3 Water and Ice 4
7.4 Admixtures 5
8405260044 040517 Ap PDR FOIA RICE 84-96 PDR A
7220-C-230(g)
Rev. 11
/
,SECTION TITLE PAGE 7.5 Mortar Sand 5
7.6 Non-Shrink Grout 6
7.7 Hydrated Lime 6
7.8 Mineral oxide Coloring 6
8.0 STORAGE OP MATERIALS 6
8.1 Cement, Pozzolan and Lime 6
j 8.2 Aggregate 7
8.3 Admixtures 7
9.0 CONCRETE 7
i 9.1 Concrete Quality 7
9.2 Measuring, Batching, Mixing and Delivering 10 9.3 Colored concrete 12 10.0 NON-SHRINK GROUT AND DRYPACK MORTAR 12 10.1 General 12 10.2 Non-Shrink Grout 12 10.3 Masonry Mortar 12 l
10.4 Drypack Mortar 13 i
11.0 COIR AND HOT WEATHER CONCRETING 13 l
i 11.1 Cold Weather Concreting 13 1
l 11.2 Hot Weather Concreting 14
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12.0 SAMPLES AND TESTS 15 1
l 12.1 General 15 12.2 Testing of Materials 15 b
12.3 Concrete and Grout Testing 17 l
12.4 Test Results 17 2m
l 7220-C-230 (Q)
Rev.13 d
,SECTION
, TITLE PAGE 18 13.0 INSPECTION 11.1 General 18 13.2 Batch Plant Inspection 18 14.0 MEASURIMENT AND FAYMENT 19 14.1 on-Site Batch Plant 19 14.2 Mobilizat(on Fee 19 14.3 MaterialStockPiledbn-Site 19 4
14.4 Concrete and Grout 19 14.5 Cement 20 14.6 Admixtures 20 14.7 Heating and Cooling 20 14.8 Non-Shrink Grout and Mortars 21 14.9 overtime 21 APPENDICES A
TECHNICAL SPECIFICATIONS 7220-C-208 FOR SUBCONTRACT FOR MATERIALS TESTING SERVICES (Without Appendices), Latest Revision l
.4 B
FORM QC-2C, CONCREIE MIXER REPORT i
C SPECIFICATION 7220-G-22, QUALITY ASSURANCE REQUIREMENTS, Rev. 1 D
FORM G-321-D, DRAWING AND DATA REQUIREMENT, Rev. 1 l
E APPROXIMATE CONCRETE MIX DESIGN 3, Rev. 0,
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7220-C-230(q)d Rev. 11. '..
v-i TECHNICAL SPECIFICATIONS FOR SUBCONTRACT FOR OPERATING ON-SITE BATCH PLANT AND FURNISHING CONCRETE i
1.0 WORK INCLUDED Tha work includes but is not limited to the following:
i s.
Testing, maintaining, and operating on the jobsite the necessary plant and equipment for the batching, mixing, and delivering of Portland cement concrete.
l b.
Furnishing cement, aggregates, and all other materials herein specified for the production of concrete.
l c.
Storage and protection of materials.
d.
Demobilization and removal from the jobsite of plant, equipment and materials at completion of the work.
i 2.0 REIATED WORK NOT INCLUDED l
The following items of related work are not included:
I a.
Samplinp;and testing of concrete and materials, except as specified j
herein.
j b.
Forming, placing, finishing and curing of the concrete.
c.
Placing of non-shrink grout, masonry sortar and drypack nortar.
1 l
f d.
Furnishing, fabricating and placing of reinforcement.
e.
Furnishing of construction water.
f.
Design of concrete mixes.
i 3
Providing electrical service to batch plant switch terminal and furnishing of elsetric power to operate batching plant.
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.7220-C-230(g) 4 Rev.'11 l
I 3.0 AB8REVIATIONS s
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The abbreviations listed below, where used in these Specifications shall have the following meanings:
- American Concrete Institute i
- American Society for Testing and Materials l
AASHO - American Association of State Highway Officials NRMCA - National Ready Mixed Concrete Association i
4.0 CODES AND STANDARDS Materials, procedures and the furnished concrete, unless otherwise specified herein, shall conform to the " Standard Specification for Ready Mixed Concreta" (ASTN C94-72), the " Building Code Requirements for i Rainforced Concreta" (ACI Standard 318-71), the " Standard Specifiestions ~-
i for Structural Cancrete for Buildings" (ACI Standard 301-72), the "Reconnended Practice for Measuring, Mixing. Transporting and Placing Concrete" (ACI
, Standard 304-73), the ACI Manual of Concrete Inspection (SP-2, 1967), and i
.other codes and standards specified herein.
j 5.0 BATCH PLANT LOCATION i
j The batch plant is located as shown on the reference drawings.
6.0 QUALITY ASSURANCE PROVISIONS i
I 6.1 A Quality Assurance Program covering all phases of concrete I
production shall be established and implemented by the Subcontractor.
The program shall be in accordance with Appendix C and include procedures which will assure quality production of concrete, and documentation procedures that will verify that all materials and l
procedures used in the work comply.with these specifications.
j 6.2 The Contractor shall have free access to all work and shall have l
authority to stop or reject work if the specification requirements, j
including those for documentation, have~not been fulfilled.
6.3 Documentation required in Appendix C shall be furnished by the Subcontractor to the Contractor and be retained by the Contractor for inclusion in the Quality Assurance files.
6.4 Additional documentation relating to concrete quality that may be 1
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originated by the Subcontractor shall be retained by the Subcontractor and made available at the option of the Contractor for inclusion in the Quality Assurance files.
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t 7220-C-23 R:v.15,.
- 7.0 MATERIALS i.
Materials furnished by the Subcontractor shall conform to the follod[ng specifications.
7.1 Cement 1
Cement shall be Portlan4 cement, Type II conforming to the Specification for PortlandCement (ASTM C150-72). For Type II cement, the sum of tricalcium silicate and tricalcium aluminate shall not exceed 58%
and the cement shall not contain more than 1.00% by weight of alkalies calculated as NA 0 plus 0.658 K 0.
When applicable Type 2
2 I cement, conforming to MTM C150-78a, may be used.
Only one brand of cement shall be used for all work, unless specifically authorized by the contractor. The temperature of cement at the time of delivery 1
shall not be greater than 150F unless otherwise approved by the Engineer.
7.2 Aggregate 7.2.1 General All aggregates shall conform to the " Standard Specifications for Concrete Aggregate" (ASIM C33-71a), unless herein' specified otherwise.
Fine aggregate shall consist of clean, sharp, washed natural or washed crushed sand of uniform gradation when delivered to batch plant storage. Coarse aggregate shall consist of i
washed gravel or washed crushed rock having hard, strong, durable pieces, free from adherent coatings when delivered to batch plant storage.
7.2.2 Cradation Fine and coarse aggregate shall meet the following grading requirements:
Steve Size Percentage Passing U.S. Std.
Fine Agg.
Coarse Aggregates Sq. Mesh (gand) 3/8 3/4 1-1/2 3 in.
4 i
4 inch 100 3 inch 90-100 2 inch 100 35-55 1-1/2 inch 90-100 0-15 1 inch 100 20-55 0-5 3/4 inch 90-100 0-15 3/8 inch 100 85-100 20-55 0-5 l
No. 4 95-100 10-30 0-10 No. 8 80-100 0-10 0-5 No. 16 50-85 0-5 l
No. 30 25-60
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No. 50 10-30 No. 100 2-10 t
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The minimum percentage shown for sand material passing the No. 50 and No.100 sieves may be reduced to 5 and 0, respectively, p,roviding at least one of the conditions stated in paragraph 3.2 of ASTM C33 is met.
In additiion to the specified gradation, the fine aggregate (sand) shall have a fineness modulus of not less than 2.5 nor more than 3.0 during normal operations, and at least 4 of 5 successive test samples shall vary not more than 0.20 from the average.
The particle shape of the coarse aggregate shall generally be rounded or cubical and not contain flat and j
elongated particles in excess of 15 percent by weight in any nominal size group.
Tests for and definitions of thin, flat and alongat~ed particias shall be'in accordance with Technical O
Specifications 7220-C-208.
In the case of crushed aggregates, when the material finer than the No. 200 sieve consists of the dust of fracture, essentially free of clay or shale, the percentage of ma-terial passing the No. 200 sieve is restricted to 2.5.
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732.3 Source of Aggregate
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The Subcontractor shall obtain aggregates from one of the sources listed below or other approved sources. The source selected shall not be changed unless approved.
Inland Line and Stone Co., Manistique, Michigan a.
s, b.
Drususond Dolomite, Inc., Drtausend Island, Michigan George Hubscher and Sons, Mt. Pleasant, Michigan c.
I d.
Kussa Pit, Juniata, Michigan j
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J. P. Burrou hs a d
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1 Bersey,Mich!gank3/!ons Inc A
inchagg.-HerseyPftat
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regate only I
7.3 Water and Ice i
Water and ice furnished by the Subcontractor for use in mixing concrete shall be free of injurious amounts of oil, acid, alkali, organic matter and other deleterious substances. Water shall be initially qualified and will be tested for chlorides, com-pressive strength, soundness and time of setting at the frequency specified in Specification 7220-C-208. Table 1.
The water shall not contain more than 250 parts per million of chlorides f
4
7220-C-230(Q)
Rev. 13 as C1'.
Water from the existing'well will be' tested by the Contractor to determine the effects of the mixing water compared with distilled water. The acceptance criteria for compressive strength, soundness and time of setting shall be as follows:
Requirement and Test Method Acceptance Criteria Compressive strength, ASTM C109 Reduction in strength not j
in, excess of 10 percent Soundness, ASTM C151 Increase in length limited to 0.10 percent Time of setting, ASTM C191(1) 110 min for initial set, kl 11 hr for final set (1)After allowing specimen to remain undisturbed for 30 min.
after molding as specified in ASTM C191 Section 5.2, the penetration of the 1 set needle shall be determined every 10 minutes thereafter.
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7220-C-230 (q) g I*
II 7.4 Admixtures
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concrete shall contain a postolan, an air entraining agent and j
a water reducing agent unless noted otherwise on the drawings.
I No other admixtures shall be used unless authorized. When i
available, admixtures shall be purchased and stored in liquid solution. The manufacturer or shipper of admixtures shall submit l
an i rared spectyophotometry analysis on each shioment for reviev by t e Contractor a field engineering personnel. A certification i
of conformance shall.also.be furnished with delivery.
7.4.1 Possplans
.l Possolans shall conform to " Standard Specification for Fly Ash and Raw or Calcined Natural Possolans for use in f
Portland. Cement Concrete" (ASTM C618-72).
l All postolans shall be sampled and tested in accordance with " Methods of Sampling and Testing Fly Ash" -(ASTM C311-
)
68). Approximately 15 percent by weight of possolan will be used to replace cement in the mixes. The subcontractor shall submit Jocuments certifying that the pozzolan to be furnished complies with these Specifications. The cement 4
i shall not be replaced by postolan if the possolan fails to l
comply with ASTM C618-72.
i Non possolan mixes may be substituted for mixes containing l
possolans provided the quantity of the placement does not h
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exceed 3 cubic yards and required strength f'c does not exceed 5,000 psi.
7.4.2 Air Entraining Agent 1
1 Air entraining agents shall conform to " Specification for Air Entraining Admixtures for Concrete" (ASTM C260-69),
l capable of entraining 2-6 percent air.
h Manufacturer's certification shall be submitted stating that the air entraining agent conforms with ASTM C260-69
.l 1s tapable of entraining 2-6 percent air.
b ',
The Subcontractor shall specify by name, in his proposal, the air entraining agent he proposes to use.
7.4.3 Water Reducing Agent Water reducing and retarding agent shall conform to the j
" Standard Specification for Chemical Admixtures for Concrete" (ASTM C494-71) Type A or Type D.
A Manufacturer's certification shall be submitted stating that the water reducing agent conforms with ASTM i
C494-71, Type A or Type D, as applicable. Tests as speci-fied for Type A or D in Sections 1, 2, 3, 4.1, 4.3, 5, 6, 7 and 9.3 shall apply.
l During the time of year that the average ambient air temp-i erature for the daylight period is above 70*F,' Type D
'shall be used; except that for floor slabs 21/2 feet or
(
lesa in thickness Type A may be used regardless of ambient temperature. When the average ambient air temperature for the daylight period is 70*F or below, either Type A or l
Type D may be used.
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The subcontractor shall specify by name, in his proposal, the water reducing agents he proposes to use.
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7.5 : Mortar Sand l
Mortar Sand shall conform to ASTM C-144-70 or ASTM-C-33-71a,
with 100% passing No. 4 sieve.
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7.6 Non-Shrink Grout I
4 Non-shrink grout shall be either of the following or equal.
j 7.6.1 Embecco "636" as manufactured by Master Builders Co.
(premixed).
7.6.2 Embecco "713" as manufactured by Master Builders Co.
i (premixed) 7.6.3 Intraplast "N" as manufactured by Sika Chemical Corp.
i (Additive).
1 I
7.6.4 Five Star Grout as manufactured by U. S. Grout Corp.
l (premixed).
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i 7.6.5 Masterflow "LL612" as manufactured by Master Builders j
Co. (Additive) 7.6.6 Sauereisen "F-100" as manufactured by Sauereisen Cements i
Co. (premixed) i 7.6.7 Saueriesen No. 72 "Special Casting Grade" as manufactured l
by Saueriesen Cements Co. (premixed) (to be used only when
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j specifically noted on the design drawings)
I i
The nodskrink grout may be furnished by the Contractor, at his option.
7.7 Hydrated Line 1
Hydrated line for masonry mortar shall conform to the " Standard l
Specifications for Hydrated Line for Masonry Purposes", Type "S",
i I
(ASTM C207-49) (1968).
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7.8 Mineral oxide coloring Mineral oxide coloring for concrete shall be Sonobrite as manu-factured by Sonneborn Building Products. Inc., or Permatint Fi pent qs asnufactured by Conrad Sovig Co. Inc., or equal.
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8.0 STORAGE OF MATERIALS F
Storage and handling of materials shall comply with these Specifications applicable referenced ASTM Specifications, the ACI Manual of Concrete e
Inspection (SP-2,1967), ACI 304-73, and ACI 301-72.
J i
8.1 Cement, Fossolan and Line d
Cement, possolan, and line shall be stored in a dry, weather-tight i
properly ventilated structure with adequate provision for preven-tion of moisture absorption. Bins shall be constructed so as to avoid dead storage. When sacked cement is used, it shall not be stacked higher than 14 sacks for storage periods of not more than 30 ealendar days nor higher than 7 sacks for longer periods. Cement and possolan shall,be stored at the batch plant in sufficient quanti- $,
ties to permit continuous placaent for any sine placement undertakee y,
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7220-C-230 (Q)
Rev.12 k
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8.2 Aggregate t
, Aggregate shall be stored and maintained in such a manner as to I
avoid the inclusion of any foreign materials in the concrete.
No muddy or oil leaking traction equipment shall be allowed to operate on the storage piles. The placing of the material in storage and its removal therefrom shall be done in auch a manner as to maintain the uniformity of the grading. All fine aggregate (sand).shall have a uniform and stable moisture content of not more than 7 percent by weight (even dry weight basis) when delivered to the batching plant bins. The stockpiles at the point of supply shall be provided with suitable drainage facilities arranged in such a manner as to give a minimum of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> drainage l
prior to use of the aggregate. Aggregate shall be stockpiled at the batch plant site before the start of concrete operations in a i
sufficient quantity to permit continuous placement of concrete.
f Fine and coarse aggregate storage piles shall be built and main-tained to prevent segregation and excessive breakage. Suitable l
bulkheads or space shall be provided between specific size groups l
'of aggregate to preclude mixing of the different size groups. The bottom of storage areas intended to be used as the primary or ac-tive storage (these are the areas from which the aggregate bins h li will normally be charged) shall be paved with concrete within 90 4./ \\ '
days after the contract award. Any additional seccadary storaze F
areas which may later become necessary shall be as directed or approved by the Contractor, to assure that the requirements of this section are met.
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8.3 Admixtures Admixtures which are kept in their original containers shall be
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stored in such a manner as to prevent damage. Dry admixtures delivered in bulk shall be stored in approved tanks or silos at the site. Liquid admixtures, delivered in tank cars or tank trailers, shall be stored in tanks approved for storage at the site. squipment for agitation of admixture shall be provided if recommended by the admixture manufacturer.
9.0 CONCRETE 9.1 Concrete quality 9.1.1 General Portland cement concrete shall conform to " Standard l
Specification for Ready-Mixed Concreta" (ASTM C94-72) and " specifications for Structural Concrete for Buildings" (ACI Standard 301-72) unless otherwise specifibd. The basis for determining the proportions 3
of the cowerete shall be Alternative No. 1 ASTM C94-72, except in lieu of paragraph 4.2.1(2) the concrete shall he mixed so as to be placed at slumps specified in Sections
[
9.1.2 and 9.1.3 herein.
I l
9.1.2 Classification Concrete shall meet the following requirements unless d,
shown otherwise on the drawings or as approved by 7
Project gngineerin6 d
7
TABLE 9.1 CONCRETE CLASSIFICATI0It TABL3 Slump 90 Day Working Strength Limit Maximsa (psi) U0111 at Point of Inadvertency Rejection Aggregate i
IClass f'c Placement (in.)
Margin (in.)
Limit (in.)
Size (in.)
Use and Location A-1 2,000 4
1 5'
3/4 Electrical duct e concretebackfillpasementandlean 1
2 A
A-2 2,000 4
1 5
1-1/2 Leanconcretebackfg11 m3 A-Groot 2,000 No. 4 Construction joints 3-1 3,000 3
2 5
3/4 Structural concrete walls and slabs l
3 12 inches thick or less and congested l
reinforcing areas; elect. duct encasement i
B-2 3,000' 3
2 5
1-1/2 Foundation and walls more than 12 inches thick including turbine pedeetal concrete l
3-starter 3,000 5
1 6
3/4 Starter six Q
3-Crout 3,000 No. 4 Construction joints C-1 4,000 3
2 5
3/4 Walls and slabs 12 inches thick or less i
and congested reinforcing areas i
C-2 4,000 3
2 5
1-1/2 Foundations and walls more than 12 inches thick k
C-Starter 4,000 5
'l 6
3/4 Starter six i
C-Crout 4,000 No. 4 Construction joints D-1 5,000
'3 2
i i
5 3/4 Walls and slabs 12 inches thick or i
less and congested reinforcing areas F2 5,000 3\\
2 5
1-1/2 Foundations and walls more than 12 f
inches thick k
B-starter
'5,000 5
1 6
3/4
' Starter six
. D-creet 5,000 No. 4 construction joints E-1 6,000 3
2 5
3/4 Reactor Bids. walls and done in congested I
reinforcing areas E-2 6,000 3
2 5
1-1/2 Reactor B1dg. valls and done
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E-starter - 6,000 5
1 6
3/4 Starter six d Y5 l
F-Crout 6,000 No. 4 Construction joints
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Dry Pack 4,000 0
No. 4 As directed w
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TABLE 9.1 (contissed)
Slump 90 Day Working Strength Limit (psi) UONI Maximum at Point of Inadvertency Rejection Aggregate IClass f'c Placement (in.)
Martin (in.)
Limit (in.)_
Size (in.)
Use and location Tramie conc. 4,000 6-8 3/4 As directed FG-A 2.000 5
1 6
3/8 I"*" *"***"*
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duct encasement and where noted
,ce drawings.
PG-B 3,000
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6 3/8
' Lean concrete backfill. electrical t duct encasement. equipment pads, temporary construction blackout pourbacks. concrete repairs. core (.
'wythe spaces in block walls.and
!O where noted on drawings.
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4,000 5
1 6
3/8 Interior structural concrete in areas of extreme congestion.
(
equipment pads, temporary construction blockout pourbacks, concrete repairs and where l
noted on drawings PG-3 5,000 5
1 6
3/8 structural concrete in areas of extreme congestion, equipment pads, temporary construction blockout pourbecks, concrete repairs, and where noted on Drawings.
fi 7 alterestive to D-1 mix for poured block walls.
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TABLE 9.1 (continued) i Slump 90 Day Working Strength Limit (psi) U0181 Maximum at Point of Inadvertency Rejection Aggregate IClass f'c Placement (in.)
Martin (in.)
Limit (in.)
Size (in.)
Use and location PG-E 6,000 5
1 6
3/8 Structural concrete in areas b
of extreme congestioq, equip-ment pads, temporary con-
[
struction blockout pourbacks.
concrete repairs, and where A g noted on drawings, except PG-Groot 6,000 ll.& l contai m t exterior.
No. 4 Construction joints E
1 The class designation shown indicates mixes which contain flyash.
A class designation may be altered by the addition of the letter 'C' to indicate a mix which contains no flyash (i.e., A-1 becomes A-1-C or D-Crout becomes DC-Crout, etc).
s Mixes ubich contain flyash shall not be used in the construction of the counting roo a oratories.
blesswheresEtoemformtoq.istityassurancerequirenents.ifically referenced, these class are not requir
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7220-C-230(q) g Rev. 11
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w 9.1.3 Slump
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The ' Working Limit" as specified in Table 9.1, will be the basis for evaluating concrete consistency at the point of placement. The " Inadvertency Margin" is the allowable deviation from the 'Vorking Limit" for occa-sional batches of concrete, provided such batches can be properly placed and consolidated. Concrete consistency b
shall be uniform from batch to batch. Batches of con-crete with slumps in the " Inadvertency Margin" will be
,' s rejected after the Subcontractor has been instructed by the Contractor to bring the slump within the " Working Limit".
~~
The amount of water added at the batch plant shall be in accordance with the mix design furnished by the Contractor, except that the Subcontractor shall be responsible for s
adjusting the amount of water to account for variations in the moisture content in the aggregates. The Contractor shall be notified Uf such changes and accurate records of such adjustments' maintained.
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Concrete, that has been, rejected for failure to meet slump limit (shall not be salvaged for use in the work; increased 7~
mixing time, ' addition of dry materials, or similar modifi-cation of a rejdeted batch for the purpose of conforming to., s1L,rp ~ limits shall not be permitted.
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fSlump'aeasurementsshallbemadeasspecifiedin Spe'cification.7220-C-208.
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[ctartermixeni.inlieuofmortarmaybdusedonconstruc-
, tion joints 'ar.d shall have a slump working limit of 5 inches g
- with a' rejection limit of 6 inches. ~ Starter mix slumps will jnotbeincludedwiththeslumps.oftheconcreteplacement.
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I, 7220-C-230(Q)
Rev. 12 9.1.4 Grout All grout shall be proportioned and mixed as directed or other-wise approved.
Standard grout for bond at construction joints shall have, as a minimum, the same cement-sand ratio as the concrete with which it is to be used. Mortars of higher cement-sand ratios approved by Project Engineering may be used.
9.1.5 Air Content Where air entrainment is required, it shall be the subcontractor's responsibility that the total air content of the concreto, as measured at the point of placement, shall not be less than 3 percent nor more than 6 percent of the concrete by volume with the following exceptions:
For interior valls and slabs, the total air content of the a.
concrete at the point of placement may be reduced to 2 percent.
b.
All concrete except that used for the containment exterior sLL11 meet the requirements of 9.1.5 with an inadvertancy p
margin of 1, percent above or below specified limits for occasional batches provided prompt corrective action is taken to bring the air content within limits.
However, in no case shall the air content fall below 2 percent.
Concrete mixes containing pozzolans which will not be c.
permanently exposed and which will not be subject to freezing temperatures while wet may be placed with an air content less than the specified minimum if approved by the Field Engineer.
9.1.6 Mix Design
~ ~ ~ ~
The Contractor will furnish the Subcontractor with mix designs one month prior to the manufacture of concrete.
Furnishing mix design shall not relieve the Subcontractor of his responsibility for compliance with the provisions of these specifications.
Where necessary, the Contractor will increase or decrease cement factor 9 as deemed necessary for design mixes.
No gap graded concrete will be allowed.
Concrete mixes shall contain all aggregate size groups up to and including the maximum size to be used in the concrete.
9.2 Measuring, Batching, Mixing, and Delivering 9.2.1 Ceneral The measuring of materials, batching, mixing, and delivery of all concrete shall conform to " Standard Specification for Ready-Mixed Concrete" (ASTM C94-72), ACI 304 and NRMCA Concrete Plant Standard and Truck Mixer and Agitator Standard unless otherwise specified.
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10
g 7220-C-230(Q)
Rev. 15 l/!
9.2.2 Hessurement The measurement of all solid materials shall be by i
4 weight. Water and liquid admixtures shall be measured by weight or volume. Ice may be measured by weighing on platform scales, provided it is immediately placed in the chipper and then blown directly into the central mixer or onto the central sizer charging belt (or truck mixer, if applicable).
The design water cement ratio of the mix may be exceeded, provided the batch weights are within the tolerances allowed by ASTM C 94.
9.2.3 Batching Batching shall be performed by either a central e
batch plant or, at the option of the Contractor, by a dry six batch plant. When batching is performed by a central batch plant, Sections 9.2.3.a and 9.2.3.c shall apply. When batching is performed by i
a dry mix batch plant, Sections 9.2.3.b and 9.2.3.c shall apply, i
a.
Central Batch Plant The Contractor will furnish, for purchase by 2
the Subcontractor, an existing onsite batch plant. The Contractor, before turning the batch plant over to the Subcontractor, shall make all necessary improvements and modifica-tions to the batch plant to provide a modern, s
dependable automatic batch plant to accurately i
determine and control the specified quantities of the various materials entering the concrete.
1 Prior to turning the batch plant over to the Subcontractor, the Contractor, at its expense, shall have the plant certified in accordance with standards established by the NRMCA and the scales tested and sealed by the Bureau of 4
Weights and Measures or a qualified independent agency or testing laboratory.
The agency will
~
certify the scale and metering tests in the state in which it is to be used.
1 Plantandequipmentshallbecag/hranda able of a continuous production of 150 yd 3
maxispa rate of 200 yd /hr. Furthermore, the 1
plant shall be capable of batching six pre-viously set mixes, or shall have 's digital adx selector.
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7220-C-230(Q)
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Dry Mix Batch Plant The Subcontractor shall furnish, at its expense, a modern dry six batch plant. The Subcontractor, at its expense,'shall test the mixer trucks in acco:: dance with Appendix XI, ASTM C 94 to ensure that they will produce concrete meeting these uniformity requirements.
Furthermore, the dry batch plant and mixer trucks must be certified in accordance with the NRCMA's Certification of Ready Mixed Concrete Production Facilities. The documentation for both of these tasks should be complete prior to start of concrete production. The planc and equipment shallg/hrandamaximumrateof e capable of a continuous oducg/hr.
ion of 90 yd 0 yd Furthermore, the plant shall be capable of batching four previously set. mixes, or shall have a digital mix selector.
Central Batch Plant and Dry Mix Batch Plant c.
The batch plant shall be inspected every 6 months in accordance with ASTM C 94 and at the Subcontractor's expense. Test certificates and the test reports showing errors found shall be submitted to the Contractor at the completion
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of each test. Such means and equipment and its operation at 'all times shall be subject to the approval of the Contractor.
The batch plant shall be capable of ready adjustment to compensate for the varying mois-ture contents of the aggregates and to change the weights of the materials being batched.
Adjustments to the mix may be made based on a moisture content determined by ASTM C 70. ' An accurate recorder batch counter shall be -
provided. The recorder shall be digital, pro-ducing'on a trip ticket supplied by Subcontractor the individual names, weights, or volumes of all materials in the batch (except for ice, which may be recorded on the ticket by hand),
the class of cencrete, the batch number, the mixer number (if more than one mixer), batch 3
volume (yd ), and date and time the mix is discharged. Space shall be provided on the trip. ticket for the truck number, time of final discharge from the truck, and signature for receipt of_ concrete at point of truck dis-charge. In the event of a digital recorder failure, the Subcontractor may provide hand-written trip tickets. The recorder shall be i
.ept.iad or replaced within 30 dayc, unless approved otherwise by project engineeri.ng.
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1 7220-C-230(Q)
Rev. 15 l/
9.2.4 Mixing and Delivery Concrete shall be mixed by either a central batch plant or, at the option of the Contractor, by agitator mixer trucks. When concrete is mixed by a central batch plant, Sections 9.2.4.a and 9.2.4.c shall apply. When concrete is mixed by agitator mixer trucks. Sections 9.2.4.b and 9.2.4.c shall apply.
a.
Central Concrete Batch Plant Concrete shall be mixed completely in station-ary mixers at the onsite plant and transported to the point of delivery in agitator mixer trucks. The stationary mixer shall contain a consistency meter to control slump. A water jogging switch shall be available at the batcher console for adjusting slump. Accurate records shall be made of water added to each batch with the water jogging switch.
b.
Dry Mix Batch Plant Concrete shall be mixed and delivered to the point designated by the Contractor according to the truck-mixed concrete method.
Truck-mixed concrete shall consist of concrete that is completely mixed in a truck mixer (70 to 100 revolutions) at the mixing speed designated by the manufacturer to produce the uniformity of concrete indicated in Appendix XI of ASTM C 94.
Concrete uniformity tests shall be made in accordance with Section 10.5.1 of ASTM C 94 and, if requirements for uniformity of concrete indicated in Appendix XI are not met with 100 revolutions of mixing after all ingredients, including water, are in the drum, that mixer shall not be used until the condition is cor-rected, except as provided in Section 9.5 of ASTM C 94. When satisfactory performance is found in one truck mixer, the performance of mixers of substantially the same design and condition of blades say be regarded as satis-factory.
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7220-C-230(Q)
Rev. 15 lf When a truck mixer is approved for mixing and delivery of concrete, no water from the truck water syctem or elsewhere shall be added after the initial introduction of the mixing water for the batch. Discharge of the concrete shall be completed within 1-1/2 hours, or before the drum has revolved 300 revolutions, whichever comes first, after the introduction of the mixing water to the cement and aggregate.
These limitations may be waived by the field engineer if the concrete is of such slump that it can be resdily placed.
Truck mixers shall operate within the limits of capacity and the speed of rotation designated by the manufacturer of the equipment. Additional revolutions of the mixer beyond the number 3
found to produce the required uniformity of
.i concrete shall be at the designated agitating speed.
Central Batc.h Plant or Dry Mix Batch Plant
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c.
The Subcontractor shall arrange routing so that placement of various classes of concrete can be made simultaneously. At such times, the Sub-contractor shall ensure that changes in batch-ing are correctly made and that each class of concrete is delivered to the proper destination.
The Contractor shall furnish, for purchase by
'the Subcontractor, eight agitator trucks.
The agitator trucks shall be maintained by the Subcontractor at its expense to properly discharge the specified low slump, large aggregate concrete. For all major placements, backup trucks shall be provided by the Subcontractor at its expense.
For dry batching concrete, the mixer trucks shall be as indicated in Sections 9.2.3.b and 9.2.4.b.
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7220-C-230(Q)
Rsv. 15 lf 9.3 Colored concrete Concrete furnished for encasement of underground electrical conduit (external to the building perimeters) shall be colored with oxide coloring as directed by the Contractor.
c 10.0 NONSHRINK GROUT AND DRYPACK MORTAR 10.1GenerC.
Materials for nonshrink grout and mortars shall generally be provided by the Subcontractor for mixing and placing by others.
Bowever, when large quantities are involved, the Subcontractor may be required to furnish mixed nonshrink grout or mortars.
10.2 Nonshrink Grout Monshrink grout shall be proportioned and mixed in accordance with the manufacturer's instructions.
Prior to use, a test batch shall be made and submitted to the contractor for testing to determine the percent of expansion and the compressive strength of the grout.
10.3 Masonry Motar 4
Masonry mortar shall be proportioned by volume as follows:
1 part Portland cement 1/4 part hydrated lime 4
3 parts of motor sand D
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I 7220-C-230 (Q) nav. 11 10.4 Drypack Mortar Drypack nortar'shall be proportioned by volume as follows:
1 part Portland cement (White cement shall be substituted for the regular cement as required to match adjacent color) to 2-1/2 parts of a well graded concrete sand conformin ASTM C-144-70 or ASTM C-33-71a with 100% passing No.g with n
4 sieve.
Only enough water shall be used to produce a mortar, which when used, shall stick together on being molded into a ball by a l
alight pressure of the hands, and shall not exude water, but will leave the hands damp. The proper amount of mixing water and the proper consistency shall be that which produce a mortar j
which is of the point of becoming rubbery when the material is solidly packed.
'11.0 COLD AND HOT WEATHER CONCRETING Methods and means of batching, mixing and delivering of concrete in cold and hot weather shall comply with the " Recommended Practice for l
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Cold Weather Concreting" (ACI Standard 306-66) and the " Recommended Practice for Hot Weather Concreting" (ACI 305-72) and as specified i
herein or otherwise directed. The S.ibcontractor shall submit proposed procedures for approval by the Contts tor.
11.1 Cold Weather Concreting A boiler plant will be provided, as part of the Contractor l
furnished batch plant, for heating the water and the aggregate, during the placing of concrete in cold weather.
n.
2 Concrete, when deposited in the forms during cold weather, shall have a temperature within plus or minus 10*F of the following:
Ambient Thin Sections Mass Concrete Mass concrete Air Temp.
Less than 2-1/2 ft.
2-1/2 ft. or More Using Mix Design Deg. F In Least Dimension In Least Dimension Without Flyash (w/ or w/o Flyash)
(w/ Flyash) 31F to 45F 60F SOF 50F i
0F to 30F 60F 55F 50F Below 0F 70F.
60F 50F During cold weather concreting when the ambient air temperature l
occasionally rises above 45'F, the temperature requirements of this section will apply, but the criteria for rejection due to I
high temperatures shall be the requirements given in Section 11.2 for Thin and Thick sections.
In the event of concurrent pours including both thin and massive concrete sections, the temperature of the concrete batched shall' comply with the temperature requirements for the thickest section i
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poured. Adequate weather protection must be provided, particu-larly for the thin sections, to preclude weather damage to this concrete.
2 The Subcontractor shall preheat the mixing water and aggregate as required to assure heated materials are available when needed.
The use of heated materials will not be permitted until the temperature of the concrete has decreased to the temperatures ld 1-in the table above. The materials shall be free of ice, snow and frozen lumps before they suter the mixer. All methods and equipment shall be subject to approval by the Contractor.
j 11.2 Hot Weather Concreting i
During warm weather, the Subcontractor shall, at his expense,
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and before ice is added, employ approved-means and measures i
for reducing the temperature of the concrete, such as: (1)
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cooling the aggregate; (2) shading materials and facilities i
from the direct rays of the sun; (3) insulating water supply l
lines; or (4) spraying the mixing drum and truck drums.
i j When the use of ice is contemplated as a hot weather concreting i
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measure and such temperatures are imminent, the Subcontractor shall provide ice storage and facilities for weighing, chipping, and mixer charging on a " ready-to-go" basis.
Flaked or chipped ice shall be substituted, as necessary, for up to 100 percent of added mixing water to obtain the following placing temperatures:
- - - - - - - - - ~.
Thin Sections Thick Sections Mass Sections 3 ft. and less
'more than 3 ft.~ ~ ~ ] More than 6 ft.
In Least Dimension
_to,6.ft. _.
..'In Least Dimension In Least Dimension 85'F max.
As near 50*F 75'F max. (A) as possible but j.
not to, exceed 70',Tg (E)
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l (A) For Thick Sections, the average temperature of the concrete I
tested will be less than 70*F.
Temperatures will be taken whenever concrete tests are performed, or as otherwise directed by the' Contractor.
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I (B) 70*F criterion is applicable only after all the methods of i
i cooling the aggregates (including upto 100% ice) have been ud.
Whenever it is necessary to use 100 percent ice, the moisture content of the fine, aggregate (sand) shall be limited to 5 percent (even dry basis). No unselted ice shall remain in the concrete at the end of the mixing period.
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. 14 4
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l 7220-C-230 (q)
'Rev. 11
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The Subcontractor shall submit for testing, the water used in the ice if such water comee from a different source than the'I mixing water.
Water for ice shall conform to Section 7.3.
The Contractor shall advise the Subcont.setor in writing, of the proposed use of concrete for each placement.
It is the Subcontractor's responsibility to see that the concrete does not exceed the specified temperatures.
placement, unless correlation tests are performed. Temperatu Ice so used will be paid for under pay item 30. testing is in effe i
ge.
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l 7220-C-230(Q) g Rev.11 12.1 General As specified herein and in Technical Specifications 7220-C-208,
" Subcontract for Materials Testing Services", the Subcontractor shall, at his expense, provide, in the amount required and from the sampling points designated by the contractor, samples to be 1
i tested by the Contractor.
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12.2 Testing of Materials All tests 'shall be perfor: ed in strict accordance with applicable AftM Standards and the Subcontractor shall furnish all materials for user tests.
12.2.1 cement Subcontractor shall furnish mill test reports for each load of cement delivered, showing the chemical composition and physical properties and certifying that the cement i
- complies with Section 7.1 of these Specifications.
To confirm the mill tests and the compliance certifica-tions, the Contractor will sample cement on the job as required by Technical Specification 7220-C-208, and aske the necessary tests. No cement shall be used until notice has been given by the Contractor that the Accep-
~
tance Test results are satisfactory. Cement which has been stored elsewhere than in the bins at the mills for i
more than 4 months after being tested shall be ratested before use.
Any cement delivered at the site and found
[
to be unsuitable shall be removed from the premises by i
the Subcontractor at his expense.
12.2.2 Aggregates 4
,I Upon averd of the Subcontract, the Subcontractor shall submit samples from his selected aggregate source, as required by Technical Specifications 7220-C-208, for s
testing by the Contractor in accordance with methods I
i specified in the " Standard Specifications for Concrete Aggregates" (ASTM C33-71a). Acceptability of aggregates and source shall be based on the following ASTM tests:
. Method of Test ASTM Designation L. A. Abrasion C 131-69 Friable Particles C 142-71 e
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7220-C-230(q)
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Method of Test ASTM besignation Material Finer No. 200 Sieve C 117-69 Effect Organic Impurities on Strength of Nortat C 87-69 Organic Impurities in Sands C 40-66 Fotential Reactivity of Aggregates (Chemical)
C 289-71
' Fotential Reactivity of
^
Aggregates (Mortar Bar)
C 227-71 (If neces-jfl sary af ter perform-ing C-289)
Sieve Analysis C 136-71 i
Soundness of Aggregates C 88-71a Specific Cravity and Absorption-Coarse Aggregate C 127-68 4
Specific Gravity and Absorption-Fine Aggregate C 128-68 Scratch Hardness of Coarse Aggregate C 235-68 Petrographic C 295-65'
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Coarse aggregate may be rejected if the loss from the l
Los Angeles abrasion test, ASTM C 131-69, using Grading A exceeds 40 percent by weight at 500 revolutions.
When aggregates contain montmorillonite clays, topsoil and claystone, fine aggregate shall have a minimus Sand Equivalent of 75 when tested in accordance with Test Method No. Calif 217 and coarse aggregate shall have a minimum cleanness value of 75 when tested in accordance with Test Method No. Calif 227, as specified in the California Division of Highways Test Methods.
During the progress of the work, aggregates will be tested as specified by Technical Specifications 7220-0-208 and ACI Manual of Concrete Inspection (SF-2, '1967).
No aggregate shall be used in concrete for the work until acceptability has been verified by Contractor.
l
' 7220-C-230(q) g Rev. 11 12.2.3 A M wtures a.
Possolans Chemical and physical tests will be performed by the Contractor on pozzolans during the work as specified in ASTM C311-68, ASTM C618-72, and Technical Speci-fications 7220-C-208.
b.
Water Reducing and Air Entraining Agents tipon selection and approval of the water reducing agent and the air entraining agent, the manufacturer shall furnish certifications for every delivery stat-ing that the materials originally approved have not 1
been changed.An. infrared spectrophotometry analysis report shall also be furnished with each delivery.
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12.3 Concrete and Grout' Testing h
i
.'During the progress of the work, concrete, as mixed, will be l sampled and tested by the Contractor for slump, air content.
temperature, unit weight, and compressive strength, as required i
by Technical Specificaticas 7220-C-208. Grouts with higher cement-sand ratios than the associated concrete mix shall be sampled and tested as required by Technical Specification g
{7220-C-2,08, _,_ _ _,,,_,, _,_,
12.4 Test Results 12.4.1 Materials Materials which fail to meet the requirements of the tests shall not be used and shall be removed from the site by the Subcontractor, unless the Contractor directs otherwise.
12.4.2 Temperature, Slump, and Air Tests r-If the temperature,7220 c-208 secslump or air content is estice.ated by
'A
-- corre)ntion (Spec.
. 7.4) or foimd to be :
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out, side the limits specified, a check test will be made.
In the event of a second failure, the batch of concrete represented will be rejected.
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12.4.3 Compressive Strength Tests i
Compressive strength cylinders will be cast, cured and tested by the Contractor. The Subcontractor shall, at his expense, provide necessary tools, equipment and personnel to assist Contractor in obtaining suspies mal casting cylinders.
Cause for concrete rejection shall be in accordance with the " Building Requirements for Reinforced Concreta" (ACI Standard 318-71, paragraph 4.3.3).
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i 7220-C-230 (Q)
Rev. 11 g
I 12.4.4 Failure to Meet Strength Requirements If the compressive strength tests fail to meet the above 1.
requirements, the Contractor may require that load tests i
be made or cores drilled and tested for those portions of the work where the questionable concrete has been placed. The Contractor will determine the cause of the questionable concrete.
If it is determined that the con-crete does not conform to these specifications and the
+
required mix design such tests or drilling shall be at the i
subcontractor's expense and the Contractor will backcharge the Subcontractor to either replace or repair the defective concrete or take other corrective measures.
i 12.5 Records j
Engineering and quality verification documents shall bc submitted to Contractor in accordance with the provisions of Form G-321-D.
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While in the Subcontractor's facilities these and other records required by applicable codes and standards which are necessary to verify activities affecting quality, shall be maintained in facilities to protect contents from possible destruction by causes j
such as fire, flooding, tornadoes, insects, rodents, and from j
possible deterioration by a combination of extreme variations in temperature and humidity conditions. Storage systems shall be provided for the accurate retrieval of information without undue delay.
(Compliance to ANSI N45.2.9, " Requirements for i
Collectica, Storage, and Maintenance of Quality Assurance i
Records for Nuclear Power Plants" fulfills these requirements.)
Quality assurance records are those records which furnish documen-i tary evidence of the quality of items and of activities affecting
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quality. Records become quality assurance records upon issuance i
for use.
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13.0 INSPECTION 1
j 13.1 General
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The measuring, batching and mixing of all concrete and materials shall be in accordance with the ACI Manual of Concrete Inspection i
.I (SP-2, 1967), and the " Specifications for Structural Concrate Buildings",(ACI Standard 301-72).
i, Tte inspection of concrete construction will follow the requirements i
I of ANSI N45.2.5 Sections 4.1 through 4.3 as modified below or within this specification:
I 10 13.1.1 Inspection of preparations for concreting, placement, curing, and protection is not included under this subcontract.
13.1.2 Printing zero tare weight on the batch plant tickets as j
required by NRMCA Concrete Plant Standard is not applicable.
I 1
13.1.3 Inspection of water measurf.ng devices on transporting
. equipment is not required.
3 1
7220-C-230(Q) b Rev. 11 l
13.2 Batch Plant Inspection During concreting operations, the Contractor will have an inspector at the batch plant who will certify the mixed proportion of each batch delivered to the site by signing the batch delivery ticket and recording the location of the pour. The inspector will sample J
and test at least once per day the concrete and the concrete i
ingredients and verify the proper setting and operation of scales 8
and devices. Adequate standard test weights shall be furnished by the Subcontractor for checking accuracy of scales when required.
The inspector will also determine yield of concrete to ascertain compliance with the design six weights.
The Subcontractor shall provide suitable devices for obtaining representative samples from the discharge of the mixer and i
for delivering samples of concrete to ground level. Suitable and convenient devices shall be provided for sampling and handling each size of aggregate as it drops from the bins or weigh hoppers j
or from other designated locations. A platform with ladder or stairs for access from the control room floor, shall be provided to permit visual inspection of the concrete in the mixer while sixing operations are in progress. All necessary platforms, tools, equipment and personnel used to assist the inspector in l
obtaining samples shall be furnished by the Subcontractor.
Concrete specimens will be prepared from the mixtures used in J
the work and tested to determine the adequacy of control of the j
asterials entering the concrete mix.
t The Contractor's Batch Plant Inspector shall not act as a foreman or perform other duties for the concrete supplier. Work will be checked as it progresses, but failure to detect any A
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defective work or materials shall not in any way prevent later 4MA rejection when such defect is discovered, nor shall it obligate the Contractor for final acceptance. Inspectors are i
not authorized to revoke, alter, relax, enlarge, or release any requirement of the Specifications.
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7220-C-230 (q) 4 Rev. 11 14.0 MEASUREMENT AND PAYMENT 14.1 On-Site Batch Plant The Subcontractor shall purchase from the Contractor the existing on-site batch plant and associated equipment.
SC-4A for details)
This includes:
(See
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- Batch plant and all appurtenant equipment
- Trucks
- Well equipment ~ (See' SC-3 'for details) f l
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The bidder shall, therefore, include in the bid a lump sum amount (Item 1) to be paid for this equipment. This amount will consti-tute payment in full for the batch plant and all associated equip-ment, and is to be paid before the transfer of' ownership.
l The transfer of ownership of the batch plant will be effective on i
i the day the Subcontractor assumes operation of the batch plant under this Subcontract.
14.2 Mobilization Fee The Subcontractor will be paid a lump staa mobilization fee (Item 2) l to cover the cost of mobilizing his manpower and equipment and i
providing the additional equipment essential to meet the specified 4
. lob requirements but not furnished by the Contractor.
I Payment will be made under this item when the Subcontractor has assumed operation
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of the batch plant, a sufficient stock of approved materials is on hand to permit continuous placement of at least 5,000 cubic yards of concrete, and all required certifications for plant and materials l
have been submitted to and approved by the Contractor.
l 1
14.3 Material Stockpiled On-Site 1
Stockpiled adjacent to the batch plant is an unknown quantity of aggregate r'emaining from a previous Subcontract.
i This meterial will be given to the Subcontractor at no charge and, hence, becomes his responsibility.
If used in the work the Subcontractor will be responsible for the materist meeting the provisions of this specification, i
4 14.4 concrete and Grout 4
The quantity of i'ertland cement concrete and grout for which pay-me :: v'11 be wie will be the number of cubic yards or the various classes (Items 3-16) ordered by the Contractor and delivered in i
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j 7220-C-230 (Q) f Rev. 11 L"
accordance with these Specifications, and used in the completed work or in tests.
Standby time and air entraining agents will not be measured for direct payment, but will be considered sub-sidiary obligations of the Subcontractor, payment for which shall be included in the Subcontract unit price per cubic yard for the various classes of concrete. All cement and admixtures (other than AEA) will be paid for under other pay items; this item includes l
payment for all ~ aggregates, sand, and water used.
Measurement of quantities of concrete and grout produced at the on-site batch plant will be based on Cote rete Mixer Report QC-2C, which will be made out at the end of each shift and signed by representatives of the Contractor and Subcontractor.
i 14.5 Cement 1
The quantities of Portland cement for which payment will be made i
will be the number of 376 pound barrels (measured to the nearest barrel) of Portland cement satisfactorily used in the work. (Item 21) 4 Quantities recorded on the Concrete Mixer Report QC-2C shall pro-vide the measurement for payment for cement used in the on-site batch plant.
14.6 Admixtures The quantity of admixtures of the various types, for which payment will be made, will be the number of pounds or gallons of the various types of admixtures. (Items 23, 24 and 28)
The quantity of possolan admixture for which payment will be made, will be the number of tons of possolan used in the completed
)
work (Item 22), measured to the nearest 1/10 ton (200 lbs).
I As statG in Section 14.4, no payment will be made for air i
entraining agents.
t Quantities recorded on the Concrete Mixer Report QC-2C shall pro-vide the measurement for payment for admixtures used in the on-site a
batch plant.
1 14.7 Heating and Cooling 2
The quantity of heating and cooling provided in accordance with section 11.0, for which payment will be made, will be the number of cubic yards of concrete, vsed in the completed work, which required heating or cooling (Items 29, 30s, 30b, and 30c).
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Quantities recorded on the Concrete Mixer Report QC-2C shall pro-vide the measuremerte for payment for the number of cubic yards of concrete requiring heating or cooling.
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I 7220-C-230(Q)
Rev. 11 b
14.8 Non-Shrink Grout and Mortars 14.8.1 Furnishing Component Materials The quantities of materials for non-shrink grout, mesonry i
mortar, and dry pack mortar for which payment will be made, will be the quantities, furnished at the job site, required for mixing and/or placing by others.
gand will be measured and paid for by the cubic yard. (Item 20)
Hydrated line will be measured and paid for by the sack.
(Item 27) t Non-shrink grout additives and premixes will be measured and paid for by the pound.
(Items 25 and 26)
Measurement for payment for the quantities of materials i
furnished under these items, shall be based upon supplier's i
invoices submitted by the Subcontractor.
14.8.2 Furnishing Mixed Non-Shrink Grout and Mortar The quantities of mixed non-shrink grout, mixed masonry mortar and mixed dry pack mortar (Items 17,18 and 19),
for which payment will be made, will be the number of cubic yards furnished for placing by others.
I The bid prices shall not include costs of cement, hydrated line or non-chrink grout additives.
Cameat will be measured for payment as stated in Section 14.5.
(Item 21)
Mydrated line will be measured for payment as stated in gection 14.8.1..(Item 27) l Mon-shrink grout admixtures and premixes will be measured for payment as stated in Section 14.8.1.
(Items 25 and 26)
Medsurement for payment for the quantit.ies of mixed non-shrink grout, mixed masonry mortar, and mixed dry pack mortar shall be based upon the quantities recorded on the Concrete Mixer Report QC-2C.
14.9 overtime compensation for overtime will be the direct excess labor cost, for the premium time only, for overtime required to complete pours scheduled by the Contractor. Premium time for overtime required by the subcontractor to perform routine maintenance and other work in sonnection with his batch plant operations will be at the Subcon-trastor'a ' expense.
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