ML20127C261
| ML20127C261 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 11/26/1975 |
| From: | J.A. JONES CONSTRUCTION CO. |
| To: | |
| Shared Package | |
| ML17198A241 | List:
|
| References | |
| FOIA-84-455 W-WP-7, NUDOCS 8506220180 | |
| Download: ML20127C261 (10) | |
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g Procedure No. W-WP-7 J. A. JONES CONSTRUCTION COMPANY ,
v CONSTRUCTION WORK PROCEDURE hla Gj.#, 2-FOR -
- 3kM CONCRETE Pl. ACING, CURING, FINISHING AND REPAlRS Swo or '
l WATERFORD SES UNIT NO.3 l ,
CONTRACT NO. W3-NY-4 .
ENGINEERING QUALITY ASSURANCE CONSTRUCTION .
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3 J. A. JOTES CONSTTJJCTION COMPANT PAGE 10F 7
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CCNSTFJ;0 TION WOFI PROCEDU?I .y,g7
. :- ;3 F27. UO 1 CONCRETE PLACING, CURING, FINISHING AND REPAIRS
& DA :11 26/75 TEDJECT TITLE:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 1.0 PURPOSE .
To outline methods used by J. A. Jones and Subcontractors to place, cure, finish and repair concrete.
2.0 SCOPE Th'is procedure includes the requirements to be used by J. A. Jones and their Subcontractors to comply with approved construction drawings and specifications.
3.0 DEFINITIONS ,;
3.1 Water The water used for all aspects of this procedure shall be furnished and certified acceptable by the Engineer. It shall be free from any injurious amounts of acid, alkall, salts, sediment or organic matter and shall not contain more than 1000 ppm of dissolved solids and not more than 100 ppm
. chloride lon.
32 Hot Weather Hot weather is when the dry bulb temperature is above 85 F and is expected to go higher.
3.3 Cold Weather Cold weather is when the dry bulb temperature is at or below 40 F 0 and can be expected to fall lower.
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4.0 REFERENCES
R-1 4.1 Ebasco Services, Inc. Specification LOU-1564.472, Section 11, latest revision.
" Concrete Placement,, Curing and Finishing".
4.2 J. A. Jones Procedure, W-SITP-7, " Concrete Placing, Curing, Finishing and Repair inspection".
5.0 RESPONSIBILITIES
- 5.1 Ebasco Services, Inc. Is responsible for furnishing all materials receiving l Inspection, testing and documentation of such test as required by Reference 4.1 to support J. A. Jones and their Subcontractors in performing their work.
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J. A. JONES CONSTRUCTION COMPANY PAGE 2 or 7 1 FROCEDURE Mo.
i ONSTRUCTION WORK PROCEDURE W-WP-7
$I'"LE: REV.1:0 1 CONCRETE PLACING, CURING, FINISHING AND, REPAIRS & DATE: 11/26/75
?ROJECT TITLE:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4
. 52 J. A. Jones and their Subcontractors are responsible for forming, placing, curing, finishing, repairing and inspection of concrete as required by the approved drawings and specifications. .
6.0 TRANSPORTATION ,
R-1 6.1 Convey all concrete from mixer to place of' final dep.osit in bucket, con-tainer or conveyors to assure required consistency and plasticity without segregation or loss of slump beyond limits of specification.
6.2 Check time and number of drum rotations af ter water has been added to the cement and aggregate. Concrete must be placed in forms within one (1)-
4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or 300 rotations of drum whichever.one occurs first, unless authorized by the. Engineer and then time must not exceed 'one and one-half (It) hours.
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R-1 6.3 Wa ter shall be added only by the Engineer.
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R-1 6.4 Clean all tools and equipment used in placing concrete before and after' p1acement.
7.0 PLACING ,
R-1 7.1 Obtain Engineer review of equipment, layout, procedures and methods prior to placing concrete.
4 7.2 Olscharge concrete f rom mixer into center of bucket or hopper. This prin-ciple of vertical discharge shall be used during all stages of delivery.
4 73 Deposit concrete as near rs practicable to its final location. When direct placement is not possible, use suitable chutes and " elephant trunks" to confine concrete moveneat. Do not allow concrete to flow in a manner that will cause segregation.
7.4 Use a central-botten dump bucket that provides positiv,e regulation of amount and rate of deposit in all dumping positions.
7.5 When placing concrete with bucket, spot bucket over exact location, then lower to just clear.the concrete already in place, avich bucket open. The unconfined height must not be more than five (5) feet unless approved by 1 i Engineer. Do not dump buc'ket while swinging or in any manner that will cause separation or disturb previously placed concrete, i
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v J. . JONES CONSTRUCTION COMPANY PAG . 3 0F 7 r PROCi:0URI ;io, t
IC0"STRUC ION WORK PROCEDUF2 W-WP-7 F2v. NO 1
':'ITI2. & 1 75 CONCRETE PLACING, CURING, FINISHING AND REPAIRS
?ROJECT TITI2:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 7.6 in restrieted areas, place concrete in forms using barrow, buggles, cars or hand shoveling. Take care not to allow vertical drop of over five (5) feet.
R-1 7.7 Slope on chutes shall not be flatter than 1 to 3 and not steepe'r than 1 to I R-1 7.8 Aluminum or galvanized steel pipe will ,not be used to convey concrete.
R-1 7.9 Obtain Enginear inspection of cleanliness prior to placing concrete.
7 10 RemoveNo all surface water from fones, embeds, resteel, and adjoining con-concrete will be p1' aced on a water covered surface.
crete.
Correct 7.11 Place cqncreto in successive 6 to 20 inch thick horizontal layers.
tendency to segregate by shoveling stones into mortar.
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7 12 Bedding planes shall be approximately horizontal, except inWithout dams or other forms, structures where it may be required to incline the beds.
on a downward slope of about one (1) vertical to ten (10) horizontal in an upstream direction in which case the placement shall proceed in an upsigpe
~ direction. . ,
7.13 Compact concrete with mechanical vibrating equipment until the concrete has been consolidated to the maximum density, free of pockets or coarse aggregate, and fits tight against forms and embed material.
l 7.13 1 Use vibrators of the high-frequency type with not less than 600.0 revolutions per minute, to properly consolidate the concrete.
7 13.2 Insert vibrators approximately every 2 feet In the vertical positic Remove vibrator slowly to avoid creating pockets. Do not use vibrators to transport the concrete.
7 13 3 Use vibrators to blend and meld new layer with previously placed layer. Care must be taken to assure adequate vibration.
7.13.4 Insure vibrator penetrates the layer being placed and also the layer below while it is still plastic to provide good bond between the two layers and prevent the formation of cold joints.
7.13 5 care must be taken to minimize contact.between vibrator and rein-forcing steel. Do not allow vibrator to contact reinforcing steel extending out of concrete that has reached a stage of initial set, within five (5) feet of the concrete. Do not allow contact with I forms of finished surfaces.
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J. A. JONIS CONSTRUCTION COMPANY PA02 4 or 7 i
t PROCEDUEE SO. 4
!C0%SInUCn0N WOPS, PROCEDURE W-WP-7 l
'TI I.E : EEV. E0 1 '
CONCRETE PLACING, CURING, FINISHING AND REPAIRS
& DAZI: 11/26/75
?ROJECT IITLE:
WATERFORS SES UNIT NO. 3 CONTRACT NO. W3-NY-4 7.13.6 Obtain Engineer approval before using any form attached vibrators.
7.13.7 Obtain Engineer approval prior to using any surface vibrators. -
7.13.8 All areas of stone pockets and mortar pondage is unacceptable.
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These areas shall be removed and replaced as directed by the Engineer.
7.14 Install horizontal and vertical construction joints as shown and detailed on the approved construction drawings. ,
R-! 7.15 Remove wash water in a manner to prevent it from running down and staining exposed faces. Should staining occur, It shall be removed.
7.16 in multiple lif t placement, allow each placement.to set 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or longer
. If required by Engineer before placing next lift. The interval may tut shortened by the Engineer for certain locations.
8.0 CURING
~ 8.1 Cure coner,ete by using water applied continuously to 'all exposed concrete.
8.2 Assure ample water supply for continuous fine-mist spraying or sprinkling.
8.3 Obtain certification from Engineer for water supplied for curing. Water shall meet requirement in Paragraph 3.1 of this procedure.
8.4 If water curing cannot be used, obtain Engineer approval of alternate method. Other methods are covering with mulch, curing compounds and ponding as outilned in Reference 4.1.
R-1 8.5 The concrete shall be kept above 50 0 F in a moist condition for at least the first seven (7) days af ter placing, except as follows:
8.5.1 High-early concrete shall be cured for at least the first three (3) days, other period may be used if approved by Engineer.
8.5.2 Concrete ;ontaini,ng pozzolon shall be for not less than 14 days.
- 8.5.3 For curing during " hot" and " cold" weather conditions refer to i Reference 4.1.
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J. A. JONES CONSTPECTION COMPAN'? PAGE 5 0F 7 i
PRCCF.Z?2 I;o.
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SO::STRUCTION WORK 2ROCILifRE V-WP-7 9
F2V. 1;O 1
'- ::LE: {
CONCRETE PLACING, CURING, FINISHING AND REPAIRS
& IATI:11/26/75 I
?ROJECT TITLE:
I WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 8.6 All equipment required for curing shall be on hand, checked out an'd ready for use prior to placing concrete.
8.7 Fresh concrete shall be protected by leaving forms in place as required.
Assure against disturbing by shock, vibration and premature stressing until i the concrete has attained sufficient strength to sustain the load. !
3 8.8 Instruct each worker in the importance of not disturbing green concrete during its setting period. Wo rker with duties on freshly placed concrete slabs shall wear wooden " slats" approximately 8 x 18 inches.
9.0 REPAIR -
Unsatisfac' tory concrete shall be cut out and replaced with new concrete as soon as practicable af ter removal of forms.
Provide anchors, keys or dovetail slots by grinding and chipping to hold 91 new material securely in place.
9.2 Method of repair, matching of color, curing and Engineer approval shall be performed per Reference 4.1. -
10.0 FINISHING FORMED SURFACES 10.1 No finishing is required for formed surfaces against which backfill or concrete is to be placed, except repair of defective areas and filling of holes left by form ties and rods.
10.2 Surfaces below grade which will receive waterproofing shall be free of Irregularities which would interfere with proper application of the water-proofing material..
10 3 Surfaces which will be exposed when structure is in service will receive no special finish. Repair damaged or defective concrete, remove fins &"
in height, and abrupt irregularltles, fill holes left by form ties and rods.
11.0 FINISHING UNFORMED SURFACES 11.1 Surfaces exposed to the weather which the approved construction drawings do not specify a horizontal surface or slope required shall be as follows:
i 11.1.1 Tops of narrow surfaces, such as stair treads, walls, curbs and l parapets shall be sloped approximately 3/8" per foot of width.
,' 11.1.2 Broad surfaces, such as walks, roads, parking areas and platforms shall be sloped approximately &" per foot of width.
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- ' J. A. J02E.S CONSTRUCTION COMPANY PAGI 6 OE 7
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l ??.CCCU?2 NO.
CO 'STRUCTION tiORK PROCCU3E p FlV. :C
'TITII: & C. I 1
US CONCRETE PLACING, CURING, FINISHING AND REPAIRS
?ROJECT TITII:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 11.2 Screed and level all surfaces to be covered by backfill or concrete, sub-floors to be covered with concrete topping, terrazzo or quarry tile and similar surfaces. Surface irregularities shall not exceed t" higher or lower from the specified surfaces. .
11 3 Surfaces that will not be covered by backfill, concrete or tile topping ,
shall be consolidated, screeded and floated. Perform floating by hand I or machine. Assure surface is free from screed marks or other imperfections and that surface is uniform in texture. Tool joints and edges as shown on the approved construction drawings.
11.4 Surfaces subjected to moderate 'oIhigh velocities or water shall be screed to correct shape required by approved construction drawings, then floated with wood floats to secure a firm, uniform texture without raising excess fine material to the surface. When surface has hardened sufficiently, it '
shall be brought to a uniform smoothness by using a steel trowel. Steel trowel with a firm pressure to flatten the sandy texture and leave d dense, uniform surface free from trowel marks.
11.5 .All concrete shall be protected against damage untII final acceptance by the Engineer.
it-1 ti.6 Use special care in the finishing of floor areas of offices, shops, assembly ,
rooms and other areas where appearance is important. Special floor' finishes shall be in accordance with Reference 4.1.
l 12.0 FORMS All forms shall be built true to slopes, lines and dimensions. They shall be properly tied and braced to maintain correct position and shape until removed. I R-1 12.1 Form design and materials shall be subject to the Engineer's review.
12.2 Form oils shall. be approved by the Engineer and applied per Reference 4.1.
12 3 Chamfors and fillets shall be installed per the approved construction drawing and Reference 4.1.
12.4 Forms shall remain in place for time specified in Reference 4.1.
- 13 0 ADVERSE WEATHER CONDITIONS I
All concrete placed in hot or cold adverse weather conditions shall be placed in accordance with Paragraph 8 of Reference 4.1.
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J. A. JONES CONSTRUCTION COMPANY PAO: 7077 PRCCEOURE 50. ;
lCOMSTRUCTICN WORK FR00EDt!RE W-WP-7 TITLE: FIV.1:0 1 '
CONCRETE PLACING, CURING, FINISHING AND REPAIRS
& DATI: 11/26/75 l?ROJICT TITLE:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 14.0 DOCUMENTATION All Engineer approvals shall be obtained and become a part of the final document
. record package and be turned over to the Engineer after'ench pour is completed.
14.1 All work relating to each pour shall be completed, checked and approved prior to placement of concrete. The J. A. Jones " Concrete Pre-Placement
- Checklist Record", Appendix A, shall be completed for each pour. The J. A. Jones " Concrete Pre-Placement Checklist Record" shall be prepared by the Area Superintendent giving the pour number, concrete mix, building location and scheduled pour date. As each item of work is completed, the Field Superintendent shall sign off by the work activity including the
- date, time and drawing including the revision the work was performed by.
The Jones Field Engineer shall check each work Item and sign off by the .
work activity including the date, time, drawing and revision used to make the check. If errors are found, the Jones Field Engineer shall not sJgn off until they have been corrected and checked. The Jones Quality Verifi-cation inspector shall verify that the work has been completed and checked.
He then shall sign off including the date, time drawing and revision used for the verification. All applicable blocks shall be completed. All other blocks shall be marked N/A. When all' work, checking and verification has been completed, the Area Superintendent and the Area Quality Verification Supervisor shall sign off and date in the space provided.
14.2 When the pour has been completed, the actual pour date shall be placed in space provided and the J. A. Jones " Concrete Pre-Placement Checklist Recora" l
shall become a part of the final document record package.
R-1 14.3 Af ter the Area Superintendent and Quality Verification Supervisor has signed off the J. A. Jones " Concrete Pre-Placement Checklist Record" verify-Ing that Jones is ready to place concrete, the J. A. Jones Quality Verifica-tion Supervisor shall be authorized to sign off the Ebasco " Concrete Pre-Placement Checklist Record", Form QCIP-6-1, Appendix B, In contractor column indicating J. A. Jones is ready to place concrete.
14.4 After all required signatures have been secured and the pour is approved for concrete placement, J. A. Jones shall be provided a copy of the Ebasco " Concrete Pre-Placement Chacklist Record" and it shall become a part of the final document record package which will be turned over to the Engineer af ter the placement.
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WATERFORD SES - UNIT 3 CONORETE PRE-PLACD:ENT CHECKLIST RECORD Location:
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l Elevation: to Pour No.,
Detailed Descripcion: .
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ITDi CONTRACTOR INSPECTOR l DATE Da a
, Sandblast /Greencut / Foundation Treatment ,
Forms (Line and Grade) l Blockouts, Keys, Waterstop, etc. ,
i Reinforcing Steel Anchor Boles," Embedded Steel Elsetrical l
j Hechanical Final Clean-up 4
Special Instructions:
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Approved for Placinn Time Dato Q. C. Representativa QCIP-6-1 APPENDlX 8 i
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