ML20127C327
| ML20127C327 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 05/24/1976 |
| From: | J.A. JONES CONSTRUCTION CO. |
| To: | |
| Shared Package | |
| ML17198A241 | List:
|
| References | |
| FOIA-84-455 W-WP-7, NUDOCS 8506220198 | |
| Download: ML20127C327 (14) | |
Text
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3
..ocedure No.
W-WP-7 J. A. J0llES C0f;STRUCT10N COMPANY CONSTRUCTION WORK PROCEDURE FOR CONCRETE PLACING, CUklNG, FINISHING AND REPAIRS t
a WATERFORD SES UNIT NO.3 CONTRACT NO. V3-NY-4 ENGiflEERING QUALITY ASSURANCE CONSTRUCTICN REV.
DATE APPROVED DY CATE s
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J. A. ~ 'ONES CONSTRUCTIO11 COMPldIY PAGE 1 0F 10 PROCEDURE 140.
CONSTRUCTION UORK PROCEDUPI W-WP-7 IITLE:.
REV. No 6
CONCRETE Pl. ACING, CURING, FINISHING AND REPAIRS 5/24/76 PROJECT TITLE:
WATERFORD 3ES UNIT NO. 3 CONTRACT NO. W3-NY-k 1.0
, PURPOSE To outline methods used by J. A. Jones and Subcontractors to place, cure, finish and repair concrete.
2.0 SCOPE 4
This procedure includes the requirements to be used by J. A. Jones and their Sub-contractors to cornply 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 certifled 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 trore than 100 ppm chloride lon.,
3.2 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 th'e dry bulb temperature is at or below 400F and can be expected to fall lower.
R-5 3.4 Cold Joint I
A cold joint is defined as an area in which previously placed concrete cannot be made monolithic with a successive layer due to loss of plasticity it) the original layer, where concrete shall be considered plastic if a vibrator spud, up to 2 inches diameter, suspended vertically, will penetrate to a depth of at least 6 inches in a period of 15 seconds.
R-1
4.0 REFERENCES
4.1 Eb'asco Services, Inc. Speelfication 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".
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.1. A otIES CONSTRUCTION COMPANY PAgg 2 0F 10 GseaTRUCTION 110RK PROCEDURE PAOCEDURE No.
W-WP-7 EZZI.E:-
REV. No 6
CONCRETE Pl. ACING, CURING, FINISHING AND REPAIRS
' ATE:
5/24/76-
. PROJECT TITLE:
WRTERFORD SES UNIT NO. 3 CONTRACT N0. W3-NY-4 5.0 RESPONS 18 ilITIES 5.1 Ebasco Services, Inc. Is responsible for furnishing all materials, receiving 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.
5.2
' J. A. Jones and their Subcon' tractors are responsible for forming, placing, curing, finishing, repairing and Inspection, of concreta as required by the approved drawings and specifications.
6.0 TRANSPORTATION R-1 6.1 Convey all concrete from mixer to place of final deposit In bucket, container or loss of slump beyond limits of specification.or conveyors to assure re A-4 6.2 check time and number of drum rotations after water has been added to the cement and aggregate, as deemed necessary.
Concrete must be placed in forms within one hour or 300 rotations of drum dishever one occurs first, unless authorized by the Engineer and then time must not exceed one and one-half hours.
R 6.3 Water shall be added only'by the Engineer.
4 6.4 Clean all tools and equipment used in placing concrete before and after placement k2 6.5 At any time le becomes necessary to break down concrete conveying equipment for cleaning or repair during a placing operation. care shall be taken to prevent the concrete contained in the equipment from being dropped in excess of 5'-0" into the placement.
6.5.1 Acceptable concrete contained in the conveying equipment may be transported by other acceptable means (skip pans, wheel barrows.
carts, etc.) and deposited in the ' placement by the approved method, except that concrete,must not be dropped in excess of 5'-0" or handled in any other way that would cause segregation.
Concrete that has been handled in any detrimental method shall not be placed in the placement.
6.5.2 i
When it is necessary'to disassemble conveying equipment over the l
Placement and the concrete would fall in excess of 5'-0", the area o
shall be covered with plywood or other.sultable material to catch l
' the concrete' and prevent it from falling into the placement.
Concrete -
that has fallen in excess of 5'-0" or headled in any other detrimental method or that cannot be placed in the allemed time limit shall be i
removed from the placement area and discarded.'
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J. A, ONES CONSTRUCTION COMPANY PAGE 3 0F 10 PROCEDURE tiQ.
i j
CCIISTRUCTION WORK PROCEDURE f
W-WP-7 IITLE.
REY. !;0 6
I
' DATE:
5/24/76-CONCRETE PLACING, CURING, FINISHING AND REPA.lR$
i PROJECT TITLE:
WATERFORD SES UNIT N0. 3 CONTRACT NO. W3-NY-4 t
70 PLAC ING j
R-1 7.1 Obtain Engineer review of equipmen't, layout, procedures and methods, prior i
j to placing concrete.
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7.2 olscharge concrete from mixer into center of bucket or hopper.
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principle of vertical discharge shall be used during als stages of delivery.
7.3 oeposit' concrete as near as practicable to'Its final location.
When direct 6
placement Is not possible, use suitable chutes and " elephant trunks" to confine concrete movement.
Do not. allow concrete to flow in a manner that j
will cause segregation.
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7.4 Use a central-bottom-dump bucket that provides posIttve regulation of i
amount and rate of, deposit in all dumping positions.
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7.5 When placing concrete with bucket, spot, bucket over exact location, then i
lower to just clear the concrete already in place, with bucket open.
The
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unconfined heLight must not be more than five feet unless approved by the i
4 Engineer.
Do not dump bucket while swinging or in any manner that will l
i cause separation or disturb previously, placed concrete.
i 7.6 in restrleted areas, place concrete in forms using barrow, buggles, cars or hand shoveling.
Take care not to allow vertical drop of over five feet.
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7.7 Slope on chutes shall not be flatter than I to 3 and not steeper than I to 2.
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l R-l-7.8 Aluminum or galvanfred steel plpe will not be used to convey concrete.
t A-l 7.9 Obtain Engineer inspection of cleanliness prior to placing concrete.
i 7.10 Remove all surface water from forms, embeds, resteel, and adjoining concrete.
j No concrete will be placed on a water covered surface.
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7.11 place concrete in successive 6 to 20 Inch thick horizontal layers.
Correct l
tendency to regregate by shoveling stones into mortar.
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7.11 todding planes shall be approximately horizontal'. except. In dams or other
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structures where it may be required to incline the beds.
Without forms, on a downward slope of about one vertical to ten horizontal in an upstream direction In which case the placement shall proceed in an upelope direction.
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7.13 compact concrete with mechanical vlbrating equipment until the concrete has
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been consolidated to the maximum density, free of pockets or coarse aggregate, f
and fits tight against forms and embed material.
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J. A..J17.5 CC'!STRUCTION C0tfANY PAGE 4 or jo
~ PAQCEDURt. tio.
CGISTRUCTION UCRK PROCEDURE W-WD-7 IITLE:-
REV. !;0 6
' DATE CONCRETE PLACING. CURING. FlHISHING AND REPAIR $
5/ 24/76 * '
PROJECT TITLE:
WRTERFORD SES UNIT N0. 3 CONTRACT NO. W3-NY-4 R-6
'7.13.1 Use vibrators of the high-frequency type with not less than 6000 revolutions per minute, to properly consolidate the concrete.
See Appendix 0.
7.13.2 Insert vibrators approximately every 2 feet In the vertical' position.
Remove vibrator slowly to avoid creating pdckets.
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.
A-5 7.13.4.1 should the olacement of concrete to be curtalled for any reason or if the placing gets out of sequence, the minimum thickness requirements for successive horizontal layers In Paragraph 7.11 no longer apply.
Keep the entire
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exposed surface not topped out, covered with fresh horizontal layers of concrete as thick as the supply will allow and keep vibrated.
R-5 7.13.4.2 If the possibility of a cold joint exist, testthe surface
' with a blunt end rod.
If the rod can be' Inserted into the concrete only 2 or 3 inches, test the concrete by the method described in Peregraph 3.4 above. ' By this method, If it is determined that a cold joint exist, stop work Imediately in area of cold joint.
A-5 7.13.4.3 If after work stoppage In placement, concrete Is so green that It can readl1y be dug out with a hand picli, then no
, treatment shall be required, provided any laitance is removed, the surface roughened, loose material removed and the surfaces are kept molsti the concrete shall be placed against the surfaces and thoroughly and systematicall vibrated over the concrete ares adjacent to the older concrete.
n'.5 7.13.4.4 in placements,when the concrete is not green, as described In the proceeding paragraph, the surface shall be r' ughened o
and cleaned of any f altance and loose material, and coated with Sika-HI-Mod Epoxy or approved equal and the fresh concrete thoroughly vibrated beside the affected area.
In all cases where epoxy is used, the manufacturer's Instructions, particularly as regards time limits, shall be
- followed, in all cases, surfaces shall be kept moist after cleaning entil concrete is plased.
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J. A.
sNES CONSTP.UCTIO3 CottPANY PACE 50F 10 PROCEDURE tio.
CONSTP.UCTION UCPX PROCEDURE W-WP-7 TITLE:.
F2V. li3 6
& DATE:
5/24/76 CONCRETE PLACING, CURING, FINISHING AND REPAlRS PROJECT TITLE:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY k 7.13 5 Care must be taken to minimize contact between vibrator and reinforcing steel.
Do not allow vibrator to contact reinforcing steel extending out of concrete that has reached a stage of Initial set, within five feet of the concrete.
Do not allow contact with forms o,f finished surfaces. -
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.
These areas shall be removed and replaced as directed by the Engineer.
7.14 Install horizontal and vertical construction joints as shown and detalled on the approved construction drawings.
.R-1 7.15 Remove wash water in manner to prevent it from running down and statning 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 fonder if required by Engineer before placing next lift.
The Interval may be shortened by the Engineer for certain locations.
8.0 CURING 8.1 Cure concrete by using water applied continuously to all exposed concrete.
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8.2 Assure ample water supply for continuous fine-mist spraying nr 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, obta'in Engineer approval of alternate method.
Other methods are covering with mulch, curing compounds and ponding as outlined in Reference 4.1.
R.I 8.5 The concrete shall be kept above 50 F in a moist condition for at least the 0
first' seven days af ter placing, except as follows:
8.5.1 High-early concrete shall be cured for at least the fir,st three days other period may be used if approved b.y Engineer.
8.5.2 concrete containing pozzolon shall be for not less than 14 days.
8.5.3 For curing during " hot" and " cold" weather conditions. refer to Reference 4.1.
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J. A..sts.3 CONSTRUCTION COMPANY PAGE 6 0F 10 PROCEDURE tio.
CONSTRUCTION t!OFX PROCEDURE W-WP-7 I'ITLg:.
REV. I;0 6
CONCRETE PLACING, CURING, FINISHING AND REPA4RS 5/24/76 -
PROJECT TITLE:
WATERFORD $ES UNIT N0. 3 CONTRACT NO. W3-NY-4 8.6 All equipment required for curing shall be on hand, checked out and re'ady 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 the concrete has attained sufficient strength to sustain the load.
8.8
' Instruct each worker in the Importance of not disturbing green concrete during its setting period.
Worker with duties on freshly placed concrete slabs shall wear wooden " slats" approximately 8 x 18 inches.
9.0 REPAIR unsatisfactory concrete phall be cut out and replaced with new concrete as soon as practicable after removal of forms.
9.1 provide anchors, keys or dovetall slots'by grinding and chipping to hold new meterial securely in place.
,a 9.2 Method of repair, matching of color, ouring and Engineer approval shall be performed per Reference 4.1.
A-3 9.3 The method of repair for all defective areas in concrete after stripping of forms, shall be detalled step-by-step on Concrete Pour Plan, Appendix C, and accompanied with a sketch, if required, to completely cover the method of repair and curing to meet the specification requirements.
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 f.Illing of holes lef t by form ties and rods.
10.2 Surfaces below grade which will receive Waterproofing shall be free of irregularltles which would in.terfere with proper application of the water,
.i proofing material.
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10.3 Surfaces which will be exposed when structure is in service will receive no special finish.
Repair damaged or defective concrete, remove fins 1/4' In height, and abrupt irregularities, fill holes lef t by form ties and rods.
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J. A" X.S CONSTRUCTICII COMPANY PACE 7 or 10 f
PROCEDURE No.
CatSTRUCTION Uolut PROCEDURE w-wp-7 i
l TITLE:-
REV. NO 6
[
CONCRETE Pl. ACING, CURING, FINISHING AND REPAIR $
& DAIE:
5/24/76 4
l PROJECT TITLE:
i WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 I
11.0 FINIS >llNG UNFORMED SURFACES 11.1 Surfaces exposed to the weatPo r which the approved construction drawings j
do not specify a horlaontal. surface or slope required shall be as follows:
1 11.1.1 Tops of narrow surfaces, such as stair treads, walls, curbs and parapets shall be sloped approximately 3/8" per foot of width.
I 11.1.2 Broad surfaces, such as walks, roads, parking areas and platforms I
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shall be sloped approximately 1/4" per foot of width, i
- 11.2 Screed and level all surfaces to be covered by backfill or concrete, subfloors j
to be covered with concrete topping, terrazzo or quarry tile and similar i
surfaces.
Surface irregularltles shall not exceed 1/4" higher or lower l
from the specified surfaces.
l 11.3 Surfaces that will not be covered' by backfill, concrete or tile topping i
shall be consolidated, gereeded and floated.
Perform floating by hand or machine.
Assure surface is free from screed rnarks or other Imperfecticas' and that surface Is uniform in texture.
Tool Joints and edges as shown on
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the approved construction drawings, i
11.4 Surfaces subjected to moderate or high velocities or water shall be screed
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to correct shape required by approved construction drawings, then floated l
with wood floats to secure a firm, uniform texture without raising excess fine meterial to the surface.
When surface has hardened sufficiently, it shall be brought to a unlform smoothness by using a steel trowel.
Steel
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trowel with a fim pressure to flatten the sandy texture and leave a dense, uniform surface free from trowel marks.
11.5 All concrete shall be protected against damage until final acceptance by I
the Engineer.
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R-I 11.6 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.
I2.0 f,,ggl1 All forms shall be built true to slopes, lines and dimensions.
.They shall be properly tied and braced to meintain correct position and shape until removed.
t 12.1 Form design and meterials shall be subject to the Engineer's review.
l 12.2. Form oils shall be approved by the Engineer and applied per Reference 4.1.
r 12.3 Chamfers and fillets shall be Installed per the approved construction drawins and Reference 4.1.
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J. A.
stlES CONSTRUCTION COMPANY PAGE 8 0F 10 l
i PROCEDunE h0.
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CQtt3TRUCTION UCRK FROCEDURE j
W-WP-7 IITLE -
REY. l'O 6
CONCRETE Pl. ACING, QURING, FINISNING AND REPAlR$
6 DATE:
5/24/76 l
I rit0 JECT TITLE:
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WATERFORO SES UNIT N0. 3 CONTRACT N0. W3-NY-k
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R-6 13.0 ADVER$t WEATHER CONDITIONS f
i 13.1 Rain Procedure i
1 In case rain occurs af ter concrete placement has cormanced, J. A. Jones
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Construction Company will take the followin'g actiott:
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A.
Install weatherproof covering or prefabricated rain sheds over the
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pour using cables, pipe columns, angleg iron and fire resistant pro-testion.
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4 B.
Continue pouring, In steps in accordance with pour plan.
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C.
Concrete to be placed pushing the water ahead of placement until water l
l can be collected and removed by vacuum, pumps, or through drain holes i
installed in the forms.
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. Wet concrete to be vibrated prior to placement of new concrete and new concrete then vibrated.
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R-6 13 2 Cold Weather Procedure
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The night before the scheduled pour date, cover entire fomed placement area with fire-retardant, polyethylene sheeting to protect against frost.,
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After placement is made, attach fire-retardant, polyethylene sheeting from I
entended top layer of reber and drape to bottom of excavation approximately l
6 inches outside forms on each exposed. side of the placement.
Suspend a-cable framework from local well dowels (if well dowels not convenient, then en extra long strongback or temporary angle Iron can be Installed) outlining 4
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finish area of placement being mode.
' Completely cover area over suspended j
cables with fire-retardant, polyethylene sheeting and drape to the top of 2
formwork, enclosing the entire placement area.
4 1.
After finishing operation is complete and concrete has reached initial set, place 4 inches of sand over entire top face of placement area.
Orop the j
polyethylene sheeting suspended by cable to top of formwork 'and secure.
l Place sand on top of pplyethylene sheeting where It overlaps previous pours, j
completely protecting the sand from wind currents.
The polyethylene
(
protecting the outs' Je of the forms and the polyethylene over the surface
)
should remain in place as long as cold weather. conditions continue or for a i
minimum of ten days.
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Wen the ambient temperature is 40'F or below, the fire-retardant, polyethylene sheeting enclosing the placement shall be moved out to provide space for i
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electric redlant and kerosene heaters to be placed between the sheeting and l
forms.
Protect the sheeting from coming in cantact with the heaters.
j Thereby meintaining the ambignt temperature at 65'F or above.
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J. A.
>!ES ColiSTRUCTI0tt COMPMIY PACE 9 0F 10
' CO:!STRtlCTIO:( 110RX PROCIDt!RI W-WP-7 CTLEs.
FIV. 1.0 6
CONCRETE Pl. ACING, CURING. FINISHING AND REPAIR $
?PJ') JECT TITI21 VATERFORD SES UNIT NO. 3 CONTRACT NO. V3-NY k R-6 13 3 ' Hot Weather Procedure All slabs will be cured with water.
The top of all walls will be cured with wet burlap or wet sand.
Vertical bulkheads in walls, when stripped prior to normal cure time, will be cured with wet blirlap.
Wall forms will be left in place for the nonnal curing period, however, if the necessity arises to strip the walls before the normal curing period, they will be cured with wet burlap or approved curing compound.
Placing will be accomplished as'soon as possible and within the limits of the specifications.
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.The heights of Ilf ts In hot weather will be controlled, as necessary, to avoid any Initial or premature set, w
14.0 00CUMENTATION All Engineer approvals sha'Il be obtained and become a part of the final document record package and be turned over to the Engineer af ter each pour is completsd.
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 Fleid Superintendent shall sign off by the work activity including the date, time and drawing including the revision the work was perfomed 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. sign off until they have been corrected and checked.
The Jones' quality Verification inspector shall verify that the work has been completed and checked.
He then shall sign of f 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 Checkilst Record' g
shall become a part of the final document record package.
.- l 14.3 Af ter the Area Superintendent and quality Verification Supervisor has signed off the J. A. Jones " Concrete Pre-Placement Checklist Record' verifylng that Jones is ready to place concrete, the J. A. Jones Quality verification Super-visor shall be authorized to sign of f the Ebasco " Concrete Pre-Placement Checklist Record', Form QClP-6-l. Appendix B, in contractor column Inalcating I
J. A. Jones.ls ready to place concrete.
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2 5 CONSTRUCTIO:t CateANY PACE lo0F lo PRCCf. DURE tw.
CONSTRUCTIO:I IIORK FR0CIDtlRE y,yp,7 TITLES.
REV. !;0 6
& DATE 5/24/75 l
CONCRETE PLACING, CURING: FINISHING AND REPAIRS PROJECT TITLE:
l WATERFORD SES UNIT NO. 3 CONTRACT N0. W3-NY-4 i
I4.4 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 l
Ebasco " Con,: rete Pre-Placement Checklist Record" and it shall become a part of the final document record package which will be turned over to the i
Engineer af ter the placement.
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e WATEPJORD SES - WIT 3 CONCRETE PRE-PL\\CCIENT Cl!E0KLIST RECORD i
Locatient Elevations to Pour No.
Detailed Description 1
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l ITDg CM IRACTOR IN5?ECTOR l
DATI I
Sandblas t/ Green:ut/Toundation Treatmen!
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Forms (L'ne and Grade) i 31ockouts, Keys,1.'atarstop, etc.
Reinforcing Steel i
Anchor Ecles,'E=badded Steel Electrical Hochanical Final Clean-up 1
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Special Instructions:
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Approved for Placine Timo Date
- q. C. Representattve QCIP-6-1 APPENDIX 8 ll 0
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J. A. JONES CONSTRUCTION COMPANY APPENDIX C a !
W TERFORD SES U;11T NO. 3 CONCRETE POUR PLAN POUR NO.
ELEV.
TO EST, CUSIC YDS LOCATION v
N iE E
PLACING PROCEDURE:
e PLACING EQUIPMENT
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STAN08Y:
Vl3RATOR$
STAN00Y:
HOPPERS, TREM1ES:
FINISH REQUIRED:
CURING PROCEDURE:
MANPOWER:
STAN00Y:
Fleid. Engineer Aree Superintenaient teollty Assurance s
8 6
s APPENDIX 0 J. A. JONES CONSTRUCTION COMPANY WATERFORD SES UNIT NO. 3 JOB # 75-317 VIBRAT1NG SCHEDULE RATINGS OF VlBRATORS BY CUBIC YARDS PER HOUR AS SPECIFIED BY MANU RATINGS IN C.Y./ HOUR ACCORDING TO TIME VIBRATORS IN USE TYPE V f BRATOR i u u,,
i34 3 0,,
zu 1 3/4" Electric 18.0 13.5 9.0 4.5 1 7/8" Air 20.'o 15.0 10.0 5.0 2 1/2" Ai r 40.0 30.0 20.0 10.0 2 3/8" Electric 35.0 26.3 17.5 6.3 3 1/2" Air 40.0 30.0 20.0 10.0 NOTE:
Required number and type of vibrators to be determined by field depending on pour rate and percentage of time used.
6 6
0