ML20127C269

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Rev 2 to Const Work Procedure W-WP-7, Concrete Placing, Curing,Finishing & Repairs
ML20127C269
Person / Time
Site: Waterford Entergy icon.png
Issue date: 12/18/1975
From:
J.A. JONES CONSTRUCTION CO.
To:
Shared Package
ML17198A241 List: ... further results
References
FOIA-84-455 W-WP-7, NUDOCS 8506220182
Download: ML20127C269 (11)
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CONCRETE PLAC NG, CURING, FINISHING AND REPAIRS W/"ERFORD SES UNIT NO.3

0NTRACT NO. W3-NY-4 ,

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J. 4 JONES CONSTRUCTION COMPANY PACE 1 OF 8 PROCEDUPS. 30.

CONSTRUCTION WORK PROCEDURE IITLE: REV. m 2 CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DAIE: 12/18/75 PROJECT 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 This procedure includes the requirements to be used by J. 'A. Jones and their Subcontractors to comply with approved construction drawings and specifications.

30 DEFINITIONS 31 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 h'.gher.

3.3 Cold E.ather l Cold weather is when the dry bulb temperature is at or below 40 0F and can be expected to fall lower.

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4.0 REFERENCES

1 i R-1 4.1 Ebasco Services, Inc. Specification L00-1564.472, Section ti, latest revision l " Concrete Placement, Curing and Finishing". ,

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  • 4.2 , J. A. Jones Procedure, W-SITP-7, " Concrete Placing, Curing, Finishing and i

Repelr inspection".

5.0 RESPONSIBILITIES ,

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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.

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l J. A. J0!f.S CONSTRUCTION COMPANY PAGE 2 OF 8 PROCEDURE. NO.

CONSTRUCTION WORK PROCEDURE y.yp.7 TITLE: REV. NO 2 CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DATE: 12/18/75 PROJECT TITLE: . l WATERFORD SES UNIT NO. 3 CONTRACT N0. W3-NY-4 5.2 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-l 6.1 Convey 'all concrete f rom mixer to place of final deposit 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 after water has been added to the cement and aggregate. Concrete inust be placed In forms within one (1)

. hour or 300 rotations of drum whichever one occurs first, unless '

authorized by the Engineer and then time must not exceed one and ..

one-half (li) hours. .

R-1 6.3 Water shall be added only by the Engineer.

R-1 6.4 Clean all tools and equipment used in placing. concrete before and af ter placement. ,

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~s R-2 6.5 At any time it 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 f rom 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 pens, 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.

i 6.5.2 when it is necessary to disassemble conveying equipment over the placement and the concrete old fall In excess of 5'-0", the i area shall be covered with olywood or other suitable material l to catch the concrete and prevent it from falling into the placement. Concrete that has fallen in excess of 5'-0" or handled in any other detrimental method or that cannot i be placed in the allowed time Ilmlt shall be removed from the placement area and discarded.

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J. A. JONES CONSTRUCTION COMPANY Pact 3 0F 8 t

PROCEDURE NO.

CONSTRUCTION WORK PROCEDURE w.wp.7 TITLE: REV. E0 2 CONCRETE Pl. ACING, CURING. FINISHING AND REPAIRS & DATE: 12/18/75 PROJECT TITLE:

WATERFORD SES UNIT NO, 3 CONTRACT NO. W3-NY-4 i

70  ?,MS.El R-1 7.1 Obtain Engineer review of equipment, layout, procedures and methody prior ,

to placing concrete.

7.2 Discharge concrete from mixer into center of bucket or hopper. This

. principle of vertical discharge shall be used during all stages of delivery.

! 7.3 Deposit concrete as near as practicable to its final location.

i When direct placement is not poss1ble, use suitable chutes and

" elephant trunks" to confine concrete movement. Do not allow concrete to flow in a manner that will cause segregation.

7.4 Use a central-bottom-dump bucket that provides positive regulation I

. of amount and rate of deposit in all dumping positions.. -

7.5 When placing concrete with buciset, spot bucket over exact location, then lower to Just clear the concrete already in place, with bucket open. The unponfined height must not be more than five (5) feet unless approved by' Engineer. Do not dump bucket while i swinging or in any manner that will cause separation or disturb previously placed concrete.

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'. J. . JONES CONSTRIJCTION COMPANY FAGE 4. OF 8

  • . PROCEDURZ NO.

) CONSTRUCTION WORK PROCIDURE ,

RZV. No 2 IITLE: & DATE. 12/18/75 CONCRETE PLACING, CURING, FINISHING AND REPAlRS PROJECT TITLE:

WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 7.6 in restricted areas place concrete in forms ustng barrow, buggles, cars or hand shoveling. Take care not to allow vertical drop of over five (5) feet.

R-1 77 Slope on chutes shall not be flatter than I to 3 and not steepe'r than 1 to R-1 7.8 , A1uitnum or galvanized steel pipe will not be used to convey concrete.

R-1 79 obtain Engineer Inspection of cleanliness prior to placing concrete.

7 10 RemoveNo att surface water from fones, embeds, resteel, and adjoining con-concrete will be p1' aced on a water covered surface.

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7[11 Place concrete in successive 6 to 20 Inch thick horizontal layers. .-correct

. tendency to segregate by shoveling stones into mortar.

7 12 sedding planes shall be approximately horizontal, except in dans or.'other

' structures where it may be required to incline the beds. Without forms, 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 upslope 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.

7131 use vibrators of the high-frequency type with not less than 6000 revolutions per minute, to properly consolidate the concrete.

Insert vibrators approximately every 2 feet in the vertical positt 7132 Remove vibrator slowly to avoid creating pockets. Do not use vibrators to transport the concrete. ,

7133 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 betweet 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 stes extending out of concrete that has reached a stage of Initial set within five (5) feet of the concrete. Do not allow contact with forms of finished surfaces.

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- J. n. JONES CONSTFECTION COMPANY PAGE 5 0F S PROCEDU32 0.0.

CONSTFIC'" ION UORK PRCOEDURE p TITLE: F2V.1:0 2 CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DATE: 12/18/75 PROJECT TITLE:

WATERFORS SES UNIT NO. 3 CONTRACT NO. V3-NY-4 7136 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.

i 7 14 Install horizontal and vertical construction joints as shown and detailed on the approved construction drawings.

A-1 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 lift 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 be shortened by the Engineer for certain locations.

< 8.0 CURING

, 8.1 Cure concrete 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 F in a moist condition for at least I 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 containing 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. j l i g

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J. A. JONES CONSTRUCn0N COMPANY PAGE 6

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l PROCEDURE 60. ,

i CONSTRCOMON tl0RK PROCEDURE W-WP-7 .

REV. NC 2 .

nTLE:

& DATE* 12/18/75 i CONCRETE PLACING, CURING, FINISHING AND REPAIRS

! PROJECT U TLE:

! WATERFORD SES UNIT N0. 3 CONTRACT NO. W3-NY-4 i

- 8.6 All equipment required for curing shall be on hand. checked out and ready i for use prior to placing concrete.  ;

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I 8.7 Fresh concrete shall be protected by leaving forms in place as rdquired.  ;

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 i slabs shall wear wooden "sists" approximately 8 x 18 inches.

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90 REPAIR Unsatisfac" tory concrete shall be cut out and replaced with new concrete as soon j as practicable af,ter removal of forms. ,

t Provide anchors, keys or dovetall slots by grinding and chipping to hold 3

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new meterial securely in place. ,

j 32 Method of repair, matching of color, curing and Engineer approval shall

  • j . be performed per Reference 4.1.
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j 10.0 FINISHING FORMED SURFACES 10.1 No finishing Is required for formed surfaces against which backfill or ,

1 concrete is to be placed, except repair of defective areas and filling of ~

holes left by form ties and rods.

l 10.2 Surfaces below grade which will receive waterproofing shall be free of i Irregularltles which would Interfere 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 &"

In height, and abrupt irregularltles, fill holes lef t by form ties and rods. ,

11.0 FINISHING UNFORMED SURFACES , f 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:  ;

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11.1.1 Tops of narrow surfaces, such as stalr treads, walls, curbs and perspets shall be sloped approximately 3/8" per foot of width. -

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11.1.2 Broad surfaces, such as walks, roads, parking areas and platforms  ;

i i shall be sloped approximately 4" per foot of width.  ;

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J. .. JONES CONSTRUCTION COMPANY PAGE 7 OP 8

' PROCEDU?2 h0.

CONSTRUC'" ION WORK PRCCEDURE y,yp,7 TITLE: PEV. 50 2 C'ONCRETE PLACING. CURING, FINISHING AND REPAIRS & DATE: 12/18/75 PROJECT TITLE:

WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 11.2 Screed and level all surfaces to be covered by ba' c kfill pr concrete, sub-floors to be covered with concrete topping, terrazzo or quarry tile and similar surfaces. Surface irregularities shall not exceed &" 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 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.

  • 4 11.4 Surfaces subjected to moderate or high 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 4 dense, uniform surface free from trowel marks.

11.5 ,All concrete shall be protected against damage until final acceptance by the Engineer.

R-1 11.1 Use speclat care in the finishing of floor areas of offices, shops, assembli rooms and other areas where appearance is important. Special floor finishet shall be in accordance with Reference 4.1.

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.

R-1 12.1 Form design and materials shall be subject to the Engineer's review.

12.2 Form olls 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 speelfled.In Reference 4.1.

13 0 ADVER$E WEATHER CONDITIONS All concrete placed in hot or cold adverse weather conditions shall be placed in accordance with Paragraph 8 of Reference 4.l. ,

J. . JONES CONSTRUCTION COMPANY PAcg8 or 8 PROCEDURE ;0.

CONSTRUOTION WORK P300EDURE ,

IITLE: REV. I:0 2 CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DATE: 12/18/75 PROJECT TITLE:

WATERFORD SES UNIT N0. 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 our to the Engineer af ter'each 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-Placemen.t 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 Veriff-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 hell be merked N/A. When all' work, checking and verification has been cor o eted, the Area Superintendent and the Area Quality Verificatter Supervisor m il 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 Record" 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 Prg-Placement Checklist Record" and it shall become a part of the final document record package which will be turned over to the Engineer after the placement. ,

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WATERFORD SES - UNIT 3 CONCRETE PRE-PLACDLENT CHECRLIST RECora

Location:

Elevation: to Pour No.

Detailed

Description:

___s ITIN CG TRACTOR INSFECTOR l DATE Data ;

, . Sandblast /Greeneut/ Foundation Treatment ,,

Forma (L'ine and Grade)

Blockouts, Keys, Waterstop, etc. ,

Reinforcing Steel Anchor Bolts.' Embedded Steel Electrical .

Hechanical Final Clean-up

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Special Instructions r

Approved for Placinr.

Time Date Q. C. Representative s

QCIP 6 1 -

APPEN0lX 8 .

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