ML20127C316
| ML20127C316 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 05/07/1976 |
| From: | J.A. JONES CONSTRUCTION CO. |
| To: | |
| Shared Package | |
| ML17198A241 | List:
|
| References | |
| FOIA-84-455 W-WP-7, NUDOCS 8506220195 | |
| Download: ML20127C316 (13) | |
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J. A. JONES CONSTRUCTION COMPANY CONSTRUCTION WORK PROCEDURE FOR -
CONCRETE PLACING, CURING, FINISHING AND REPAIRS WATERFORD SES UNIT NO.3 CONTRACT N0. W3-NY-4 ,
ENGINEERING QUALITY ASSURANCE CONSTRUCTION REV. DATE APPR0tED BY DATE % sAPPROVED BY DATE APPROVED BY DATE O // 21-1 5 n/k
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J. A. A:ES CONSTRUCTIO;f COMPMlY Pact I or 9 PROCEDURE h0. C0tISTRUCno:I tl0RK PRCCIOURE W-WP-7 IITLEs. REV. 10 5 l CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DATE: 5/7/76 ji PROJECT T'.T E:
, WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 ,
1.0 PURPOS$ . j
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To outiIne 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 ,.g ,
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 injuriot.s amounts of acid, alkall, salts, sediment or organic matter and shall not sontain more than 1000 ppm of dissolved solids and not more than 100 ppm
. chloride lon. ,
32 *Not Weather . Not weather is when the dry bulb temperature is above 85'F and is expected to go higher. .
, 33 Cold Weather Cold weather is when the dry bulb temperature is at or below 40*F and can be expected to fall lower.
- 4-5 3.4 C*ld J' Int *'
A cold joint is defined as an ' rea a In which previou' sly pl' aced concrete cannot be made monolitic with a successive layer due to loss of plasticity In the original layer, where concrete she 11 be considered plastic if a
- l 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. *
4.0 REFERENCES
-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". ,, ein. e
J. A. s0NES CONSTMCT10'l COMPANY FACE 2 0F 9 PROCEDURE NO. Cat 1STMCTION 170RK PROCEDURE W-WP-7 rITLE:. REV. 14 5 CONCRETE pl. ACING, CURING, FINISHING AND REPAlRS 8' M: 5/7/76 FROJECT TITII.:
, IATERFORO SES UNIT NO. 3 CONTRACT N0. W3-NY-4 50 RESPON5151LITIES ,
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 Subcontractors are responsible for forming, placing, curing, finishing, repairing and inspection of concrete as required by the approved drawings and specifications. 6.Q TRANSPORTATION A-1 6.1 ' Convey all concrete from 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.
g.4 6.2 Check time and number of drum rot,aticins af ter water has been added to the cement,and aggregate as deemed necessary. Concrete must be placed in
. forms within one (1), hour or 300 rotations of drun 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-l 6.4 Cleon all tools and equipment used in placing concrete before and after placement.
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 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 (sklp pans, wheel-barrows, earts, 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 when it is necessary to disassemble conveying equipment over the placement and the concrete would fall in excess of S'-0", the area shall be covered with plywood or other suitable material 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 be placed in the allowed time limit shall be removed from the placement area and discarded. suet
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i s J. A. JONES CONSTRUCn0N COMPAM PAGE 3 0F g PROCEDURE SQ. d consTRUCEON WORK PROCEDURE w.wp.7 REV NO 5 Im.E: CONCRETE PLACING, CURING, FINISHING AND REPAIRS 6 M: 5/7/76~ PROJECT n:LE: WATERFORD SES UNIT N0. 3 CONTRACT N0. W3-NY l+ 70 PLACING , R-1 7.1 Obtain Engineer review of equipment, layout, procedures and methods prior l to' placing concrete. l 72 Discharge concrete from mixer into center of bucket or hopper. This t l
.' principle of vertical discharge shall be used during all stages of i delivery. l 73 Deposit concrete as near as practicable to its final location.
- -When direct placement is not poss1ble, use suitable chutes and l l
" elephant trunks" to confine concrete movement. Do not allow !
' concrete to flow in a menner that will cause segregation. .
7.4 use a central-bottom-dump bucket that provides positive regulation of amount and rate of deposit in all dumping positions.
- i 7.5 When placing concrete with bucket, spot bucket over exact location, t then lower to Just clear the concrete already in place, with bucket l
open. The unconfined height must not be more than five (5)
- feet unless approved by Engineer. Do not dump bucket while
- swinging or in any menner that will cause separation or disturb
[ previously placed concrete. i 1 7.6 in restricted areas, place concrete in forms using barrow, buggles, cars or hand shoveling. Take care not to allow vertical drop of ! ever five (5) feet. i R-1 77 Slope on chutes shall not be flatter than I to 3 and not steeper than . I to 2. - I . . R-1 7.8 Aluminum or galvanized steel pipe will not be used to convey concrete. ; t i R-1 7.9 Obtain Engineer inspection of cleenliness prior to placing concrete. ; l i j 7 10 Remove all surface water from foms, embeds, resteel, and adj,olning concrete.
-No concrete will be placed on a water covered surf ace. e
! 7.11 Place concrete in successive 6 to to inch thick hortrontal layers. Correct j tendency to segregate by shoveling stones into mortar. I i 7.12 Bedding planes shall be approximately horizontal, except in dams or other I' 1 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 i i upstream direction in which case the placement shall proceed in an upslope
, -direction. -
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---..-l J. A. . ,NES CONSTRUCTION ColeANY .
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- PROCEDURE NO.
CCRISTRUCTION 110RK PROCEDURE , W-Wp-7
- IITLEs. REV. NO 5 l CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DATE
- 5/7/76 .
PROJECT TIT!J.: i . nATERFORO SES UNIT N0. 3 CONTRACT NO. W3-NY-4 . 1 I 7.13 . Compact concrete with mechanical vibrating equipment until the concrete I has been consolidated to the maximum density, free of pockets or coarse aggregate, and fits tight against forms and embed material. . . Use vibrators of the high-frequency type with not less thest E 7.13.1 } 6000 revolutions per minute,'to properly consolidate 'the concrete. * , l
, 7.13 2 Insert vibrators approximately every 2
- feet .in the vertical position. l'
} Remove vibrator slowly to avoid creating pockets.
- Do not use , ,
l vibrators to transport the concrete. .
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7.13.3 Use vlbrators to blend and meld now layer with previously placed l layer. Care must be taken to assure adequate vibration,
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i 7.13.4 Insu. < lbrator penetrates the layer bel'ng placed and also the .- , i i layer below while it is still plastic to provide good bond between ! the two layers and prevent the formation'of cold jointr.. 7'.13.4.1 should the placement of concrete be curtailed f'or any reason R- 5 * . or if the pleolng gets ou,t of sequence, the minimum thickness >
. requirements for successive horizontal layers in Paragraph 7.11-no: Longer ' apply. Keep the entl're exposed surface not topped j
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- - - .out, covered.wlth f resh' horizontal layers.of concrete as . thick * !
i as the supply will allow and keep vibrated. R-5 -
. 713.4.2. It the possibility of a cold joint ext,st, test the surface with' a' blunt end rod. if the rod can be Insertad into the .
concrete only 2 or 3 Inches, test the concrete by. the method l described in Paragraph 3.4 'above. By this method, if It is ;
. determined that a cold joint exl,st, stop work innediately. In area of cold joint. ,
i 7 13.4.3 If after. work stop'page In placement','soncrete is so green that i R-5 it.can readily be dug out with a hand pick, then'no treatment shall be required, provided any laitance is removed, the surface j roughened, loose material removed and 'the surfaces are kept moist; the concrete shall be placed against the surfaces and ,
.- thoroughly and systematical,1y vibrated over the concrete area '
adjacent to the older concrete. '
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, A A. JNES COETRUCTION CNfrA7f. - . -1.' ACE 5 0F 9
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PnOCEDURE NO. ' CONSTRUCTION L'ORK hROCIDURE ' r .*' . 2 --
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TITLE:- i1 .m -.' EEv. No 5 CONCRETE PLAClNd'," CURING, FINISH INK ANC REPAIRC ' & DATE: 5/7/76 s . . .
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PROJECT TI'U.E: , 4
- WATERFORD SES UNIT NO. 3 CONTPACT)c. W3-NY-4 ,
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R-5 , o ; 7..lQ.42 In placements l when the concrete is not green, as described o 'IM-the proceeding paragraph, the surface shall be roughened
. and cleaned of any Jaltance and loose material, and coated
/ ',_ with Sika-HI-Mod Epoxy or approved ~ equal and the fresh-concrete thorotghly vibratad beside the affected area, in all cases where epoxy is used, the manufacturer's instructions,
, particularly as regneds time limits, shall be followed. in
' all . cases, surfcces 55sil be kept moist after cleaning until
/ concrete..is placeld. ,. ,s 3
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7.13.5 Care must be takan ito' minimize contact between vibrator and j reinforcing steel. Do not allow vibrator .to contact reinforcing steel. extending out of concrete that has reached a stage of initial
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Do not allow conta-t set, within five (5) feet of the concrete. i with forms.of finished surfaen.
, j ! , 7.13.6 Obtain Engineer approval before usind'anf fann attached2 /ibrators.
q- . 7.13 7 Obtain Engineer approval prior'to Using any surface vibrators. -
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- 7. In8 All .araas of stone pockets and mortar' pondage is unacceptable.
Thew areas shall be removed and replaced as d!rected'by' the Eng!rser. B ~ , m . M' - x
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7 14 Install horizcntal ahd vertir.al construction Joints as shown end.detisited 1 s.
', n o the appro.4d constructice drawings.
,x R-1 "7.15 .7ecove wash water Ir/ manner to prevent it f rom running down and staining exposed faces. Shc.old stalteing oscur, It shall be remssed. '
a .'N P , , 7.16 in multiphi lift placen.gne, allow each placement to set 48 hours or longer If requirt'd 6 Engineer'before placing next .lif t. The Interval niay be shortened by, thy l gineer for cert. sin locations. - - -
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OES CUi;UTRUCTI0tt CC:!PA:1Y ' J . A. PACE 6 OE 9 UnucEDUE hu. CU**STRUCTION 1101'd PI:UCEDUME , y,gp uv. r;o TITLE: 5 CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DATE: 5/7/76 PROJECT TITLE. WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 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 sprittkling. Obtain certification from Engineer for water supplied for curing. Water 8.3 shall meet requirement in Paragraph 3.1 of this proce. dure. 8.4 If water curing cannot be used, obtain Engineer apprqval oY alternate Other methods are covering with mulch, curing compounds and
- method.
ponding as outlined in Reference l+.l. l R-1 8.5 The concrete shall be kept above SQ 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. I i 8.5 3 For curing during " hot" and " cold' weather conditions refer to Reference 4.1.
' 8.6 All equipment required for curing shall be on hand, checked out and 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 the concrete -has attained sufficient strength to sustain the load. 8.8 Instruct each worker in the importance of not disturbin5 green concrete during its setting period. Worker with dLities on freshly placed concrete slabs shall wear wooden " slats" approximately 8 x 18 inches. . 9.0 REPAlR Unsatisfactory concrete shall be cut out and replaced with new concrete as soon as practicable af ter removal of forms.
, 9.1 Provide anchors, keys or dovetail slots by grinding and chipping to hold l ,
new material securely in place, i ! Method of repair, matching of color, curing and Engineer approval shall 9.2 , !' be performed per reference 4.1. R-3 , 9.3 The method of repair for all defective areas in concrete after stripping of forms, shall be detailed step-by-step on Concrete Pour Plan, Appendix C,
. and accompanied with a sketch, if required, to completely cover the
. method. of _ tepa i t..and _.cutJES,.to mc.tt. the_.spp.q l. fica t_lg)..requ_i_reme!1t,s. ,,,,,
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. J. A.' '12:!;** CO.'.UTl UCTIO:1 CD:LL'N!Y PACC7 OF 9 PluJCEDULE hu.
l CO:.".;TP.U "! ION UUI'd l't:UCEDUL'S w_yp_7 nTLE: P2v.1:0 5 i CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DATE: I 5/7/76 PI:DJECT TITLE: WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 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 appl.ication of the waterproofing material. ,
10.3 Surfaces which will be exposed when structu're is in service will receive no special finish. Repair damaged or defective concrete, remove fins S' in height, and abrupt irregularities, fill holes left by form ties and rods. . 11.0 FINISHING UNFORMED SURFACES , 11.1 Surfaces exposed to the weather which the approved construc'tlon drawings
- do not specify a horizontal surface or slope required shall be as follows.:
-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. .
11.1.2 Broad surfaces, such as walks, roads, parking areas and platforms shall be sloped approximately M' per foot of width. O . I 4 e *
, J. ' JONES CO?iSTRUCTION COMPM PACE 8 0F g PROCEDURE NO.
CUSTRUCTION WORK PROCEDURE W-WP-7 IITLE: ' REv. no 5
' CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DATE: 5/7/76 PROJECT TITLE:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 11.2 Screed and level all surfaces to be covered by ba'ckfill pr concrete, sub-floors to be covered with concrete topping, terrazzo or quarry tile and similar surfaces. Surface irregularities shall not exceed 6" higher or. 1ower from the specified surfaces. , 11 3 Surfaces that will not be covered by backfill, concrete or tile to'pping shall be consolidated, screeded and floated. Perform floating by hand or machine. Assure surface is free from screed marlis or other imperfection and that surface is uniform in texture. Tool joints and edges as shown on the approved construction drawings. 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 a dense, uniform surface free from trowel marks. 11.5 All concrete shall be protected against damage until final acceptance by the Engineer. R-1 g 15.'6 Use special care in the finishing of floor areas of offices, shops, assembl-rooms and other areas where appearance is important. Special floor finisher 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 oils shall. be approved by the Engineer and applied per Reference 4.1. 12.3 Chamfers and fillets shall be installed per the approved construction drawing and Reference 4.1. 12.4 Forms shall remain in place for time specifi,ed in Reference 4.1. 13 0 ADVERSE WEATHER CONDITIONS All concrete placed in hot or cold adverse weather conditions shall be placed in accordance with Paragraph 8 of Reference 4.1. i i
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J. A. JONES CONSTRUCTION COMPANY PAGE 9 0F 9 PROCEDURE S0. CONSTRUC ION WORK PROCEDURE W-WP-7 TITLE: REV. NO 5 CONCRETE PLACING, CURING, FINISHING AND REPAIRS & DATE: -5/7/76 PROJECT 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 Engi.neer af ter'each pour is completed.
14.1 All work relating to each pour shall be completed, c,hecked 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 Checkl.ist 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 thy w. . cate, 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, th.e Jones Field Engineer shall not sJgn' off until they have been corrected and checked. The Jones Qgality 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 Qgalit.y 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 Record" shall become a part of the final document record package.
i R-1 14.3 After 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-Placenent 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 after the placement. , I i I : I l 0 _-..-_..,,.-,_._m.c__,-_____._.,_.,_._.__.m, . .__ _ . , . . , , _ . _ _ _ - , m. . . . . . - - _ . - ~ _ _ . - - - _ _ - . . . _
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- Appendia A W-WP-7 9
l Bull 9110G _ J. A. JOIIES CONSTituCT1011 COMPRNV POUR IIO. j SCH. POUR DATE W4TERFORS UNIT NO. 3 ELEV. 6
, ACTUAL POUR b4TE . REQ'D HlX CONCRETE PRE-PLACEMENT CHECKLl$T RECORD i, /
l , C04PLETED AND 1N5PEfTE9 , , J. A. JONES SUPERVISION J. A. JONES ENGINEER QUALITY VERIFICRTION REMARR$ ! Itemo Date ' Time Per Swa & Rev, Name Date Time Per Dwe s Rev. Ilame Date Time Per Dwe s Rev l
- 1. CONCRETE .
I a. Sandblast
- b. Greencut
! c. Treatment E. FORMS
- a. Olmension [
- b. Line & Grade
- c. Clean .
"j d. Tleht t
i e. Oraced
- f. Coating i q. Chamfer Strips j h. Key W'ys a
- l. 81ock Outs J. Whalers &
1' St rongback s *
- k. Waterstop A I 1. Release Agent
- 5. REINFORCONG
- e. Rar Quantitles
{ b. Specing
- c. Elevation
- d. Cadweld Mapping ,
- b. EM6EDS ,
- a. Quantity
) ,
- b. Line & Grade
- c. Elevation
- d. Identification j j 5. GENE RAL
- e. Cleanliness ,
- b. Instrumentation ,
- c. Weather Protection
- APPROVED AREA SUPERINTElIDENT ORTE APPROVED Q. V. SUPERVISOR 041E
WATERFORD SES - UNIT 3 i I CONCRETE PRE-PL\CDLENT CHECKLIST RECORD 1 l . Location: Elevation: to Pour No. - 4 Detailed
Description:
i n i ITEM CM TRACTOR INSPECTOR l eAn -- nu. ; j , Sandblas t/Greeneut/ Foundation Treatment. . Forms (L'ne i and Grade) * ' Blockouts, Keys, Waterstop, etc. , Reinforcing Steel
- l Anchor Bolts," Embedded Steel - **
l Electrical ,- Hechanical , 1 . .; Final Clean-up 1 } . t Special Instructions:
- 4 1, t i
1 Approved for Placinn Time Date Q. C. Repecsentative
! QCIP-6-1 APPENDIX B + -
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75-3I7 .
- J. A. JONES Co* 'RUCTION C. .#ANy A "ENDIX C WATERFORC 4 UNIT 3 1
CONCRETE POUR PLAN e Lasation Elev. To i Pour No. Pour Date Est. Cubic Yards
) - .
J\ du l E * . s I Placing Egulpment l l 4 -
- ribrators I
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. . . . esppers, Tramles
. Bereeds, Screed Rods l
( - Fleishing Tools, bullficats. Tromel Mech., etc. bring Egvipet. Sand Moses Sprinklers
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.Appliceb.e Dwgs Rev. Applicable Dugs Rev.
y' I
, Fleid Engineer.
Aree Sgt.
, Quellty Assurance l
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