ML20127C310
| ML20127C310 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 04/30/1976 |
| From: | J.A. JONES CONSTRUCTION CO. |
| To: | |
| Shared Package | |
| ML17198A241 | List:
|
| References | |
| FOIA-84-455 W-WP-7, NUDOCS 8506220193 | |
| Download: ML20127C310 (12) | |
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),yp ggf gg h J. A. JONES CONSTRUCTION COMPANY CONSTRUCTICM WORK PP.:CEDURE b & II 8 Afo-23 FOR CONCRETE PLACING, CURING, FINISHING AND REPAIRS
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WATERFORD SES UNIT NO.3 CONTRACT NO. W3-NY-4 ENGINEERING QUALITY ASSURANCE CONSTRUCTICN
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MES CONSTPJ.!0 TION COMPANY PACE 10F 8 i
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ONSTRUCTION !.'0Fa*. PROCI.DUFI W-WP,,,
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- 4/30/76 CONCRETE PLACING, CURING, FINISHING AND REPAIRS I
?ROJI.CT IIII2:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 1.0 PURPOSE To outiine methods used by J. A. Jones and Subcontractors to place, cure, finish and repair concrete.
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. 2. 0 SCOPE This procedure includes the requirements to be used by J. 'A. Jones and their Subcontractors to comply with. approved construc, tion drawings and specifications.
3 0 DEFINITIONS
,a 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 l
amounts of acid, alkali, salts, sediment or organic matter and shall no.t I
..contain more than 1000 ppm of dissolved solids and not more than 100 ppm chloride ion.
32 ' Hot Weather Hot weather is when the dry bulb temperature is above 85*F and is expected to go higher.
l 3.3 Cold Weather 0
i Cold weather is when the dry bulb temperature is at or below 40 F and can be expected to fall lower.
4.0 REFERENCES
R,-1 4.1 Ebasco Services, Inc. Specification LOU-1564.472,Section II, latest reviste
" Concrete Placement, Curing and Finishing".
4.2
.!. A. Jones Procedure, W-SITP-7, " Concrete Placing, Curing, Finishing and Repair inspection".
50 RE5FGdSIBILITIES s
5.1 Ebasco Services, Inc. Is responsible for furnishing all materials, receivin<
Inspection, testing and documentation of such test as required by Reference 4.1 to support J. A. Jones and their Subcontractors in performing their.or' '
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.s J. A. JONES CONSTRUCTION COMPIM Pt.GE 2 0F 8 PROCEDURE No.
CCNSTRUCTION WORK PROCEDURE y,qp,7 EEV. UO 4
TITLE:
& DATE: 4/30/76 i
CONCRETE PLACING, CURING, FINISHIMG AND REPAIRS PROJECT T;!LI:
W/.TERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 J. A. Jones and their Subcontractors are responsible for forming, placing, 5.2 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 deposit in bucket, con-tainer or conveyors to assure required consistency and plasticity without segregation or loss of. slump be' yond limits of spesification.
M R-4 6.2 Check time and number of_ drum rotations after water has been added to the I
asTemiifniciss7rb Concrete must be placed in cement and aggregate f' bur or 3OO rotations of drum whichever one occurs forms within one (1) h first, unless authorized by the Engineer,and then time must not exceed i
l one and one-half (ii) hours.
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R-1 6.3 Water 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 af ter placement.
R-2 6.5*
At any time it becomes necessary to break down concrete conveying equipment j
for cleaning or repair during a placing operation, care shall be taken j
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 ' 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'-&' 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 5'-7', the area shall be covered with plywooo or other suitable materici to catch the concrete and prevent i t from falling into the piacement.
Concraie that has falica in excess of 5'-0" or handled in any other detrimental method or that canno't be placed in the allowed time limit shall be removed from the placement area and discarded.
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- J. A. Ju 2S CONSTRUCTION COMP M PACE 3 0F 8 2KGGIU3 50.
w.wp.7 CCNSTRUCTICU UOFX PROCIDURI I
RIV. No 4
IITI.I:
& DAIE: 4/30/76 CONCRETE PLACIMG, CURING, FINISHING AND REPAIRS
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PROJECT TITLE:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 s -
7.0 PLAC ING Obtain Engineer review o# equipeent, layout, procedures and methody prior R-l 7.1 to placing concrete.
This Discharge concrete from mixer into center of bucket or hopper.
7.2
. principle of vertical discharge shall be used during' all stages of delivery.
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"7. 3 Deposit concrete as near as practicable to its final location.
I When direct placement is not poss1ble, use suitable chutes and Do not allow g
" elephant trunks" to confine concrete movement.
- concrete to flow in a manner that will cause' segregation.
i 7.4 use a central-bottom-dump bucket that provides positive regulation of amount and rate of deposit in all d. umping positions.
When placing concrete with bucket, spot bucket over exact location, 7.5 then lower to just clear the concrete already in place, with bucket The unconfined height must not be more than five (5) open.
feet unless approved by Eng.ineer.
Do not dump bucket while swinging or in any manner that will cause separation or disturb previously placed concrete.
7.6 in restricted 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 steeper than I to 2.
R-1 7.8 Aluminum or galvanized steel pipe will not be used to convey concrete.
R-1 7.9 Obtain Engineer inspection of cleanliness prior to placing concrete.
7.10 Remove all surface water f rom forms, e. beds, resteel, and adjoining concrete.
No concrete will be placed on a water covered surface.
7 11 Place concrete in successive 6 to 20 Inch thick horizontal layers.
Correct tendency to segregate by shoveling stones into mortar.
7.12 eedding planes shall be approximately horizontal, except in dams or other structures where it may ce requirce to incline the beds.
Without f e r.- c.
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, e#
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,J. A.,.**"C CON'JT!!UCTION CC'IPN1Y PACC 4 0F 8 PRUCEDUKE hv.
CO *ST"UC'" ION UUI'd l'uUCCUU".C
.W.WP.7 KEV. NO 4 TITI.E:
CONCRETE PLACING, CURING, FINISHING AND REPAIRS
& DAIE: 4/30/76 PROJECT TITLE:
WATERFORD SES UNIT NO. 3 CONTRACT NO. V3-NY-4 7.13 Compact concrete with mechanical vlbrating 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.
7.13.I Use vibrators of the high-frequency type with not less thad 6000 revolutions per minute, to properly consolidate the concrete.
7 13.2 ' Insert vibrators approximately every 2 feet.in the vertical position.
Remove vibrator slowly to avoid creating pockets.
Do not use vibrators to transport the concrete.
7 13 3 use vibrators to blend and meld now layer with previously placed layer.
Care must be taken to assure adequate vibration.
7.13.4 Insu're 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 vibrater 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 (5) feet of the concrete.
Do not allow contact with forms of finished surfaces.
7.13.6 Cbtain Engineer approval before using any form attached vibrators.
7.13 7 Obtain Engineer approval prior to using any surface vibrators.
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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.
e 7 14 install horizontal and vertical construction joints as shown and detailed on the approved construction drawings.
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'R-1 7 15 Remove wash water in 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 recuired by Engineer before placing next lift.
The interval may be shortened by the Engineer for certain locations.
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Cc::3 nUCTION 110C P!:UC"DU'U.:
y,ypg REV. ti,0 4
l TITLC:
CONCRETE PLACING, CURING, FINISHING AND REPAIRS
& DATE: 4/30/76 Un0 JECT TITLE:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-NY-4 8.0 C"* LNG '
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 spriekling.
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 apprqval oY alternate method.
Other methods are covering with mulch, curing compounds and
.ponding as outlined in Reference h.l.
t-1 8.5 The concrete shall be kept above 50 F in a moist condition for at least
- the*first seven (7) days after placing, except as follows:
I 8.5.1 High-early concrete shall be cured for at* least the first three (3'),
I days, other. period any 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
. Reference 4.1.
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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.
i 8.8 instruct each worker in the importance of not disturbing green concrete l
during its setting period.
Worker with duties on freshly placed concrete slabs shall wear wooden " slats" approximately 8 x 18 inches.
l 9.0 REPAIR Unsatisfactory' concrete shall be cut cut and replaced with new concrete as soon as practicable af ter removal of forms.
, 9.1 Provide anchors, keys or dovetall slots by grinding and chipping to noio 1
new material securely in place.
9.2 Method of repair, matching of color, curing and Engineer approval shall J
l' be performed per reference 4.1.
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9.3 The method of repair for all defective areas in concrete after stripping
,of forms, shall be detailed stcp-by-step on Concretc Pour Plan, Arpendix C.
. and accompanied with a sketch, if required, to completely cover the j
....sethod. of rapal e and.cucirs;to meat. the ws.t.ltigatJ90..re. qui,r,ms.
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1 CONCRETE PLACING, CURING, FINISHING AND REPAIP.S (a DICE: 1./30/76 rnOJECT TITLE:
WATERFORD SES UNIT NO. 3 CONTRACT N0. W3-NY-4 10.0 FINISHf*!G F0 MED SURFACTS i
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 lef t 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 waterproofing material.
I 10.3 Surfaces which will be exposed when structure is in service will receive no special finish.
Repair damaged or defective concrete, remove fins k' in height, and abrupt irregularities, fill holes lef t by form ties and rods.
s 11.0 FINISHING UNFORMED SURFACES 11.1 Surfaces exposed to the weather which the approved construc' tion 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 parapets shall be sloped approximately 3/8" per foot of width.
J1.1.2 Broad surfaces, such as walks, roads, parking areas and platforms shall be sloped approximately t' per foot of width.
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J. A. "TES CONSTF1'CTION COMP 5NY PACE 7 OF 8 PROCF.:P.JF2 I.G.
t CONSTF.UCIO:t WOFX FRCCIDU?2 g,yp,7 F2V. No %
IIT!i:
N3N CONCRETE PLACING, CURING, FINISHING AND REPAIRS
?ROTCT TI""2:
WATERFORD SES UNIT NO. 3 CONTRACT NO. W3-Ny-4 Screed and level all surfaces to be covered by bickfill or concrete, sub-11.2 floors to be covered with concrete topping, terrazzo or quarry tile and similar surfaces.
Surface irregularities shall not exceed i" 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 Assure surface is free from screed marks or other imperfection or machine.
and that surface is uniform in textura. Tool joints and edges as shown on the approved construction drawings.
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Surfaces subjected to moderate or high velocities cr water shall be screed
' 11.4 to correct shape required by approved construction drawings, then ficated 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, 1
suniform surface free from trowel marks.
11.5 All concrete shall be protected against damage untti final acceptance by
'the Engineer.
1i.'6 Use speelal care in the finishing of floor areas of offices, shops, assemb' R-I rooms and other areas where appearance is important.
Special floor finish.
shall be in accordance with Referenedt 4.1.
I 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 subje'ct to the Engineer's review.
Form oils shall. be approved by, the Engineer and applied per Reference 4.1.
12.2 12.3 Chamfers and fillets shall be Installed per the approved construction drawing s-d Reference 4.1.
12.4 Fe-s shall remain in p, tace for time specified in Reference 4.1.
l i30 ADVERSE WEATHER CONDITIONS l
All concrete placed in hot or cold adverse weather conditions shall be placed ir accordance witn Parsgraph 8 of Reference 4.1.
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n J. A. JONES CONSTRUCTIQU COMPAM PAGE 8 or 8 0
PROCEOU.'4 :,0.
CONSTRUCTION.t.*0PX PR0023URE V-wp-7 F2V. NO ;,
II!LE:
E 4/30/76 CONCRETE PLACING, CURING, FlMISHING AND REPAIRS
?ROJECT TITLE:
'lATERFC30 SES UN!T NO. 3 COMTRACT NO. V3-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 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. Tha J. A.' Jones " Concrete Pre-Placement Checklist Record", Appendix A, shall be completed for each pour. The J. A. Jones " Concrete Pre-Placement Check}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 the date, time and drawing including the revision the work was perforr ed 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 s.!gn 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
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has bee'n completed, the Area Superintendent and the Area Qual'Ity Verificatic 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" snall 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 8, in contractor colum.9 Indicating J. A. Jones is ready to place concrete.
14.4 Afterallredairedsignatureshavebeensecuredandthepourisanoroved for concrete placement, J. A. Jcnes shall be provided a copy of t'e Eb:tt; "Cen:ree Pre-Plece-emt Chacklist Record" and it shall become a part of the final document record package which will be turned over to tne Engineer after the placement.
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WATCRFORD SES - U:'IT 3 4
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- CONCRETE PRE-PL\\CE
- E::T CllECl*'.!ST RECCnD
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Location:
i Elevation:
to Pour No.
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Detailed
Description:
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l ITD1 CONTBACTCR INSPECTOR l
DATE Sandblast /Greenqut/ Foundation Treataand nae. '
i Forms (L'ne and Grade) i
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Blockouts, Keys, Waterstop, etc.
Rainforcing Steel Anchor Bolts, "Ictbedded Steel i
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i Electrical l
Hechanical i
Final Clean-up
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i special Instructions:
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i Approved for Placine Time Date 1
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J. A. JONES CONS"UCTION C..#ANy APPEN0ix C i
hiATERFORO UNIT 3 CONCRETE rudR PLAN Lesetion Elev.
To Peur No.
Pour Date Est. Cubic Yeres A
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Stand 6y '
Rappers. Trentes l
i Isreeds. Screed Reds i
.mFinishing Tools. Bullfleets, Trowel Mech. etc.
. Coring Eeufpment. Send. Heses. Sprinklers l
tempower
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