ML20127B777
| ML20127B777 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 05/12/1976 |
| From: | J.A. JONES CONSTRUCTION CO. |
| To: | |
| Shared Package | |
| ML17198A241 | List:
|
| References | |
| FOIA-84-455 W-SP-7, NUDOCS 8506220055 | |
| Download: ML20127B777 (11) | |
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-, . . . 1 J. A. JONES CONSTRUCTION COMPANY .
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'. SPECIAL PROGESS PROCEDURE .
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REPAIR AND CURING OF CONCkETE FOR
- . REPAIR'FOR PLACEMENT 499502-108 .
J .
WATERFORD SES UNIT N0.3
.. . CONTRA.CT NO. W3-NY-4 .
ENGINEERING QUALITY ASSURANCE CONSTRUCTION REV. DATE APPROVED BY DATE APPROVED BY DATE APPROVED BY DATE o da Hi, af$% .rhant, o s P '/l
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FREEDOW OF INFORMAT,10N ACI REQUESI *
' 0506220055 050222 .
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J. ... J0NES CONSTRUCTION CCHPANY 7 PAGE j OF6 SPECIAL PROCESS PROCEDURE PROCEDURE NO.
W-SP-7 TITLE. REPAlR AND C'JRING OF CONCRETE REPAIR FOR PLACEMENT -
REV NO. 0 699502-108 c DATE 5/12/76 PROJECT TITLE: WATERFORD SES UNIT NO. CONTRACT N0. W3-NY-4
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l' . 0 PURPOSE -
To outline methods used by J. A. Jones Construction Company and Subcontractors for repair and curing of concrete repair for Placement 499502-108.* *
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2.0 SCOPE This procedure includes the requirements to be used by J. A. Jone s Construction Company and their Subcontractors In the concrete repair of Placement 499502-10B.
30 REPAIR SEQUENCE .
3.1 The sequence of repair work shall be as follows: .
3.1.1 Pressure gro4 ting of holes in 'ar.ea of cracks.
3.1.2 Repair of top surface. *
'. ~ 3.1 3.. Waterst'op embedmont. ~
Filling o' holes not in ciack ah.
3.1 '.4 ,
3.1.5 Pressure gr uting ..volds and horizontal cored holes in West face.-
4.0 REFERENCES
4.1 Ebasco services, incorporated Specification LOU-1564.472, Section 11,
, latest revision, " Concrete Placement., Curing and Finishing".
4.2 ACI-503, Guide for use of epoxy compounds with concrete.
4.3 Sika Chemical Company brochure for "Sikadur Epoxy Adhesives". -
i 4.4 J. A. Jones Construction Compr.ny Work Procedure, $-WP-5, " Concrete Placing,
' Curing, Finishing and Repair.",
5.0 RESPONSI8illTIES .
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. 5.1 Ebasco services, incorporated is responsible for supplying all materials.
recolving Inspection, testing and documentation of such tests as required
- by Reference 4.1 to support J. A. Jones Construction Company and their Subcontractors In por. forming their work.
5.2 J. A. Jones Construction Company and their subcontractors are responsible
! for forming, placing aggregato, grouting and curing of cement pressure grouted area, the epoxy pressuring grouting for soallnq cracks and the surfaco preparation and topping and finishing of top surface as rcquired by this proceduro. .
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J. A. JONES CONSTRUCTION COMPANY 7 PAGE 2 0F6 t
SPECIAL PROCESS PROCEDURE NO.
W-SP-7 TITLE: REPAIR AND CURING OF CONCRETE REPAIR FOR PLACEMENT 499502-10B REV. No. O
- 8. DATE 5/12/76 PROJECT TITLE: WATERFORD SES UNIT NO. 8 CONTRACT NO. W3-NY-4
,, . TOP SURFACE PREPARATION 6.0 PROCEDURE .
6.1 J. A. Jones Construction Company Engineering shall map the surface of th,e entire pour delineating the areas that can be made to meet the required elevation and finish by grinding and the areas that must be chlpped out and topped.
- 6.2 The ' areas requiring chipping and topping shall be chipped down to a minimum of one and one-half Inch - (lid) belciw recuired elevation.
' 6.3 After chipping and prior to any topping or grinding of other area, J. A.
Jones Construction Company Engineering shall notify *Ebasco's Engineering
- that the area is reddy for testing by th,e " Windsor Probe" method. Any area containing unsound concrete as determined by this method, shall be chipped out per Paragraph 6.2 above,. .-
6.4 Areas requiring, grinding only to produce en acceptable surface shall be gro.unli with suitable grinding machines until acceptable.
6.5 The surface of the chipped out area shall be cleaned, then coated with a neat coat of Sikadu'rHI-Mod epoxy mixed and applied per manufacturer s 8 r, equi raments. '
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J. A. Jones' quality Verification to verify and document the acceptance .
of epoxy material as to shelf II.fe, mixing and application.
6.6 After neat coat of spoxy. place 4000' PSI Class AA concrete to reciuired elovation and finish as required by approved construction drawings. ,
6.7 After the required finish has.been obtained, cure per requirements of Reference 4.1 and 4.4 '.*
WATERSTOP EMBE0HENT ' '
7.0 Proct 0URE ,
, ,7. I Preparat lon. .
7.1.1 p termine area to be ' repaired. A es shall be determined by estimating workable area that can be worked, based on " pot life"
' and required tooling time if repair requires more than one Inch (l")
thickness, Reference 7 3.2. ,
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J. A. JONES CONSTRUCTION COMPANY PAGE 3 0F 6 OCEDURE NO.
SPECIAL PROCESS PROCEDURE .
W-SP-7 REPAIR AND CURING OF CONCRETE REPAlR FOR PLACEMENT REV. NO.
E'
- 1699502-108 & DATE -
PROJECT TITLE: WATERFORDSESUNITN0]3 CONTRACT NO. W3-NY-4 1 . .
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- .7 1.2 Clean area to be worked as, follows: .
s 7 1.2.1 Chip to sound concrete'.- ,
7 1.2.2 Surface must be dry. ,r /
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7.1.2.3 Reove all ' dust, taitance, grease and other foreign particle 6.
Straighten and support waterstop as required.
7 1.3 7.2 Mixing. .
7.2.1 Mix Sikadur-Hi-Mod Gel two (2) parts epoxy per manufacturer's recomnendat l,ons. Amount to be determined b'y area to be worked. -
7 2.2 Measure Colma Quartzite Aggregate and mix one (1) part Sikadur-HI-Mod Ge epoxy to one (1) part Quartzite Aggregate. Add aggregate slowly to binder while mixing.
- 7.2.3
Do not attempt to use after " pot life" has expired. By adding
, aggregate, it will add approxima'tely five (S) minutes to " pot life".
. 7.3 Applicati,on. .
7.3.1 Apply prepared epoxy mortar to embed waterstop as required per
, attached sketch, Appendix A'.' .-
7 3.2 Apply mortar not to exceed one Inch (l") thickness. If required mortar thickness exceeds one Inch (l"), allow proceeding layer to cool before applying second layer. . Coolness can be determined when the mortar becornes hard. It should be cool, approximately
. one (1) hour after mixing. -
.'7.3.3 -
When more than one (1) layer is required..'a neat coat of Sikadur-
. HI-Mod epoxy to proceeding layer before applying additional layers of mortar is not required.
7.4 curing. * * - '
7.4.1 None required. '
NOTE -
00 NOT l'XCEED OhlE INCH (l") LAYER AS NOTED IN 7.3.2 A80"E._
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t J. A. J0NES CONSTRUCTION COMPANY 7 PAGE 4 0F 6 CCE E NO.
SPECIAL PROCESS PROCEDURE w_ p REPAlR AND CURING OF CONCRETE REPAIR FOR PLACEMENT REV. NO. 0
.I'IT LE *.
600502-100 & DATE 5/12/76 PROJECT TITLE: WATERFORDSESUNIT$h.3 CONTRACT NO. W3-NY-4 T .
. REPAIR OF VERTICAL CORED HOLES WITHOUT CRACKS 8.0 ,
PROCEDURE .
8.1 Thoroughly clean holes nuinber 1, 2. 3,..*, 5. 6, 8, 9', , 11, 12. 13, 16,
- 17;.20, , as located on a.ttached sketch, Appendix B.
8.2 Coat inside surface of hole and surface of area chipped out to expose reinforcing steel with Sikadur-HI-Mod epoxy. The epoxy to be mlxed and applied per manufacturer's reconinendations. J. A. Jones' quality Verification personnel is to verify and document epoxy acceptance as pertains to shelf life, mixing and application.
8.3 in accordance with Reference 4.1 and 4.4, fill holes' with 4000 PSI Class AA cement and' vibrate as required .to consolidate and finish to
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match required surface texture. .
- 8.4 Cure as required per Reference 4.1 and 4.4 PRESSURE GROUTING V0105 AND HORIZONTAL CORED H0LES No. 25 IN WEST FACE .
9.0 PROCEDURE * . ,
9.1 J. A. Jones to Inspect and document both North and'$outh large vold '
has been chipped to sound concrete'.'
9.2 Fprm both North and South void per attached sketch, Appendix C, and Paragraph 9 3 below. ., , ,
9.3 Construct forms. In strips to allow packing of aggregate as form progresses over the vold. The section of the form which will cover the deepest section of the vold shall have a " slip plpe" Installed long enough to reach the extreme back of the vold. Install the section of form over the deepest section of the vold and extend "silp pipe" to reac'h the extreme back of .
- the vold. Pack the vold around the " slip pipe" with washed aggregate until the angle of repose causes the aggregate to fall out front of vold. Install the bottom section of form with grout nozzle located. at extreme bottom of vold. Complete packing vold with aggregate and installind sections of form until entire vold is packed. Top section of form must provide vent
.. at top of vold. Apply grout through " slip pipe"'until grout is forced out through bottom grout nozzio and top vent. When grout is observed entering hole drilled,down from top surface, fill hole with aggregate.
,, When grout is forced out all vent, slowly remove " slip pipe" whilo under pressyre. When " slip pipe" is removed, apply grout through bottom grout
. nozzle until grout la forced through all vents.
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J. A. J0NES CONSTRUCTION COMPANY 7 PAGE 5 0F6 s
PROCE]URE NO.
SPECIAL PROCESS PROCEDURE y, g p,/,
REPAIR AND CURING OF CONCRETE REPAIR FOR PLACEMENT REV. NO. O TITLE
- 499502-108 & DATE 5/12/76 PROJECT TITLE: WATERFORD SES UNIT NO 3 CONTRACT NO. W3-Ny-4
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9.4 Cure by leaving forms in place to keep in moist condition, as required .
per Refe'ence r 4.1 and 4.4 '
9.5 Form opening of horizontal cored hole " as required and pack with aggregate and pressure grout per Paragraph 9,3 above.
9.6 After curl'ng has been completed on North add South <vold, remove forms and apply waterproeifing.over area per J. A. Jones' Work Procedure, W-WP-il,
" Waterproofing" except that two (2) layers of waterproofing membrane shall be installed pround sl1,5dges. .
E_P0XY PRESSURE Gil00TINd CORI0 N0LES FOR R(PAIR Oc Pl.ACEMENT 4ts9502-10B 10.0 PROCEDURE- ,
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~ ' 10.1 All'ekulpment required for this prt>cedure shall be collected and checked out. Asdry run shal b be performed using water for the grout, pumping ,
against ( closed valve, to assure the equipment is in good working order.
Special r4its shall be inade of the pressure gauge and relief valve to assure correct operability. , , .
s 10.2 'The Siked NLo-Mod, LV. sph/ snit bagged pea giavel shall be ordered, received and appr6ved for use. '
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10,3 ' Cored holes number L 14,~15, 18. 19, 21, 22,' 23 and h d located on
' Appendix "B" shall be cleaned of all foreign material and fece of all standing water, before any other grouting opera 3 Ion is started.- .
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10._4 An expanding piig as dea lled.on attached.sketcN Arp pen d l.i'.80d , shall b'e'
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- fabricafed for each hole to Le,preceure grouted, end coat ed with wax to prevent adherence of the. epoxy. Each .pluy i shal13roviiJe a fi11 port and a vent.\ Ths fill port shall Le' pr6vidad Ni sh alpick coupling and the ,
]* vent with a cap arf valve for 'ventinji %e supp[y . line Letween the ' pressure pot and'e,UlcE coupling shall4ti provided with a sighc glass for observing flow ofra #xy. ,
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% 10.5 Th6 grot ting operation shall begin with hole numoer 24. Assure that all J holes are clean and dry' ttien pack hola number 24 with paa graven from one
- pf the sealed baQs. 'When the hole- has been packsd nith the pea gravel, i
InstJll the, >plug, as provided in IC',4 abcnfe.
- 10.ti Mix the Sikadur-Lo-Mcd LV epoW per tunufse'turer's recommendatio'ns. Mix L only the" amount that can be u.a.ed,ii) appray.imately l$ minutes.or as directed he,the Sika representative. Plhc.e the antainer of epoxy into one of the v d paint pressure pots which has beco connected to the quidk cciopling in the
%~- ' p l ug ln sc.l e 21. Apply air pressore as directed by Sika "cepresentative
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,' J. A. .NES CONSTRUCTION COMPANY PAGE 6 OF 6
. PRocEcuns tio.
CONSTRUCTION UORK PROCEDUKE W-SP-7 REV. NO o RTLE REPAIR AND CURING OF CONCRETE REPAIR FOR PLACEMENT 499502-108 & DATE: 5/12/76 PROJECT TITLE: .
. WATERFORD SES UNIT NO. 3 CONTRACT NO. W1-NY h 10.6 (continued) to pressure pot and observe flow of epoxy in sight glass. When the epoxy runs out, switch grout supply line to other pressure pot and continue grouting
. operat ion. Clean first pressure pot grout supply line with Sika Equipment l Cleaner 650 while additional epoxy is being mixed. Continue this switching and mixing operation until epoxy is ob' served passing into one of the adjacent cored holes, then stop the grouting operation in hole number 24 Plug the
- fill port and close the vent.
10.7 Fill'the hole in which the epoxy was observed flowing into with pea gravel, install the plug and start the grouting operation as described in Paragraph 10.6.
Observe the cther holes and when epoxy is observed flowing into one of them, stop the grouting operation in the present hole and move to the hole where epoxy was observed. Contictue this observation, filling with pea gravel, and
' grouting operation until all connecting holes have been grouted, assuring that all air has been removed and epoxy is forced out the vent opening. .
- - 10.8 Holes without connecting cracks shall be grouted by cleaning and filling with
- pea gravel and groutin'g as outlined in Paragraph 10.6 above.
10.9 Hole number 22 shall be grouted, as above, except when grout is observed passing through the connecting crack into the South void on the West side. The pressure shall be relieved and the opening of the crack plugged with Sika Set Plug then
- the pressure resumed and grouting continued unti.1 all air -is removed and grout is forced out the vent.
'10.10 Remove all plugs a.nd clean plugs and equipment with Sika Equipment' Cleaner 650.
10.11 After epoxy has set and at time of filling of holes which did n'ot contain cracks, fill the remainder of the holes using the, procedure for filling. cored holes without cracks, Paragraph 8.0 above. , .
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.. APPENDIX A
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. . CORE LOCATION
, POUR NO. 499-10B H4213 50 N4213.50
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N4145.00 CONCRETE PLACCl1ENT For POUR 100
' PLACEMENT DATE FEDRUARY 5,1976
, W-SP-7 APPENDIX B
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