ML19210B638
| ML19210B638 | |
| Person / Time | |
|---|---|
| Site: | Three Mile Island  |
| Issue date: | 11/07/1968 |
| From: | GILBERT/COMMONWEALTH, INC. (FORMERLY GILBERT ASSOCIAT |
| To: | |
| Shared Package | |
| ML19210B631 | List: |
| References | |
| SP-5406, NUDOCS 7911110110 | |
| Download: ML19210B638 (21) | |
Text
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.f Tr,4 c Wmw r A/o. 3 UNITED ENGINEERS & CONSTRUCTORS INC.
GENERAL CONSTRUCTION AND QUALITY CONTROL FROCEDURES FOR STRUCTURAL CONCRETE QUALITY CONTROL PROCEDURE NO. 1 Construction Specification Gilbert Associates, Inc. SP 5406 2 Nomvat*%/94f Revision /: AufA-t 30, 1% 0-I. GENERAL A. Responsibility - The prime responsibility for the Quality Control Program and development and implementation of Quality Control Procedures for the Three Mile Island Nuclear Station - Unit No. 1 rests with the Construction Manager,. United Engineers & Construc-tors Inc. (UE&C). B. Independent Testing Agency - United Engineers & Constructors will retain the services of an independent testing agency (T.L.) to . perform the necessary inspections and tests required within the ' scope of these procedures. The activities of the T.L. will be under the direction of the UE&C Field Supervisor - Quality Control in matters relating to scope of duties and project policies. The T.L. sh'all act within themselves in matters relating to daily pro-cedural activities. The T.L. shall have sufficient personnel and equipment available at the project site in order to effectively, promptly, and accurate-ly carry out the rout.ine duties prescribed within these procedures. (NOTE: Any work performed by the T.L. off site will be only as authorized by the Field Supervisor - Quality Control.) i
'Cs Reports and Records - Reports generated by the T.L. will be as required within the following specific procedures. These reports will be submitted to the Field Supervisor - Quality Control and will become a part of the permanent Quality Control file. Copies of the reports will be distributed to the Engineer and the Owner as required. 1538 08i
# 911110 //O
i 1 I I I. GENERAL (Continued) D. Scope - For purposes of licensability these procedures will apply to the concrete, concrete operations, reinforcing steel, and struc-tural fill work within the Class I areas (those areas which have a first order effect on nuclear safety). II. PROCEDURES A. Preliminary Tests
- 1. Concrete Aggregates - The T.L. shall visit suggested sources for fine and coarse aggregates and obtain samples of each proposed aggregate size for preliminary testing and approval.
Testing methods and acceptance standards shall be as follows: Acceptance Test Method Standard Sampling ASTM D75-59 - Gradation - Sand ASTM C136-63 PDH, Form 408 Gradation - Stone ASTM C136-63 PDH, Form 408 Mortar Strength - Sand ASTM C87-63T PDH, Form 408 Sodium Sulfate Soundness ASTM C88-63 PDH, Form 408 Los Angeles Abrasion - Stone ASTM C131-66 PDH, Form 408 Material Finer than No. 200 Sieve ASTM C117-66 PDH, Form 408 Organic Impurities - Sand ASTM C40-66 PDH, Form 408 In addition, the following tests may also be performed to give ' necessary information concerning the proposed aggregate, how-ever, the basis for selecting aggregate shall not be limited to the results of these t.sts. Test Method Petrographic Examinatica ASTM C295-65 Fineness Modulus ASTM C125-66 Unic Weight ASTM C29-60 Specific Gravity and Absorption ASTM C127-59 and C128-59
- 2. Cement - The T.L. shall obtain samples of the cement proposed for use in the project. Chemical and physical analyses of the samples shall be performed to determine compliance with the following test methods specified in ASTM C150-66 for Type II c uents:
1553 082
I
I. PROCEDURE
S (Continued) A. Preliminary Tests (Contir.ued) ,
- 2. Cement (Continued)
Test ASTM ?bthcd Sampling . C183 Chemical Analysis C114 Fineness by Air Permeability C204 Autoclave Expansion C151 Time of Setting C266 Air Content of Mortar C185 s Compressive Strength C109 Tensile Strength C190
- 3. Mix Designs - All materials used shall be tested as specifi'ed above and shall meet the specification requirements and be approved in writing by the Engineer. Proportions for the con-crete mixes shall be determined by Method 2 of Section 308 of ACI 301-66 to comply with the project design strengths speci-
. fied in SP 5406.
- a. In. addition to the above requirements, the maximum water-cement ratio and maximum total water content of any mix shall be as shown on the approved design mix. 2.
- b. Slump for structural concrete shall not excee'd four inches
.or be less than one inch. Structural concrete with slump not within these limits shall be rejected.
- c. Structural concrete shall be air-entrained with chemical -
admix conforming to ASTM C260-66T. Entrained air content shall be limited per aggregate sizes as follows: Nom. . Max. Size Air Content Coarse Aggregate % by Volume 1/2" 5-9 3/4" 4-3 1-1/2" 3-6
- d. A retarding, water reducing densifier conforming to ASTM C494-65'T, Type D and containing no calcium chloride shall be used with all 3000 psi and 5000 psi structural concrete.
1508 053
t ' II. _ PROCEDURES (Continued) A. Preliminary Tests (Continued)
- 3. Mix Designs (Continued)
- e. Rasults of the design mixes with recocmended final mix proportions shall be presented to the Engineer for approval.
- 4. Rei.nforcing Steel - Mill test reports of chemical and physical analyses shall be furnished for all reinforcing steel' received on the site.
Mill test raports shall be reviewed for conformance to the
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a. following specification requirements: Up to size #11 b'ars - ASTM A19 - Size 14S and 18S bars - ASTM A408 -
- b. UE&C Quality Control personnel shall select from each heat l1.
and size of rebar received at the site, two specimens per
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sample lot for testing to determine the yield point, ulti-mate strength and percent elongation. These rebar tests will be termed " User Tests" and calculations shall employ the actual measured cross sectional area of the specimen and not the nominal area. A sample lot is defined as material of one heat weighing 25 tons or less.
- c. When a failure is noted in the User Tests, resampling will be conducted on twice the number of samples as originally selected and tested. When all of the resamples pass, the ,
lot represented by the-sample shall be~ considered. accept-able. Only two resamplings of a lot will be permitted. Failure of the second resamples shall be cause for rejec-tion of the represented lot..
- d. Reinforcing steel, when received, is bundled and metal-tagged by heat and size. Bars remain so bundled and tagged until User Tests are complete and results found acceptable.
Then, and only then, are the tags and straps removed and the material released for construction. No tagged steel (indicative of " tests still unresolved") will be released for construction. Any steel which does not pass inspection or test requirements will be immediately removed from the site. A storage yard log is maintained showing material received, sampled, tested, and accepted for use. The log
.ris kept up to date by information supplied by the Field Supervisor - Quality Control and is audited by the Quality Control group. ,
II. PROCEDURES (Continued) A. Preliminary Tests (Continued)
- 5. Welded Wire Fabric
- a. Mill test reports will be required on welded wire f abric which shall conform to ASTM A185-64.
- b. Tensile and bending properties shall conform to ASTM A82.
- 6. Cadweld Splices
- a. Reinforcing steel bars l'arger than #11 shall be spliced with the "Cadweld" process.
- b. Mill test reports for spiicing sleeves and powder will be required and reviewed for compliance with Specification requirements. Rejected material will be ceturned to the Vendor or otherwise removed from the site.
. c. Prior to production work, the operator designated to per-form "Cadweld" splicing will be qualified by preparing a test joint for each bar size and position he will be re-quired to splice. These test joints will be tested in tension after visual examination. If the test splice develops at least the minimum specified ultimate strength of the bar ( A408 bars - 70 ksi) the operator shall be con-sidered qualified to produce that size and position of splice.
- d. Using previously qualified operators, approximately fifty -
splices will be prepared under production conditions. From these splices, at least sixteen will be randomly selected and tested to destruction. Results of these tests will be turned over to the Engineer for evaluation and determination of the initial sampling rate for production splices,
- e. In qualification of both pre-production and production splices, each completed splice shall meet the following acceptance standards:
(1) Sound, non-porous filler metal shall be visible at both ends of the splice sleeve and at the top hole in the center of the sleeve. (A single shrinkage bubble present below the riser is not detrimental and should be distinguished from general porosity.).
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I. PROCEDURE
i (Continued) A. Preliminary Tests (Continued)
- 6. Cadweld Splices (continued)
- e. (Continued)
(2) There shall be evidence of filler0metal between the
- sleeve and bar for the full 360 , however, splice sleeves which are not exactly concentric or axially aligned with the bars are. acceptable.
(3) The bar ends shall be clean and free from rust, mill scale,. slag, grease, paint, moisture, etc. (4) Bars shall be longitudinally centered in the sleeves as shown by previously affixed center-punch marks or similar identifiable location marks on the bar. (5) Bars shall not be scarfed and the portion of the bar in the sleeve shall have uniform deformations along its length consistent with the rolled mill pattern.
- 7. Structural Fill - Fill material from borrow areas previously selected by the sngineers shall be sampled by the T.L. for ,
determination of moisture-density relationships.
- a. Selected non-plastic fill material shall conform to com-paction standard ASTM D2049 and. acceptance standard shall be 707. minimum relative density. .
- b. Selected plastic fill shall comply with compaction standard AASHO modified method and acceptance standard shall be 957.
of maximum density, minimum and i 27. of optimum moisture at time of compaction.
- c. Prior to beginning placing fill on any day, the surface of the existing material vill be scarified to a depth of at
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least 6 inches and moisture conditioned to within 27. of
. optimum moisture.
8.' Concrete Batch Planc - The concrete batch plant, which includes the aggregate storage areas, weighing and measuring systems, and transit mixer trucks shall be inspected to conform with ASTM C94-65.
- a. The scales shall be calibrated prior to original use.
Standard weights will be available for periodic checking , of scale calibration (anticipated monthly). 1583 086
I
I. PROCEDURE
S (Continued) A. Preliminary Tests (Continued)
- 8. Concrete Batch Plant (Continued)
- b. Water measurement and admix dispensing will be checked by measuring the amount of liquid delivered from a dial set-ting. Water measurement will be checked weekly and admix dispensing will be checked continuously by the use of site gauges (or clear containers) through which the liquids flow.
- c. The automatic moisture compensating probe will be checked prior to daily operation of the plant against known sand moisture content.
B. Fi' eld Tests
- 1. Structural Fill - Prior to placing structural concrete on compacted fill, the fill will have been checked by the T.L.
to determine that percentage compaction or relative density has been achieved. Field density may be determined by the sand cone or the balloon method. Subgrade will be free from debris and organic material and shall be thoroughly wetted. ,
- 2. Foundation - Vapor barriers shall be used under slabs poured on earth subgrade. No concrete may be placed on frozen sub-grade material. Concrete seal mat (3" minimum) placed below bottom of structural concrete elevation shall be mapped and/or approved by Engineer and inspected by Quality Control. Rock -
subgrade shall be cleaned, washed, and air-blown prior to placing structural concrete. Old concrete surfaces shall be cleaned by water jet, brushing or air-blowing prior to place-ment of a new pour. It shall be the general foreman's respon-sibility to assure that these provisions are followed. Horizcntal joints in the Containment Building, shell wall and dome will be prepared by water jet or wire brushing. A care-fully laid coat of cement and water grout will be placed on joint surface immediately prior to start of concrete placement.
- 3. Forms and Reinforcing Steel - Prior to a pour, the T.L. will check that forms are clean, oiled, tight and secure with em-bedments located per drawing. Size, placement, and splicing of reinforcing steel will be checked as required by the speci-fications and applicable drawings. It shall be the responsi-
.bility of the general foreman to assure that only approved reinforcing steel (subject to audit by the Quality Control group per paragraph II. A.4.d.) is used and that Cadweld splices comply with paragraph II.B.6.f. Cadweld splices are subject to inspection by the T.L. per paragraph II.B.6.
1 Eno 037
I
I. PROCEDURE
S (Continued) B. Field Tests (Continued)
- 4. Batch Plant Inspection - The T.L. shall have an inspector at the batch' plant whose duties in connection with each pour shall be .
- a. Check aggregate storage and cement to assure that suffi-cient materials are.available to complete the scheduled pour.
- b. Prior to the first batch, sample and test the fine and coarse aggregate for gradation and surface moisture. Fine aggregate will be checked for moisture content at least every two hours during production. It is recommended that the batch plant inspector check each load of sand conveyed to a mixer cruck for moisture using a hand probe, " Speedy Moisture Tester," or similar device. It is felt that more precise water and slump control can be gained in this man-ner. During periods of frequent concrete bacching, this should be done as often as practical without sacrificing cime from normal duties.
The coarse aggregate will be checked at least every two hours for moisture content and corresponding added water adjustments'made manually. 1.
- c. Adjust the automatic moisture compensating setting to account for surface moisture of fine aggregate to assure the correct addition of water as called for in the mix design. The "over-under" moisture gauge will be monitored -
and if the indications are that the fine aggregate is run-ning wetter or drier than the determined setting, the sur-face moisture will be rechecked and the compensator adjusted accordingly,
- d. Enough water will be added at the project batch plant to l2.
produce an estimated 3" slump. In addition, each truck may carry an extra 2 gallons of water per cubic yard which may be added, if necessary, at the pour site under the direction of the T.L. inspector, and in.accordance with the provisions of these procedures and those of SP 5406.
, Prior to any addition of water at the pour site, the T.L.
inspector shall check the batch ticket to determine how much water may be added without exceeding the total water require-ment. (Bacch plant inspector shall show on the batch ticket how much water can be added to the load without exceeding the allowable maximum water-cement ratio.) No more than this amount may be added at the pour site. 1. Io suo OS3 s
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I. PROCEDURE
S (Continued) B. Field Tests '(Continued) a
- 4. Batch Plant Inspection (Continued) *
- d. (Concinued)
No water shall be added at the pour site if the following mixing pimes have already been exceeded:
\
. Max. Elapsed Time Prior to Addition of Water at Pour Ambient Temperature Site -
+900F 30 Minutes 75 - 900F 45 Minutes !
'-75 F 0
1 Hour l In no case'shall more chan 757. of the maximum revolutions i or.more than 60 revolutions at mixing speed have been i exceeded prior to the addition of water at the pour site. j i After any addition of water at the pour site the load will be mixed at least an additional 25 revolutions at mixing s speed, but, in no case, shall the maximum of 100 revolutions at mixing ' speed or 300-revolutions total be exceeded. Only 1 addition of water at the pour site shall be permitted. Temperature of concrete will be checked after addition of water.at the pour site. Limits as shown in the approved design mix regarding maxi-mum slump, water, and water-cement ratio shall not ' ex-ceeded. Mixing time, mixing revolutions or temperature shall not be violated due to pour site addition of water. Such violations remain cause for rejection. 1. 2.
- e. Check batch card to see chat proper mix is being bacched and that card is punched correctly,
- f. Prepare batch tickets that will show: date, time loaded, cruck number. load number initial number of revolucions on counter.
concrece design strength, amount of concrece loaded, amount of each ingredient, including ice added, percent surface moisture of fine aggregate and coarse aggregate, total water content per yard (including surface moisture of aggregates), amount of water allowable to be added at the pour site portion of the structure where used, and signature of the bacch plant inspec-tor. At the site of the pour, the field inspector will add to I the batch ticket: ambient temperature, concrete temperature at time of placer.ent, slump, amount of water added at pour site. f' total number of revolutions at mixing speed prior to addition of { water at pour site, :ocal number of revolutions at mixing speed, ! number of total revolutions, time of placement,'and his signature. l1. 1588 089
10
I. PROCEDURE
S (Continued)
- 3. Field Tests (Concinued) t
- 4. Batch Planc Inspeccion '(Concinued)
- g. Check recording tapes for confirmation of actual batch weighjsandaccachcopytochebacchticket.
- h. Make periodic checks of batch plant conveyors to assure that mix ingredients are introduced into the transit mixer simultaneously.
- i. Check th2c each transit mixer drum is free of excess water before mix ingredienes are introduced into it. This shall be che responsibility of the bacch planc supervisor and subject to audic by the batch plant inspector.
The T.L. batch plant inspector shall be solely responsible for adjustments in water content of the mix. Recommendations for adjustment of water conconc may be made by the T.L. field inspector (s), UE&C ' Quality Control personnel, or UE&C Construc-tion Supervision. However, the T.L. batch planc ~ inspector shall be the only one allowed to adjust water content. In no case shall this adjustment increase the water concent to a point where the water-cement ratio, as shown on the approved design mix, is exceeded. 2. A daily summary report of batch planc activicies will be com-pieced by the T.L. batch plant inspector. This report will include but not'necessarily be limited to:
- a. Dace
- b. Total yardage batched by class of_concrece Location of each pour (specific porcion of the structure) c.
- d. Brand of cement used
- e. Moisture content of sand at cimes checked
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- f. List of water adjustments and reasons for them
- g. Ceneral remarks on plant operation -
- h. Signature of bacch planc inspector
- 5. Field Inspeccion of Concrece Structural fill, concrece forms and rebar shall be checked prior to each pour as noced above. No concrece pour will be made with-out release by the various craf t supervisors' signatures on the Concrete Placement Checkout Sheet and final approval by the Job Engineer. The T.L. shall assigt. inspectors ac th location of each pour who will assure that the free fall is a ""#" -of three (3) feet, and the concrece is properly vibraced. The T.L.
Field Inspector shall have che authority to reject truck loads of concrece. The basis for his rejtetion of concrece shall be its failure to comply with the proceture for Structural Concrete as defined in parts A chrough C of : Sis seccion. The UE&C Concrece I Superintendenc, and the UE&C Quasity Control personnel, shall al - l1. so have che authority co reject : ruck loads of concrece. Reports of rejection shall be made direc dy to che UE&C Field Construc-efon suoervisor. qp9 )00
e t . PROCEDURES (Continued) ch cg II. {6363 B. Field Tests (Continued) I <> e9 eu J. as
- 5. Field Inspection of Concrete (Continued)
No rejected concrete shall be returned to the batch plant l1. for additi~n o of water. The Concrete Superintendent shall direct rejected loads of concrete to predetermined locations that have been selected prior to daily concrete operations and shall record the concrete's disposition. The Concrete Superintendent shall also inform the Batch Plant Supervisor and Batch Plant Inspector of the slumpe of rejected loads of concrete or other cause for rejection. The T.L. Field Inspector shall also make the following checks:
- a. The T.L. Field Inspector shall check each truck revolu-tion counter and record the number of revolutions at mixing speed and the final revolution count prior to pour on the batch ticket. Loads that have had more than 100 revolutions at mixing speed, or that have had more than 300 total revolutions, or that have not been poured
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I hours after mixing shall be rejected. If it is necessary to add water for workability to the concrete, the T.L. inspector shall check the batch ticket to see how much water may be added at the pour site. This water shall be added as outlined in II.B.4.d. above. 1.
- b. Check the concrete in each truck for slump following the procedure of ASTM C43-66 and record the results on the batch ticket. Loads with less than 1" slump or more than 4" slump shall be rejected.
The slump test will be taken from concrete sampled from the middle 80% of the load. If visual examination by the T.L. inspector of concrete being discharged from the truck indicates slump obviously below the 4" maximum, the truck shall be allowed to discharge completely while the test is being made for the record. Otherwise cruck discharge shall be delayed until the slump test can b made. If the slump is 'found to exceed 4", t ra truck may be allowed to move aside aid turn at agitating s seed for no more than 15 minutes provLding time and total rivolution limits are not exceeded. At the end of this timo, the slump will be rechecked and if it is 4" or less the ase of the concrete will be allove!. 1. 1 E^Q
. Isov 0O1i
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II. PROCEDURES (Continued) B. - Field Tests (Continued)
- 5. Field Inspection of Concrete (Continued)
- c. Determine the temperature of the concrete in each truck before it is poure'dWrecord the results on the batch ticket. Loads that are designated for mass concrete pours shall be rejected if their temperature exceeds 70 F, and loads. designated for other pours shall be re-jected if their temperature exceeds 90 F. Loads whose temperatures are lower than 500F when the mean daily temperature falls below 40 F shall be rejected.
- d. Make and cure one set of concrete test cylinders (6" x 12") per ASTM C31-66 daily for each 50 c6bic yards of concrete or portion thereof placed per class. A set of cylinders shall consist of 6 cylinders for 3000 psi con-crete and 8 cylinders for 5000 psi concrete, taken from
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the middle
- 80% of one truck load of concrete. Concrete cylinders shall be cured initially in accordance with Section 9(a) of ASTM C31-66. Concrete cylinder molds C shall conform to the requirements of ASTM C470-65T and certificates of compliance to this specification will be available and part of the permanent Qualicy Control file. ,
- e. From each load of concrete sampled 'for the make-up of concrete cylinders record.results of a slump test, temper-ature check and an air cont'ent test per ASTM C231-62. ' ,
- f. Survey concrete placing operations for homogeneity of mass, proper vibration (consolidation) and for conformance to specification requirements unique to the pour; such as, preparation of subgrade, placement of vapor barrier, con-dicion of adjacent concrete surfaces, finish as specified on drawings using appropriate equipment, etc.
- g. Return field-cured test cylinders from previous pour to l1.
field _ laboratory for standard laboratory cure.
- h. Prepare a report of daily field concrete operations which
, shall contain the following information:
(1) Date (2) Location of pour (portion of setucture) (3) Class and amount )f concrete placed (4) Number and identilication of test cylinders made 1533 092
~ ^- 13 II. PROCEDURES (Continued)
B. Field Tests (Continued)
- 5. Field Inspection of Concrete (Continued)
- h. (Continued)
(5) List of trucks with the time, water added at pour site, slump, concrete temperature, and total mixing 1. data for all loads, accepted or rejected. (6)' Results of air concent checks and temperatures of concrete. (7) Weather conditions including ambient temperature extremes and recorded relative humidity. (8) Time of beginning and end of pour (9) Unusual conditions such as rejections or other remarks pertinent to the pour.
- 6. Cadwald Inspection - Cadwelding in the containment' structure shall be inspected by a representative of the T.L. as follows:
- a. No Cadwelding will be permitted if the relative humidity is over 80%. 1.
- b. Sleeves and crucibles chall be checked for cleanliness, -
rust, etc.
- c. Holds to be preheated when necessary (new mold or change '
of shift).
- d. Bar ends shall be free from loose mill scale, rust, and moisture.
- e. Bars shall not be scarfed.
- f. Bars shall be marked by center-punching or other suitable means, so that assurance of centering ends within the sleeve may be made.
- g. Completed splices shall be v:sually inspected in accord-ance with the following procedure. Any splice which, in the judgment'of the inspector does not pass visual inspec-tion, shall be cut out and replaced.
(1) Properly made splices will have filler metal visible at both ends of the sleeve and at the top hole in the center of the sleeve. F'9 suu QO3-
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I
I. PROCEDURE
S (Continued) B., Field Tests (Continued)
- 6. Cadweld Inspection (Continued)
- g. (Contittued) -
(2) F 11er. metal need not flow to the very edge of the sleeve due te the gasket action of the asbestos wicking used to seal in the molten filler metal. (3) As a result of the Cadweld process, a shrinkage bubble may lie visible at the top hole, where the molten metal is introduced and shrinkage fissures and pinholes may be visible at the top of a verti-cal splice. These casting flows do not adversely ' affect the physical performance of the splice and therefore do not constitute cause for rejection.
- h. Random samples of visually acceptable splices at a rate to be specified by the Engineer shall be selected, cut from the structure and tested in tension t.a destruction.
- i. For each Cadweld splice, data shall be recorded on rebar data sheets showing:
(1) Splice number (This number shall also be applied to the splicing sleeve using a heat.and seather resis-tant marking pencil..) (2) Location (3) Size and orientation of the splice (4) Operator number (crew number) (5) Date, weather conditions, and time the splice was made. (6) Inspectors initials (7) Sample number and test result, if applicable.
- j. Failure of a tension test ot' a splice selected from the structure r s in "h" above-(:est result less than 70,000 psi)
.,will be cat.se for additional sampling. The next previous or subseqt. int splice made by the source operator shall be cut from the structure and t:ested in tensiot to destruction.
If this et it result is over 10,000 psi the ,irocess will be considered in control. If tt.is splice also f ails, an engi-neering evaluation will be m.ide, during which time the operator / crew responsible shall discontinue Cadwelding.
. 1538 094
s.
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II. PROCEDURES (Continued) C. Periodi Sampling and Production Testina:
- 1. Cement -i The T.L. will sample cement from each manufacturer
- when a new silo is used. These samples will be tested for physical'and chemical properties in accordance with ASTM C150-
- 66. Tests conducted need not be limited to the field laboratory.
- 2. Concretehggregates-Aggregatesdeliveredtothesitewillbe sampled by the T.L. at least once for every 250 tons used and tested for gradation and determination of fineness modulus, specific gravity, and absorption. These tests shall be con-ducted in the' field laboratory per test methods and acceptance standards as noted above in Preliminary Tests. Records will be esintained indicating date of receipt, amount received,.grada-tion test results, and disposition of rejected loads.
- 3. Concrete Cylinders - Af ter sufficient field-curing (usually 24 hours) the cylinders made by the T.L. field inspector will be transported to the field laboratory for stripping and curing and capping in accordance with ASTM C192-66. Two cylinders from each set will be tested at age 7 days, 2 at age 28 days, and 2 at age 90 days. Two additional cylinders will be tested at age 56 days for 5000 psi concrete. Compression tests of cylindtrs will be evaluated in accordance with Chapter 17 of ACI 301-66.
- 4. Cadweld Splices - Will be tested in cension in accordance with procedures outlined and referenced in ASTM A408 (minimum ulti-mate strength of specimen - 70,000 psi). These tests need -
not be performed in the field laboratory.
- 5. Other tests shall be performed as noted elsewhere in these procedures.
D. Other Items and Inspections
- 1. Concrete curing shall be as stipulated by the Engineer in the Specification SP 5406, Section 1:15. The reactor mat, floor bulkheads, walls and piers will be scripped in two days. Other forms will be stripped per SP 5406, Section 1:09.6.
- 2. The exterior f 3 us riquired for the wall of the Reactor Building are designed so as r.>t to impose undue ferees on the steel liner and so that the deflaccion of the liner, if any, will not exceed permitted tolerance (h" in any 10 feet of are).
1Fr9 nqr isVU U/3
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0 fD I
I. PROCEDURE
S (Concinued) D. Other Items and Insnoctions (Continued)
- 3. Visual inspeccion shc;l be made by the concrete supervisor and checked by cha T.L. innpecter or UE&C Quality Control group of the conGtion. pl.w . ..~ ' n of miscell.ncous items; i.c. , cc.nscruction joinc material, expansion joints, water stops, anchor boles, pipe sleeves, floor hardener, wiring compounds, grouc and grouting, vapor barrier, insula-tion, and waterproofing. Such inspection shall be documenced by the Concrece Placement Checkouc Sheet.
- 4. The mixing water (including ice) shall be checked weekly to assure that it does not contain c. ore chan 100 ppm each of chlorides. sulfides, and nitrates and that its turbidity does not exceed 2000 ppa. Ac che same time, its pocability will be checked.
- 5. . Cold Weather Protection - Provisions for cold weather protec-tion shall be made by use of: insulated forms / covers, camp-orary enclosures, indirect heaters and/or combination of afore-mencioned techniques.
- 6. A commercial concrece supplier will be recained to act as a "back-up" supplier in the event of a breakdown of the on-site batch planc or if additional concrece deliveries are needed during large pours. Field construction and inspeccion proce-dures will be as noced in II.B.S. above. Batch planc inspec-cion will be as noted in II.B.4. above, except that the prime responsibility for batch planc quality control will rest with the supplier with continuous surveillance maintained by a ,
T.L. inspector. Back-up supplier may withhold any or all mix-ing water from the load which may be added ac the pour site subject to all other provisions of II.B.1 and II.B. A above. ,2. Necessary adjusc=ents in inspeccion techniques will be made de-pending on the type of planc equipment in use (automatic wich-full recordation, automatic-interlocked, semi-aucomatic, or manual). When necessary, ice will be added by UE&C using the on-site facility. The supplier will submit a quality control procedure for review, comment, and approval by the UE&C Field Supervisor - Quality Control. E.' Recorcs and Records Reports of all activities of the T.L. inall be. presented to the UE&C Field Supervisor - Quality Contro for inclusion in the Quality Control file and distribution :s the Owner and Engineer, as required. o m 1 %. 8 u n!
I
I. PROCEDURE
S (Continued) E. Reports and ' Records (Continued) Completed records to be maintained shall include:
- 1. Batch tickets
- 2. Concrete Placement Checkout Sheets
- 3. Daily Summary Report of Batch Plant Activities .
- 4. Daily Summary Report of Concrete Field Operations
- 5. Records of Disposition of Rejected Loads of Concrets
- 6. Rebar Data Sheets
- 7. Records of all test results
- 8. Results of Receipt Inspection of reinforcing steel, coarse aggregate, and fine aggregate.
- 9. Results of water analyses Copies of the recorder tapes for each load shall be on file at the batch plant.
Ionghand written copies of reports of activities and tests shall be presented to the Field Supervisor - Quality Control no later than the morning of the work day following execution of the work. F. Deficiencies Results of all tests or inspections that do not meet specifica-tion requirements shall be immediately reported to the Field Supervisor - Quality Control who shall inform the UE&C General Superintendent and appropriate corrective action taken. In the event of a disagreement between the Field Supervisor - Quality , Control and the General Superintendent as to remedial actions or measures required to bring production within standard Quality Con-trol and the limits of the engineering specifications, it is then the duty of.the Field Supervisor - Quality Control to inform the Construction Manager and request compliance. Final recourse for action by the Field Supervisor - Quality Control shall be to in-form the Manager of Raliability and Quality Assurance in the Home Office. A Home Office decision shall then be made for the disposi-tion and corrective action to be taken. G. Ch ange,s Any changes to this procedure shall be approved in wrief.ng by the Engineer and UE&C Construction Superintendent and Field Supervisor - Quality Control prior to their implementation. UE&C shall be re-sponsible for providing up-dated copies ' ~ che revised procedure to the parties concerned. 15u3 057
UNITED ENGINEERS & CONSTRUCTORS INC. METROPOLITAN EDISON COMPANY THPJtE MILE ISLAND NUCLEAR STATION
. UNIT NO. 1
. CONCRETE PLACEMENT CHECKOUT SHEET Area: Date:
Concrete Type: J.O. Nc. 9459.01 Cement Manufacturer: Computed Quantity: Specific Location: CRAFT SUPERVISOR UE&C Subcontractor
- 1. Surf ace Preparation
- 2. Forms
- 3. Reinforced Steel
- 4. Sleeves & Blockouts
- 5. Embedded Misc. Iron
- 6. Anchor Bolta ,
- 7. Piping
- 8. Electrical
- 9. Line and Grade
- 10. Field Engineer or Area Superintendent
- 11. Quality Control NOTE: All items must be initialed prior to pour.
General Foreman tu check with Job Engineer. og 2g Supt. of Construction
\suU Pour Release Approved:
Distribution: Batch Plant Quality Control
.r U. S. Testing File Job Engineer Date
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