W9128A-19-B-0002_Specifications_(Part_4_of_4).pdf

RENOVATI ON OF BUI LDI NG 3004, SCHOFI ELD BARRACKS, OAHU, HAWAI I BLDG3004

1. 6. 4 Repor t i ng of Qual i t y Assur ance Test Resul t s

Pr ovi de copi es of any t est r esul t s gener at ed f or qual i t y assur ance t o t he Cont r act or , Cont r act i ng Of f i cer , and concr et e suppl i er .

1. 6. 5 Act i on r equi r ed f or shot cr et e def ect s

Submi t r epai r of shot cr et e pr ocedur es f or def ect s f or t he Cont r act i ng Of f i cer ' s accept ance. Ref er t o t he par agr aph t i t l ed " REPAI R OF SHOTCRETE" f or det ai l s.

PART 2 PRODUCTS

2. 1 MATERIALS

2. 1. 1 Cement

Cement shal l compl y wi t h ASTM C150/ C150M Type I .

Submi t cement t est r epor t s showi ng manuf act ur i ng l ocat i on, and compl i ance wi t h appl i cabl e ASTM st andar ds.

2. 1. 2 Suppl ement ar y cement i t i ous mat er i al s

Suppl ement ar y cement i t i ous mat er i al s ( SCMs) shal l compl y wi t h ASTM C618 f or f l y ash and nat ur al pozzol ans.

Submi t suppl ement ar y cement i t i ous mat er i al s t ypes, t est r epor t s showi ng manuf act ur i ng l ocat i on, and compl i ance wi t h appl i cabl e ASTM st andar ds.

2. 1. 3 Aggregate

Aggr egat es shal l compl y wi t h ASTM C33/ C33M f or nor mal wei ght aggr egat es.

The combi ned aggr egat e gr adat i on shal l compl y wi t h gr adi ng No. 2 of

ASTM C1436.

Submi t aggr egat e sour ce, pr oducer s ' names, gr adat i ons, speci f i c gr avi t i es, compl i ance wi t h ASTM C33/ C33M, and evi dence t hat t hi s dat a i s not mor e t han 1 year ol d.

2. 1. 4 Water

Wat er shal l be pot abl e.

2. 1. 5 Admixtures

Admi xt ur es shal l compl y wi t h ASTM C1141/ C1141M or , f or hydr at i on cont r ol admi xt ur es, wi t h ASTM C494/ C494M.

Submi t admi xt ur e t ypes, br and names, pr oducer s, manuf act ur er ' s t echni cal dat a sheet s descr i bi ng t echni cal pr oper t i es and per f or mance i n shot cr et e and showi ng compat i bi l i t y wi t h each ot her and t he pr oj ect cement i t i ous materials.

2. 1. 6 Reinforcement

Fol l ow t he r equi r ement s i ncl uded i n t he cont r act document s as wel l as Sect i on 03 20 00. 00 10 CONCRETE REI NFORCI NG.

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Submi t mi l l cer t i f i cat e showi ng conf or mance f or r ei nf or ci ng st eel or wel ded wi r e r ei nf or cement .

2. 1. 7 Cur i ng mat er i al s

2. 1. 7. 1 Sheet mat er i al s

Sheet mat er i al s f or cur i ng shal l compl y wi t h ASTM C171.

2. 1. 7. 2 Cur i ng compounds

Cur i ng compounds shal l compl y wi t h ASTM C309 or ASTM C1315. Vol at i l e or gani c compounds ( VOC) cont ent shal l be i n compl i ance wi t h l ocal ai r qual i t y st andar ds i f t hose r equi r ement s ar e mor e st r i ngent .

2. 2 SHOTCRETE PROPERTI ES

2. 2. 1 Compr essi ve st r engt h

The compr essi ve st r engt h r equi r ed shal l be 4, 000 psi .

2. 2. 2 Wat er - cement i t i ous r at i o

The maxi mum w/ cm based on pr oj ect ser vi ce condi t i ons shal l be 0. 45.

2. 2. 3 Ai r cont ent

The per cent ai r cont ent of concr et e shal l be 4 per cent pl us or mi nus ( ±)

1. 0 per cent .

2. 3 MI XTURE PROPORTI ONS

Pr opor t i on shot cr et e mi xt ur e by mass compl yi ng wi t h ASTM C94/ C94M t o sat i sf y t he speci f i ed pr oper t i es. Submi t shot cr et e mi xt ur e pr opor t i ons.

Submi t t al s shal l show const i t uent pr opor t i ons by mass i n t he case of bat chi ng by wei ght or pr opor t i ons by vol ume i n t he case of vol umet r i c bat chi ng. Submi t wat er - cement i t i ous mat er i al s r at i o ( w/ cm) f or wet - mi xt ur e shotcrete.

2. 4 BATCHI NG, MI XI NG, AND DELI VERY

Bat ch, mi x, and del i ver wet - mi xt ur e shot cr et e i n accor dance wi t h ASTM C94/ C94M, ASTM C685/ C685M, or ASTM C1116/ C1116M as appl i cabl e.

PART 3 EXECUTI ON

3. 1 PREPARATI ON OF SURFACE TO RECEI VE SHOTCRETE

3. 1. 1 Concr et e, masonr y, and shot cr et e

Remove al l det er i or at ed, l oose, unsound mat er i al or cont ami nant s t hat wi l l i nhi bi t bondi ng. Recei v i ng sur f ace shal l be dampened and al l owed t o dr y t o a sat ur at ed sur f ace- dr y ( SSD) condi t i on j ust pr i or t o shot cr et e appl i cat i on. Fur t her sur f ace pr epar at i ons i ncl ude:

a. Chi ppi ng sur f aces t o r ecei ve shot cr et e t o r emove of f set s causi ng abr upt changes i n t hi ckness.

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b. Rougheni ng r ecei v i ng sur f aces t hat have been saw cut .

3. 1. 2 Reinforcement

3. 1. 2. 1 Sur f ace condi t i on

The sur f ace of t he r ei nf or cement shal l be f r ee of over spr ay or ot her del et er i ous mat er i al s t hat i nhi bi t devel opment of bond wi t h t he shot cr et e.

3. 1. 2. 2 Rei nf or cement l aps

Laps shal l be cont act . Wel ded spl i ces ar e per mi t t ed. Secur e r ei nf or cement t o pr event movement . The use of mechani cal spl i ces i s per mi t t ed when approved.

3. 1. 3 Forms

Use mat er i al of adequat e t hi ckness f or f or mwor k t o r esi st movement dur i ng shoot i ng. Rei nf or ce, secur e, and br ace f or ms t o mi ni mi ze t he ef f ect s of v i br at i on dur i ng shoot i ng. Const r uct f or ms t o al l ow escape of pl acement ai r , over spr ay, and r ebound. Use f or m- r el ease coat i ng mat er i al on r emovabl e f or ms unl ess t he f or med sur f ace i s t o subsequent l y r ecei ve an addi t i onal coat i ng.

3. 2 JOINTS

3. 2. 1 Const r uct i on j oi nt s

Taper const r uct i on j oi nt s at appr oxi mat el y 45 degr ees f r om r ecei v i ng sur f ace. For m j oi nt s by cut t i ng pl ast i c shot cr et e. Joi nt s at s l ab i nt er sect i ons shal l be made at 90 degr ees. Roughen shot cr et e i n t he j oi nt f ace whi l e i t i s st i l l pl ast i c. See st r uct ur al dr awi ngs f or addi t i onal requirements.

3. 3 ALI GNMENT CONTROL

To est abl i sh t hi ckness and pl ane of r equi r ed sur f ace, i nst al l t aut gr ound wi r es or ot her means t o gui de t he nozzl eman. I nst al l al i gnment cont r ol means at cor ner s or of f set s not est abl i shed by f or ms.

3. 4 APPLICATION

3. 4. 1 Pl acement t echni ques

a. Use t empor ar y cover i ngs t o pr ot ect adj acent sur f aces f r om t he deposi t of over spr ay or i mpact f r om t he nozzl e st r eam.

b. I nst al l suf f i c i ent l i ght i ng and vent i l at i on t o pr ovi de t he shot cr et e cr ew wi t h a c l ear v i ew of t he shoot i ng ar ea. Suspend Wor k and adopt cor r ect i ve measur es i f v i s i bi l i t y i s unsui t abl e f or t he appl i cat i on of qual i t y shot cr et e.

c. Pr ovi de a wor ki ng sur f ace t hat per mi t s nozzl emen unobst r uct ed access t o t he r ecei v i ng sur f ace. Pl ace shot cr et e f i r st i n cor ner s, r ecesses, and ot her ar eas wher e r ebound or over spr ay cannot easi l y escape.

d. The suppl y of shot cr et e mat er i al and ai r pr essur e at t he nozzl e shal l be uni f or m, pr ovi di ng a st eady, cont i nuous f l ow of shot cr et e wi t h no det r i ment al sur gi ng or pul s i ng. Mai nt ai n t he vel oci t y and consi st ency

SECTI ON 03 37 13 Page 9 of shot cr et e exi t i ng t he nozzl e at a uni f or m r at e appr opr i at e f or t he gi ven j ob condi t i ons so t hat sat i sf act or y mat er i al consol i dat i on and mi ni mum r ebound i s achi eved.

e. Pl ace shot cr et e per pendi cul ar t o t he r ecei v i ng sur f ace wi t h t he nozzl e hel d at such a di st ance t o pr oduce maxi mum consol i dat i on of t he shot cr et e and f ul l encapsul at i on of t he r ei nf or cement .

f . Shoot dr y- mi xt ur e shot cr et e mat er i al wi t hi n 45 mi n af t er bat chi ng or , i n t he case of pr epackaged mat er i al , wi t hi n 45 mi n af t er pr edampeni ng.

Shoot wet - mi xt ur e shot cr et e mat er i al wi t hi n t he t i me l i mi t s i n

ASTM C94/ C94M.

g. Appl y shot cr et e usi ng a c i r cul ar or el l i pt i cal mot i on of t he nozzl e whi l e bui l di ng t he r equi r ed t hi ckness.

h. Use suf f i c i ent mat er i al vel oci t y, mat er i al consi st ency, and di st ance f r om t he end of t he nozzl e t o t he r ecei v i ng sur f ace t o pr oduce maxi mum consol i dat i on of t he shot cr et e and f ul l encapsul at i on of t he r ei nf or ci ng st eel .

i . I n cor ner s, di r ect t he nozzl e t o bi sect t he cor ner angl e. Appl y shot cr et e so saggi ng or s l oughi ng does not occur . Wher e t her e i s pot ent i al f or accumul at ed r ebound or over spr ay mat er i al t o be i ncor por at ed i nt o t he Wor k at congest ed ar eas of st eel r ei nf or cement , embedded obst r uct i ons, cor ner s, and r ecesses, use a compr essed ai r bl ow pi pe t o r emove l oose mat er i al f r om t he Wor k.

j . Di scont i nue pl acement of shot cr et e or shi el d t he nozzl e st r eam i f wi nd causes separ at i on of i ngr edi ent s i n t he nozzl e st r eam.

k. Do not r euse r ebound or over spr ay i n t he Wor k.

l . Remove l ai t ance f r om shot cr et e sur f aces t hat ar e t o r ecei ve addi t i onal shot cr et e l ayer s.

m. Sur f ace pr epar at i on pr i or t o t he shoot i ng of shot cr et e shal l compl y wi t h t he par agr aph t i t l ed PREPARATI ON OF SURFACE TO RECEI VE SHOTCRETE.

n. Do not appl y shot cr et e t o sur f aces wi t h st andi ng or f l owi ng wat er .

o. Remove har dened over spr ay and r ebound f r om adj acent sur f aces, i ncl udi ng exposed r ei nf or cement .

3. 4. 2 I nt er medi at e sur f aces

a. When appl y i ng mor e t han one l ayer of shot cr et e, use a cut t i ng r od, br ush wi t h a st i f f br i st l e, or ot her sui t abl e equi pment t o r emove al l l oose mat er i al , over spr ay, l ai t ance, or ot her mat er i al t hat may compr omi se t he bond of t he subsequent l ayer of shot cr et e. Conduct r emoval i mmedi at el y af t er shot cr et e r eaches i ni t i al set .

b. Al l ow shot cr et e t o st i f f en suf f i c i ent l y bef or e appl y i ng subsequent l ayer s. I f shot cr et e has har dened, c l ean t he sur f ace of al l l oose mat er i al , l ai t ance, over spr ay, or ot her mat er i al t hat may compr omi se t he bond of subsequent l ayer s. Br i ng t he sur f ace t o a sat ur at ed sur f ace- dr y condi t i on at t he t i me of appl i cat i on of t he next l ayer of shotcrete.

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3. 4. 3 Encasement of r ei nf or cement

a. Pl ace shot cr et e t o encase r ei nf or cement and ot her embedment s, and pr ovi de a mi ni mum cover as i ndi cat ed.

b. Adj ust ai r vol ume, mat er i al f eed vol ume, and di st ance of t he nozzl e f r om t he Wor k as necessar y t o encase r ei nf or cement .

c. Keep t he f r ont f ace of t he r ei nf or cement c l ean dur i ng shoot i ng oper at i ons so t hat shot cr et e bui l ds up f r om behi nd t o encase t he r ei nf or cement wi t hout t he f or mat i on of shadows or voi ds.

d. Shot cr et e cr ew shal l cont i nuousl y r emove accumul at i ons of r ebound and over spr ay usi ng a compr essed ai r bl owpi pe, or ot her sui t abl e devi ce, i n advance of deposi t i on of new shot cr et e.

3. 4. 4 Hot weat her shot cr et i ng

Do not pl ace shot cr et e when shot cr et e t emper at ur e i s above 95° F. The t emper at ur e of r ei nf or cement and r ecei v i ng sur f aces shal l be bel ow 90º F pr i or t o shot cr et e pl acement .

3. 5 FINISH

3. 5. 1 Cut t i ng Scr eed

Af t er t he sur f ace has t aken i t s i ni t i al set ( cr umbl i ng s l i ght l y when cut ) , excess mat er i al out s i de t he f or ms and gr ound wi r es shal l be s l i ced of f wi t h a downwar d cut t i ng mot i on usi ng a shar p- edged cut t i ng scr eed. The gr ound wi r es shal l t hen be r emoved and t he i r r egul ar i t i es f l oat ed. "

3. 5. 2 Tr owel Fi ni sh

Fi nal sur f ace f i ni sh shal l be pr ovi ded usi ng st eel t r owel . Tr owel i ng of t hi n sect i ons of shot cr et e shal l be avoi ded unl ess bot h t r owel i ng and commencement of moi st ur e cur i ng t ake pl ace wi t hi n a r el at i vel y shor t per i od af t er pl acement of shot cr et e.

3. 6 CURING

When t he dai l y mean t emper at ur e i s above 40° F, cur i ng shal l be cont i nuous f or a mi ni mum of 7 consecut i ve days or f or t he t i me necessar y t o at t ai n 70 per cent of t he speci f i ed compr essi ve or f l exur al st r engt h, whi chever per i od i s l ess. I f shot cr et e i s pl aced wi t h dai l y mean t emper at ur es 40° F or l ower , col d weat her pr ot ect i on shal l be pr ovi ded unt i l t he shot cr et e achi eves 70 per cent of t he speci f i ed st r engt h.

Compl et e moi st cur i ng by one of t he f ol l owi ng met hods:

a. Pondi ng or cont i nuous spr i nkl i ng f or a mi ni mum of 7 days;

b. Cover i ng wi t h an absor pt i ve mat or sand t hat i s kept cont i nuousl y wet ;

c. Cover i ng wi t h i mper vi ous sheet mat er i al ;

d. Use of cur i ng compounds; appl y t wi ce t he r at e f or f or med sur f aces as r ecommended by manuf act ur er i f t he sur f ace i s a gun f i ni sh.

Do not use nat ur al cur i ng i n l i eu of t hat speci f i ed i n t hi s par agr aph

SECTI ON 03 37 13 Page 11 unl ess t he r el at i ve humi di t y of t he ai r i n cont act wi t h t he shot cr et e r emai ns at or above 85 per cent and such cur i ng i s aut hor i zed by Cont r act i ng Of f i cer .

Submi t cur i ng mat er i al s and cur i ng pr ocedur es f or shot cr et e i ncl udi ng pr oduct dat a sheet s i ndi cat i ng conf or mance wi t h speci f i cat i on r equi r ement s.

3. 7 PROTECTION

I mmedi at el y af t er pl acement , pr ot ect shot cr et e f r om pr emat ur e dr yi ng or excessi vel y hot or col d t emper at ur es and mechani cal i nj ur y.

Mai nt ai n shot cr et e pr ot ect i on t o pr event f r eezi ng of t he shot cr et e and t o ensur e t he necessar y st r engt h devel opment f or st r uct ur al saf et y. Remove pr ot ect i on i n such a manner t hat t he maxi mum decr ease i n t emper at ur e measur ed at t he sur f ace of t he shot cr et e i n a 24- hour per i od shal l not exceed t he f ol l owi ng:

a. 50° F f or sect i ons l ess t han 12 i n. i n t he l east di mensi on;

b. 40° F f or sect i ons f r om 12 t o 36 i n. i n t he l east di mensi on.

Pr ot ect sur f aces not i nt ended f or shot cr et e pl acement agai nst deposi t of r ebound and over spr ay or i mpact f r om nozzl e st r eam.

3. 8 TOLERANCES

Di mensi onal t ol er ances of shot cr et e shal l compl y wi t h t he cont r act document .

3. 9 REPAI R OF SHOTCRETE

3. 9. 1 General

a. Submi t r epai r pr ocedur e f or shot cr et e def ect s f or t he Cont r act i ng Of f i cer ' s accept ance. The submi t t al shal l i ncl ude pr oposed mat er i al s, sur f ace pr epar at i on, bondi ng pr ocedur es, and f i nal sur f ace f i ni sh.

b. Remove voi ds, shadows, saggi ng, or ot her def ect s i n t he har dened shot cr et e usi ng l i ght - dut y chi ppi ng hammer s maxi mum 18 l b f ol l owed by hi gh- pr essur e wat er bl ast i ng or gr i t bl ast i ng t o r emove br ui sed shot cr et e sur f ace.

c. Conduct r emoval of def ect i ve shot cr et e wi t hout t he cr eat i on of f eat her edges.

d. I n t he r epai r of cor e hol e sur f aces and saw cut edges, r oughen t he cor e hol e or cut sur f ace and pr edampen pr i or t o r epai r .

3. 9. 2 Shot cr et e r epai r wi t h commer ci al pat chi ng pr oduct s

Repai r shot cr et e wi t h commer ci al pat chi ng pr oduct s, i ncl udi ng:

a. Por t l and cement mor t ar , modi f i ed wi t h a l at ex bondi ng agent conf or mi ng to ASTM C1059/ C1059M, Type I I ;

b. Packaged, dr y concr et e r epai r mat er i al s conf or mi ng t o ASTM C928/ C928M.

3. 9. 3 Removal of st ai ns, r ust , ef f l or escence, and sur f ace deposi t s

Remove st ai ns, r ust , ef f l or escence, and sur f ace deposi t s consi der ed

SECTI ON 03 37 13 Page 12 obj ect i onabl e by Cont r act i ng Of f i cer by met hods accept abl e t o t he Cont r act i ng Of f i cer .

3. 10 ACCEPTANCE OF WORK

3. 10. 1 General

a. Remove and r epl ace def ect i ve ar eas l ar ger t han 48 squar e i nches or 2 i nches deep. Def ect s i n shot cr et e i ncl ude honeycombi ng, l ami nat i ons, dr y pat ches, voi ds, or sand pocket s. Def ect i ve ar eas shal l be r emoved i n accor dance wi t h t he pr ocedur es descr i bed i n par agr aph t i t l ed

" REPAI R OF SHOTCRETE" .

b. Shot cr et e Wor k t hat meet s speci f i cat i ons shal l be accept ed.

c. Shot cr et e Wor k t hat has pr evi ousl y f ai l ed t o meet one or mor e r equi r ement s, but has been r epai r ed t o br i ng i t i nt o compl i ance shal l be accept ed.

d. Shot cr et e Wor k t hat f ai l s t o meet one or mor e r equi r ement s and t hat cannot be br ought i nt o compl i ance shal l be ei t her accept ed or r ej ect ed by Cont r act i ng Of f i cer . Modi f i cat i ons t o t he mi xt ur e pr opor t i ons or t he shot cr et i ng pr ocedur es shal l be i mpl ement ed t o assur e t hat r emai ni ng Wor k compl i es wi t h t he r equi r ement s.

e. The basi s f or accept ance or r ej ect i on of shot cr et e pr oper t i es shal l be t he speci f i ed compr essi ve or f l exur al st r engt h. When addi t i onal cr i t er i a, pr oper t i es, or bot h ar e r equi r ed i n t he cont r act document s, accept ance cr i t er i a shal l i ncl ude compl i ance wi t h t hose r equi r ement s.

3. 10. 2 Compl i ance wi t h t est pr oper t i es

3. 10. 2. 1 Compr essi ve st r engt h

Consi der t he compr essi ve st r engt h adequat e i f t he aver age of t he t hr ee cor es f r om a t est panel or f r om i n- pl ace shot cr et e exceeds 85 per cent of t he speci f i ed compr essi ve st r engt h and no si ngl e cor e i s l ess t han 75 per cent of t he speci f i ed compr essi ve st r engt h.

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SECTI ON TABLE OF CONTENTS

DI VI SI ON 03 - CONCRETE

SECTI ON 03 39 00. 00 10

CONCRETE CURI NG

PART 1 GENERAL

1. 1 REFERENCES

1. 2 SUBMI TTALS

1. 3 DELI VERY, STORAGE, AND HANDLI NG

PART 2 PRODUCTS

2. 1 CURI NG MATERI ALS

2. 2 WATER

PART 3 EXECUTI ON

3. 1 CURI NG AND PROTECTI ON

3. 2 TESTI NG AND I NSPECTI ON FOR CQC

3. 2. 1 Moi st Cur i ng I nspect i ons

3. 2. 2 Moi st Cur i ng Cor r ect i ve Act i one

3. 2. 3 Membr ane Cur i ng I nspect i on

3. 2. 4 Membr ane Cur i ng Cor r ect i ve Act i on

3. 2. 5 Sheet Cur i ng I nspect i on

3. 2. 6 Sheet Cur i ng Cor r ect i ve Act i on

- - End of Sect i on Tabl e of Cont ent s - -

SECTI ON 03 39 00. 00 10 Page 1

SECTI ON 03 39 00. 00 10

CONCRETE CURI NG

PART 1 GENERAL

1. 1 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o wi t hi n t he t ext by t he basi c desi gnat i on onl y.

AMERI CAN CONCRETE I NSTI TUTE I NTERNATI ONAL ( ACI )

ACI 301 ( 2016) Speci f i cat i ons f or St r uct ur al Concrete

ACI 308. 1 ( 2011) Speci f i cat i on f or Cur i ng Concr et e

ASTM I NTERNATI ONAL ( ASTM)

ASTM C1602/ C1602M ( 2012) St andar d Speci f i cat i on f or Mi xi ng Wat er Used i n Pr oduct i on of Hydr aul i c Cement Concr et e

1. 2 SUBMITTALS

Gover nment appr oval i s r equi r ed f or submi t t al s wi t h a " G" desi gnat i on;

submi t t al s not havi ng a " G" desi gnat i on ar e f or i nf or mat i on onl y. Submi t t he f ol l owi ng i n accor dance wi t h Sect i on 01 33 00 SUBMI TTAL PROCEDURES:

SD- 03 Pr oduct Dat a

Cur i ng Mat er i al s

SD- 06 Test Repor t s

Test i ng and I nspect i on f or CQC

SD- 08 Manuf act ur er ' s I nst r uct i ons

Cur i ng Compound

1. 3 DELI VERY, STORAGE, AND HANDLI NG

St or e mat er i al s i n such a manner as t o avoi d cont ami nat i on and det er i or at i on. Mat er i al s must be capabl e of bei ng accur at el y i dent i f i ed af t er bundl es or cont ai ner s ar e opened.

PART 2 PRODUCTS

2. 1 CURI NG MATERI ALS

Pr ovi de cur i ng mat er i al s i n accor dance wi t h ACI 301 Sect i ons 5 and ACI 308. 1 Sect i on 2. Submi t pr oduct dat a and manuf act ur er ' s i nst r uct i ons

SECTI ON 03 39 00. 00 10 Page 2 f or concr et e cur i ng compound.

2. 2 WATER

Pr ovi de wat er f or cur i ng t hat i s f r esh, c l ean, pot abl e, and f r ee of i nj ur i ous amount s of oi l , aci d, sal t , or al kal i , except t hat non- pot abl e wat er may be used i f i t meet s t he r equi r ement s of ASTM C1602/ C1602M.

PART 3 EXECUTI ON

3. 1 CURI NG AND PROTECTI ON

Cur e and pr ot ect concr et e i n accor dance wi t h ACI 301 Sect i on 5.

3. 2 TESTI NG AND I NSPECTI ON FOR CQC

Per f or m t he i nspect i on and t est s descr i bed bel ow and, based upon t he r esul t s of t hese i nspect i ons and t est s, t ake t he act i on r equi r ed. Submi t cer t i f i ed copi es of l abor at or y t est r epor t s, i ncl udi ng cur i ng compound pr oposed f or use on t hi s pr oj ect .

3. 2. 1 Moi st Cur i ng I nspect i ons

At l east once each shi f t , and not l ess t han t wi ce per day on bot h wor k and non- wor k days, i nspect al l ar eas subj ect t o moi st cur i ng. Not e and r ecor d t he sur f ace moi st ur e condi t i on.

3. 2. 2 Moi st Cur i ng Cor r ect i ve Act i one

When a dai l y i nspect i on r epor t l i s t s an ar ea of i nadequat e cur i ng, t ake i mmedi at e cor r ect i ve act i on, and ext end t he r equi r ed cur i ng per i od f or t hose ar eas by 1 day.

3. 2. 3 Membr ane Cur i ng I nspect i on

Appl y no cur i ng compound unt i l t he Cont r act or has ver i f i ed t hat t he compound i s pr oper l y mi xed and r eady f or spr ayi ng. At t he end of each oper at i on, est i mat e t he quant i t y of compound used by measur ement of t he cont ai ner and t he ar ea of concr et e sur f ace cover ed, comput e t he r at e of cover age i n squar e f eet / gal l on, and not e whet her or not cover age i s uniform.

3. 2. 4 Membr ane Cur i ng Cor r ect i ve Act i on

When t he cover age r at e of t he cur i ng compound i s l ess t han t hat speci f i ed or when t he cover age i s not uni f or m, spr ay t he ent i r e sur f ace agai n.

3. 2. 5 Sheet Cur i ng I nspect i on

At l east once each shi f t and once per day on non- wor k days, i nspect i on al l ar eas bei ng cur ed usi ng i mper vi ous sheet s. Not e and r ecor d t he condi t i on of t he cover i ng and t he t i ght ness of t he l aps and t apes.

3. 2. 6 Sheet Cur i ng Cor r ect i ve Act i on

When a dai l y i nspect i on r epor t l i s t s any t ear s, hol es, or l aps or j oi nt s t hat ar e not compl et el y c l osed, pr ompt l y r epai r t he t ear s and hol es or r epl ace t he sheet s, c l ose t he j oi nt s, and ext end t he r equi r ed cur i ng per i od f or t hose ar eas by 1 day.

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DI VI SI ON 03 - CONCRETE

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PLANT- PRECAST CONCRETE PRODUCTS FOR BELOW GRADE CONSTRUCTI ON

PART 1 GENERAL

1. 1 REFERENCES

1. 2 SUBMI TTALS

1. 3 QUALI TY ASSURANCE

1. 3. 1 NPCA and ACPA Pl ant Cer t i f i cat i on

1. 3. 2 Qual i f i cat i ons, Qual i t y Cont r ol and I nspect i on

1. 3. 2. 1 Qual i f i cat i ons

1. 3. 2. 2 Qual i t y Cont r ol Pr ocedur es

1. 3. 2. 2. 1 Sl ump

1. 3. 2. 2. 2 Temper at ur e

1. 3. 2. 2. 3 Compr essi ve St r engt h

1. 3. 2. 2. 4 Ai r Cont ent

1. 3. 2. 2. 5 Uni t Wei ght

1. 3. 2. 3 I nspect i on

1. 3. 2. 4 Test Repor t s

1. 3. 2. 4. 1 Mat er i al Cer t i f i cat i ons or Labor at or y Test Repor t s

1. 3. 2. 4. 2 Mi x Test

1. 3. 2. 4. 3 Sel f - Consol i dat i ng Concr et e

1. 3. 2. 4. 4 I n- Pl ant QA/ QC I nspect i on Repor t s

1. 4 DELI VERY, STORAGE, AND HANDLI NG

1. 4. 1 Del i ver y

1. 4. 2 St or age

1. 4. 3 Handl i ng

PART 2 PRODUCTS

2. 1 SYSTEM DESCRI PTI ON

2. 1. 1 St andar d Pr ecast Uni t s

2. 1. 2 Cust om- Made Pr ecast Uni t s

2. 1. 3 Pr opr i et ar y Pr ecast Uni t s

2. 1. 4 Joi nt s and Seal ant s

2. 1. 5 Concr et e Mi x Desi gn

2. 1. 5. 1 Concr et e Mi x Pr opor t i ons

2. 1. 5. 2 Concr et e St r engt h

2. 1. 5. 3 Wat er - t o- Cement Rat i o

2. 2 MATERI ALS

2. 2. 1 Pi gment s

2. 2. 2 Rei nf or cement

2. 2. 2. 1 Rei nf or ci ng Bar s

2. 2. 2. 2 Rei nf or ci ng Wi r e

2. 2. 2. 3 Wel ded Wi r e Rei nf or cement

2. 2. 2. 4 Epoxy Coat ed Rei nf or cement

2. 2. 2. 5 Gal vani zed Rei nf or cement

2. 2. 3 I nser t s and Embedded Met al

2. 2. 4 Accessor i es

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2. 2. 5 Pi pe Ent r y Connect or s

2. 2. 6 Gr out

PART 3 EXECUTI ON

3. 1 FABRI CATI ON AND PLACEMENT

3. 1. 1 For ms

3. 1. 2 Rei nf or cement

3. 1. 3 Embedded I t ems

3. 2 CONCRETE

3. 2. 1 Concr et e Mi xi ng

3. 2. 2 Concr et e Pl aci ng

3. 2. 2. 1 Hot Weat her Concr et i ng

3. 2. 3 Concr et e Cur i ng

3. 2. 3. 1 Cur i ng by Moi st ur e Ret ent i on

3. 2. 3. 2 Cur i ng wi t h Heat and Moi st ur e

3. 2. 4 Sur f ace Fi ni sh

3. 2. 4. 1 For med Non- Ar chi t ect ur al Sur f aces

3. 2. 4. 2 Unf or med Sur f aces

3. 2. 4. 3 Speci al Fi ni shes

3. 2. 5 St r i ppi ng Pr oduct s f r om For ms

3. 2. 6 Pat chi ng and Repai r

3. 2. 6. 1 Repai r i ng Mi nor Def ect s

3. 2. 6. 2 Repai r i ng Honeycombed Ar eas

3. 2. 6. 3 Repai r i ng Maj or Def ect s

3. 2. 7 Shi ppi ng Pr oduct s

3. 3 I NSTALLATI ON

3. 3. 1 Si t e Access

3. 3. 2 Gener al Requi r ement s

3. 3. 3 Wat er Ti ght ness

3. 4 FI ELD QUALI TY CONTROL

3. 4. 1 Si t e Test s

3. 4. 2 Vacuum Test i ng

3. 4. 3 Wat er Test i ng

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PLANT- PRECAST CONCRETE PRODUCTS FOR BELOW GRADE CONSTRUCTI ON

PART 1 GENERAL

1. 1 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o wi t hi n t he t ext by t he basi c desi gnat i on onl y.

AMERI CAN CONCRETE I NSTI TUTE I NTERNATI ONAL ( ACI )

ACI 211. 1 ( 1991; R 2009) St andar d Pr act i ce f or Sel ect i ng Pr opor t i ons f or Nor mal , Heavywei ght and Mass Concr et e

ACI 211. 2 ( 1998; R 2004) St andar d Pr act i ce f or Sel ect i ng Pr opor t i ons f or St r uct ur al Li ght wei ght Concr et e

ACI 305R ( 2010) Gui de t o Hot Weat her Concr et i ng

ACI 318 ( 2014; Er r at a 1- 2 2014; Er r at a 3- 5 2015;

Er r at a 6 2016; Er r at a 7 2017) Bui l di ng Code Requi r ement s f or St r uct ur al Concr et e and Comment ar y

AMERI CAN CONCRETE PI PE ASSOCI ATI ON ( ACPA)

ACPA QPC ( 202016) QCast Pl ant Cer t i f i cat i on Manual

AMERI CAN WELDI NG SOCI ETY ( AWS)

AWS D1. 1/ D1. 1M ( 2015; Er r at a 1 2015; Er r at a 2 2016) St r uct ur al Wel di ng Code - St eel

AWS D1. 4/ D1. 4M ( 2011) St r uct ur al Wel di ng Code - Rei nf or ci ng St eel

ASTM I NTERNATI ONAL ( ASTM)

ASTM A1064/ A1064M ( 2017) St andar d Speci f i cat i on f or Car bon- St eel Wi r e and Wel ded Wi r e Rei nf or cement , Pl ai n and Def or med, f or Concrete

ASTM A153/ A153M ( 2016) St andar d Speci f i cat i on f or Zi nc Coat i ng ( Hot - Di p) on I r on and St eel Hardware

ASTM A36/ A36M ( 2014) St andar d Speci f i cat i on f or Car bon St r uct ur al St eel

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ASTM A615/ A615M ( 2016) St andar d Speci f i cat i on f or Def or med and Pl ai n Car bon- St eel Bar s f or Concr et e Reinforcement

ASTM A706/ A706M ( 2016) St andar d Speci f i cat i on f or Low- Al l oy St eel Def or med and Pl ai n Bar s f or Concr et e Rei nf or cement

ASTM A767/ A767M ( 2016) St andar d Speci f i cat i on f or Zi nc- Coat ed ( Gal vani zed) St eel Bar s f or Concr et e Rei nf or cement

ASTM A775/ A775M ( 2016) St andar d Speci f i cat i on f or Epoxy- Coat ed St eel Rei nf or ci ng Bar s

ASTM A884/ A884M ( 2014) St andar d Speci f i cat i on f or Epoxy- Coat ed St eel Wi r e and Wel ded Wi r e Reinforcement

ASTM C1064/ C1064M ( 2011) St andar d Test Met hod f or Temper at ur e of Fr eshl y Mi xed Hydr aul i c- Cement Concr et e

ASTM C1107/ C1107M ( 2014a) St andar d Speci f i cat i on f or Packaged Dr y, Hydr aul i c- Cement Gr out (Nonshrink)

ASTM C1244 ( 2011; R 2017) St andar d Test Met hod f or Concr et e Sewer Manhol es by t he Negat i ve Ai r Pr essur e ( Vacuum) Test Pr i or t o Backfill

ASTM C138/ C138M ( 2017a) St andar d Test Met hod f or Densi t y ( Uni t Wei ght ) , Yi el d, and Ai r Cont ent ( Gr avi met r i c) of Concr et e

ASTM C143/ C143M ( 2015) St andar d Test Met hod f or Sl ump of Hydr aul i c- Cement Concr et e

ASTM C1478 ( 2008; R 2013) St andar d Speci f i cat i on f or St or m Dr ai n Resi l i ent Connect or s Bet ween Rei nf or ced Concr et e St or m Sewer St r uct ur es, Pi pes and Lat er al s

ASTM C171 ( 2016) St andar d Speci f i cat i on f or Sheet Mat er i al s f or Cur i ng Concr et e

ASTM C173/ C173M ( 2016) St andar d Test Met hod f or Ai r Cont ent of Fr eshl y Mi xed Concr et e by t he Vol umet r i c Met hod

ASTM C192/ C192M ( 2016a) St andar d Pr act i ce f or Maki ng and Cur i ng Concr et e Test Speci mens i n t he Laboratory

ASTM C231/ C231M ( 2017) St andar d Test Met hod f or Ai r Cont ent of Fr eshl y Mi xed Concr et e by t he Pr essur e Met hod

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ASTM C309 ( 2011) St andar d Speci f i cat i on f or Li qui d Membr ane- For mi ng Compounds f or Cur i ng Concrete

ASTM C31/ C31M ( 2015a; E 2016) St andar d Pr act i ce f or Maki ng and Cur i ng Concr et e Test Speci mens i n t he Fi el d

ASTM C39/ C39M ( 2017) St andar d Test Met hod f or Compr essi ve St r engt h of Cyl i ndr i cal Concr et e Speci mens

ASTM C443 ( 2012; R 2017) St andar d Speci f i cat i on f or Joi nt s f or Concr et e Pi pe and Manhol es, Usi ng Rubber Gasket s

ASTM C858 ( 2010; E 2012) St andar d Speci f i cat i on f or Under gr ound Pr ecast Concr et e Ut i l i t y Structures

ASTM C877 ( 2008) Ext er nal Seal i ng Bands f or Concr et e Pi pe, Manhol es, and Pr ecast Box Sect i ons

ASTM C891 ( 2011) I nst al l at i on of Under gr ound Pr ecast Concr et e Ut i l i t y St r uct ur es

ASTM C920 ( 2014a) St andar d Speci f i cat i on f or El ast omer i c Joi nt Seal ant s

ASTM C923 ( 2008; R 2013; E 2016) St andar d Speci f i cat i on f or Resi l i ent Connect or s Bet ween Rei nf or ced Concr et e Manhol e St r uct ur es, Pi pes and Lat er al s

ASTM C990 ( 2009; R 2014) St andar d Speci f i cat i on f or Joi nt s f or Concr et e Pi pe, Manhol es and Pr ecast Box Sect i ons Usi ng Pr ef or med Fl exi bl e Joi nt Seal ant s

CSA GROUP ( CSA)

CSA A23. 4 ( 2016; Er r at a 2016) Pr ecast Concr et e - Mat er i al s and Const r uct i on

NATI ONAL PRECAST CONCRETE ASSOCI ATI ON ( NPCA)

NPCA QC Manual ( 2012) Qual i t y Cont r ol Manual f or Pr ecast and Pr est r essed Concr et e Pl ant s

1. 2 SUBMITTALS

Al l submi t t al s ar e t he r esponsi bi l i t y of t he pr ecast concr et e pr oducer .

Gover nment appr oval i s r equi r ed f or submi t t al s wi t h a " G" desi gnat i on;

submi t t al s not havi ng a " G" desi gnat i on ar e f or i nf or mat i on onl y. ubmi t t he f ol l owi ng i n accor dance wi t h Sect i on 01 33 00 SUBMI TTAL PROCEDURES:

SD- 01 Pr econst r uct i on Submi t t al s

Qual i t y Cont r ol Pr ocedur es

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SD- 02 Shop Dr awi ngs

St andar d Pr ecast Uni t s; G Cust om- Made Pr ecast Uni t s; G

SD- 03 Pr oduct Dat a

St andar d Pr ecast Uni t s Pr opr i et ar y Pr ecast Uni t s Embedded I t ems Accessories

SD- 05 Desi gn Dat a

Desi gn Cal cul at i ons Concr et e Mi x Pr opor t i ons

SD- 06 Test Repor t s

Test Repor t s

SD- 07 Cer t i f i cat es

Qual i t y Cont r ol Pr ocedur es

1. 3 QUALI TY ASSURANCE

Demonst r at e adher ence t o t he st andar ds set f or t h i n NPCA QC Manual or ACPA QPC. Meet r equi r ement s wr i t t en i n t he subpar agr aphs bel ow.

1. 3. 1 NPCA and ACPA Pl ant Cer t i f i cat i on

The pr ecast concr et e pr oducer must be cer t i f i ed by t he Nat i onal Pr ecast Concr et e Associ at i on' s or t he Amer i can Concr et e Pi pe Associ at i on' s Pl ant Cer t i f i cat i on Pr ogr am pr i or t o and dur i ng pr oduct i on of t he pr oduct s f or t hi s pr oj ect .

1. 3. 2 Qual i f i cat i ons, Qual i t y Cont r ol and I nspect i on

1. 3. 2. 1 Qualifications

Sel ect a pr ecast concr et e pr oducer t hat has been i n t he busi ness of pr oduci ng pr ecast concr et e uni t s s i mi l ar t o t hose speci f i ed f or a mi ni mum of 3 year s. The pr ecast concr et e pr oducer must mai nt ai n a per manent qual i t y cont r ol depar t ment or r et ai n an i ndependent t est i ng agency on a cont i nui ng basi s.

1. 3. 2. 2 Qual i t y Cont r ol Pr ocedur es

Submi t qual i t y cont r ol pr ocedur es est abl i shed by t he pr ecast manuf act ur er i n accor dance wi t h NPCA QC Manual and ACPA QPC. Show t hat t he f ol l owi ng QC t est s ar e per f or med as r equi r ed and i n accor dance wi t h t he ASTM st andar ds i ndi cat ed.

1. 3. 2. 2. 1 Slump

Per f or m a sl ump t est f or each 150 cu yd of concr et e pr oduced, or once a

SECTI ON 03 42 13. 00 10 Page 6 day, whi chever comes f i r st . Per f or m sl ump t est s i n accor dance wi t h

ASTM C143/ C143M.

1. 3. 2. 2. 2 Temperature

Measur e t he t emper at ur e of f r esh concr et e when sl ump or ai r cont ent t est s ar e made and when compr essi ve t est speci mens ar e made i n accor dance wi t h

ASTM C1064/ C1064M.

1. 3. 2. 2. 3 Compr essi ve St r engt h

Make at l east f our compr essi ve st r engt h speci mens f or each 150 cubi c yar ds of concr et e of each mi x i n accor dance wi t h t he f ol l owi ng St andar ds:

ASTM C31/ C31M, ASTM C192/ C192M, ASTM C39/ C39M.

1. 3. 2. 2. 4 Ai r Cont ent

Per f or m t est s f or ai r cont ent on ai r - ent r ai ned, wet - cast concr et e f or each 150 cu yd of concr et e, but not l ess of t en t han once each day when ai r - ent r ai ned concr et e i s used. Det er mi ne t he ai r cont ent i n accor dance wi t h ei t her ASTM C231/ C231M or ASTM C173/ C173M f or nor mal wei ght aggr egat es and ASTM C173/ C173M f or l i ght wei ght aggr egat es.

1. 3. 2. 2. 5 Uni t Wei ght

Per f or m t est s f or uni t wei ght a mi ni mum of once per week t o ver i f y t he y i el d of bat ch mi xes. Per f or m uni t wei ght t est s f or each 100 cu yd of l i ght wei ght concr et e i n accor dance wi t h ASTM C138/ C138M.

1. 3. 2. 3 Inspection

The Cont r act i ng Of f i cer may pl ace an i nspect or i n t he pl ant when t he uni t s cover ed by t hi s speci f i cat i on ar e bei ng manuf act ur ed. The bur den of payment f or pl ant i nspect i on wi l l be c l ear l y det ai l ed i n t he speci f i cat i on. The pr ecast concr et e pr oducer must gi ve not i ce 14 days pr i or t o t he t i me t he uni t s wi l l be avai l abl e f or pl ant i nspect i on.

Nei t her t he exer ci se nor wai ver of i nspect i on at t he pl ant wi l l af f ect t he Gover nment ' s r i ght t o enf or ce cont r act ual pr ovi s i ons af t er uni t s ar e t r anspor t ed or er ect ed.

1. 3. 2. 4 Test Repor t s

Submi t t he f ol l owi ng:

1. 3. 2. 4. 1 Mat er i al Cer t i f i cat i ons or Labor at or y Test Repor t s

I ncl ude mi l l t est s and al l ot her t est dat a, f or por t l and cement , bl ended cement , pozzol ans, gr ound gr anul at ed bl ast f ur nace sl ag, s i l i ca f ume, aggr egat e, admi xt ur es, and cur i ng compound pr oposed f or use on t hi s project.

1. 3. 2. 4. 2 Mi x Test

Submi t r epor t s showi ng t hat t he mi x has been successf ul l y t est ed t o pr oduce concr et e wi t h t he pr oper t i es speci f i ed and wi l l be sui t abl e f or t he j ob condi t i ons. Such t est s may i ncl ude compr essi ve st r engt h, f l exur al st r engt h, pl ast i c or har dened ai r cont ent , f r eeze t haw dur abi l i t y , abr asi on and absor pt i on. Cl ear l y det ai l i n t he speci f i cat i ons speci al t est s f or pr ecast concr et e or cast - i n i t ems.

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1. 3. 2. 4. 3 Sel f - Consol i dat i ng Concr et e

Submi t suf f i c i ent document at i on, when t he use of sel f - consol i dat i ng concr et e ( SCC) i s pr oposed, showi ng a mi ni mum of 30- days pr oduct i on t r ack r ecor ds demonst r at i ng t hat SCC i s appr opr i at e f or cast i ng of t he pr oduct .

1. 3. 2. 4. 4 I n- Pl ant QA/ QC I nspect i on Repor t s

Submi t i nspect i on r epor t s upon t he r equest of t he Cont r act i ng Of f i cer .

1. 4 DELI VERY, STORAGE, AND HANDLI NG

1. 4. 1 Delivery

Del i ver pr ecast uni t s t o t he s i t e i n accor dance wi t h t he del i ver y schedul e t o avoi d excessi ve bui l d- up of uni t s i n st or age at t he s i t e. Upon del i ver y t o t he j obsi t e, al l pr ecast concr et e uni t s wi l l be i nspect ed by t he Cont r act i ng Of f i cer f or qual i t y and f i nal accept ance.

1. 4. 2 Storage

St or e uni t s of f t he gr ound or i n a manner t hat mi ni mi zes pot ent i al damage.

1. 4. 3 Handling

Handl e, t r anspor t , and st or e pr oduct s i n a manner t o mi ni mi ze damage.

Li f t i ng devi ces or hol es must be consi st ent wi t h i ndust r y st andar ds.

Per f or m l i f t i ng wi t h met hods or devi ces i nt ended f or t hi s pur pose as i ndi cat ed on shop dr awi ngs.

PART 2 PRODUCTS

2. 1 SYSTEM DESCRI PTI ON

Fur ni sh pr ecast concr et e uni t s desi gned and f abr i cat ed by an exper i enced and accept abl e pr ecast concr et e manuf act ur er who has been, f or at l east t hr ee year s, r egul ar l y and cont i nuousl y engaged i n t he manuf act ur e of pr ecast concr et e wor k s i mi l ar t o t hat i ndi cat ed on t he dr awi ngs.

Coor di nat e pr ecast wor k wi t h t he wor k of ot her t r ades. Bel ow gr ade st r uct ur es must compl y wi t h ASTM C858.

2. 1. 1 St andar d Pr ecast Uni t s

Desi gn st andar d pr ecast concr et e uni t s t o wi t hst and i ndi cat ed desi gn l oad condi t i ons i n accor dance wi t h appl i cabl e i ndust r y desi gn st andar ds.

Desi gn must al so consi der st r esses i nduced dur i ng handl i ng, shi ppi ng and i nst al l at i on as t o avoi d pr oduct cr acki ng or ot her handl i ng damage.

I ndi cat e desi gn l oads f or pr ecast concr et e uni t s on t he shop dr awi ngs.

Submi t dr awi ngs f or st andar d pr ecast concr et e uni t s f ur ni shed by t he pr ecast concr et e pr oducer f or appr oval by t he Cont r act i ng Of f i cer . These dr awi ngs must demonst r at e t hat t he appl i cabl e i ndust r y desi gn st andar ds have been met . I ncl ude i nst al l at i on and const r uct i on i nf or mat i on on shop dr awi ngs. I ncl ude det ai l s of st eel r ei nf or cement s i ze and pl acement as wel l as suppor t i ng desi gn cal cul at i ons, i f appr opr i at e. Pr oduce pr ecast concr et e uni t s i n accor dance wi t h t he appr oved dr awi ngs. Submi t cut sheet s, f or st andar d pr ecast concr et e uni t s, showi ng conf or mance t o pr oj ect dr awi ngs and r equi r ement s, and t o appl i cabl e i ndust r y desi gn st andar ds l i s t ed i n t hi s speci f i cat i on.

SECTI ON 03 42 13. 00 10 Page 8

2. 1. 2 Cust om- Made Pr ecast Uni t s

Submi t desi gn cal cul at i ons f or cust om- made pr ecast uni t s, pr epar ed and seal ed by a r egi st er ed pr of essi onal engi neer , f or appr oval pr i or t o f abr i cat i on. I ncl ude i n t he cal cul at i ons t he anal ysi s of uni t s f or l i f t i ng st r esses and t he si z i ng of l i f t i ng devi ces. Submi t dr awi ngs f ur ni shed by t he pr ecast concr et e pr oducer f or appr oval by t he Cont r act i ng Of f i cer . Show on t hese dr awi ngs compl et e desi gn, i nst al l at i on, and const r uct i on i nf or mat i on i n such det ai l as t o enabl e t he Cont r act i ng Of f i cer t o det er mi ne t he adequacy of t he pr oposed uni t s f or t he i nt ended pur pose. I ncl ude det ai l s of st eel r ei nf or cement s i ze and pl acement as wel l as suppor t i ng desi gn cal cul at i ons, i f appr opr i at e. Pr oduce pr ecast concr et e uni t s i n accor dance wi t h t he appr oved dr awi ngs.

2. 1. 3 Pr opr i et ar y Pr ecast Uni t s

Pr oduct s manuf act ur ed under f r anchi se ar r angement s must conf or m t o al l t he r equi r ement s speci f i ed by t he f r anchi ser . I t ems not i ncl uded i n t he f r anchi se speci f i cat i on, but i ncl uded i n t hi s speci f i cat i on, must conf or m t o t he r equi r ement s i n t hi s speci f i cat i on. Submi t st andar d pl ans or i nf or mat i ve l i t er at ur e, f or pr opr i et ar y pr ecast concr et e uni t s. Make avai l abl e suppor t i ng cal cul at i ons and desi gn det ai l s upon r equest .

Pr ovi de suf f i c i ent i nf or mat i on as t o demonst r at e t hat such pr oduct s wi l l per f or m t he i nt ended t ask.

2. 1. 4 Joi nt s and Seal ant s

Pr ovi de j oi nt s and seal ant s bet ween adj acent uni t s of t he t ype and conf i gur at i on i ndi cat ed on shop dr awi ngs meet i ng speci f i ed desi gn and per f or mance r equi r ement s.

2. 1. 5 Concr et e Mi x Desi gn

2. 1. 5. 1 Concr et e Mi x Pr opor t i ons

Base sel ect i on of pr opor t i ons f or concr et e on t he met hodol ogy pr esent ed i n ACI 211. 1 f or nor mal wei ght concr et e and ACI 211. 2 f or l i ght wei ght concr et e. Devel op t he concr et e pr opor t i ons usi ng t he same t ype and br and of cement , t he same t ype and br and of pozzol an, t he same t ype and gr adat i on of aggr egat es, and t he same t ype and br and of admi xt ur e t hat wi l l be used i n t he manuf act ur e of pr ecast concr et e uni t s f or t he pr oj ect . Do not use cal c i um chl or i de i n pr ecast concr et e cont ai ni ng r ei nf or ci ng st eel or ot her embedded met al i t ems. At a mi ni mum of t hi r t y days pr i or t o pr ecast concr et e uni t manuf act ur i ng, t he pr ecast concr et e pr oducer wi l l submi t a mi x desi gn and pr opor t i ons f or each st r engt h and t ype of concr et e t hat wi l l be used. Fur ni sh a compl et e l i s t of mat er i al s, i ncl udi ng quant i t y, t ype, br and and appl i cabl e dat a sheet s f or al l mi x desi gn const i t uent s as wel l as appl i cabl e r ef er ence speci f i cat i ons. The use of sel f - consol i dat i ng concr et e i s per mi t t ed, pr ovi ded t hat mi x desi gn pr opor t i ons and const i t uent s meet t he r equi r ement s of t hi s speci f i cat i on.

2. 1. 5. 2 Concr et e St r engt h

Pr ovi de pr ecast concr et e uni t s wi t h a 28- day compr essi ve st r engt h ( f ' c) of 4000 psi .

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2. 1. 5. 3 Wat er - t o- Cement Rat i o

Wher e not exposed t o f r eezi ng, but r equi r ed t o have a l ow per meabi l i t y , f ur ni sh concr et e wi t h a wat er - cement i t i ous r at i o of 0. 48 or l ess. Wher e exposed t o dei cer sal t s, br acki sh wat er , or seawat er , f ur ni sh concr et e wi t h a wat er - cement i t i ous r at i o of 0. 40 or l ess, f or cor r osi on pr ot ect i on.

2. 2 MATERIALS

Except as ot her wi se speci f i ed i n t he f ol l owi ng par agr aphs, conf or m mat er i al t o Sect i on 03 30 00. 00 10 CAST- I N- PLACE CONCRETE and Sect i on

03 20 00. 00 10 CONCRETE REI NFORCI NG.

2. 2. 1 Pigments

Non- f adi ng and l i me- r esi st ant

2. 2. 2 Reinforcement

2. 2. 2. 1 Rei nf or ci ng Bar s

a. Def or med Bi l l et - st eel : ASTM A615/ A615M

b. Def or med Low- al l oy st eel : ASTM A706/ A706M

2. 2. 2. 2 Rei nf or ci ng Wi r e

a. Pl ai n Wi r e: ASTM A1064/ A1064M

b. Def or med Wi r e: ASTM A1064/ A1064M

2. 2. 2. 3 Wel ded Wi r e Rei nf or cement

a. Pl ai n Wi r e: ASTM A1064/ A1064M

b. Def or med Wi r e: ASTM A1064/ A1064M

2. 2. 2. 4 Epoxy Coat ed Rei nf or cement

a. Rei nf or ci ng Bar s: ASTM A775/ A775M

b. Wi r es and Wel ded Wi r e: ASTM A884/ A884M

2. 2. 2. 5 Gal vani zed Rei nf or cement

Pr ovi de gal vani zed r ei nf or cement conf or mi ng t o ASTM A767/ A767M.

2. 2. 3 I nser t s and Embedded Met al

Al l i t ems embedded i n concr et e must be of t he t ype r equi r ed f or t he i nt ended t ask, and meet t he f ol l owi ng st andar ds.

a. St r uct ur al St eel Pl at es, Angl es, et c. : ASTM A36/ A36M

b. Hot - di pped Gal vani zed: ASTM A153/ A153M

c. Pr opr i et ar y I t ems: I n accor dance wi t h manuf act ur er s publ i shed literature

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2. 2. 4 Accessories

Submi t pr oper i nst al l at i on i nst r uct i ons and r el evant pr oduct dat a f or i t ems i ncl udi ng, but not l i mi t ed t o, seal ant s, gasket s, connect or s, st eps, cabl e r acks and ot her i t ems i nst al l ed bef or e or af t er del i ver y.

a. Rubber Gasket s f or Ci r cul ar Concr et e Sewer Pi pe and Cul ver t Pi pe:

ASTM C443.

b. Ext er nal Seal i ng Bands f or Nonci r cul ar Sewer , St or m Dr ai n and Cul ver t Pi pe: ASTM C877.

c. Pr ef or med Fl exi bl e Joi nt Seal ant s f or Concr et e Pi pe, Manhol es, and Manuf act ur ed Box Sect i ons: ASTM C990.

d. El ast omer i c Joi nt Seal ant s: ASTM C920

2. 2. 5 Pi pe Ent r y Connect or s

Pi pe ent r y connect or s must conf or m t o ASTM C923 or ASTM C1478.

2. 2. 6 Grout

Nonshr i nk Gr out must conf or m t o ASTM C1107/ C1107M. Cement i t i ous gr out must be a mi xt ur e of por t l and cement , sand, and wat er . Pr opor t i on one par t cement t o appr oxi mat el y 2. 5 par t s sand, wi t h t he amount of wat er based on pl acement met hod.

PART 3 EXECUTI ON

3. 1 FABRI CATI ON AND PLACEMENT

Per f or m f abr i cat i on i n accor dance wi t h NPCA QC Manual or ACPA QPC unl ess speci f i ed ot her wi se.

3. 1. 1 Forms

Use f or ms, f or manuf act ur i ng pr ecast concr et e pr oduct s, of t he t ype and desi gn consi st ent wi t h i ndust r y st andar ds and pr act i ces. They shoul d be capabl e of consi st ent l y pr ovi di ng uni f or m pr oduct s and di mensi ons.

Const r uct f or ms so t hat t he f or ces and vi br at i ons t o whi ch t he f or ms wi l l be subj ect ed can cause no pr oduct damage. Cl ean f or ms of concr et e bui l d- up af t er each use. Appl y f or m r el ease agent s accor di ng t o t he manuf act ur er s r ecommendat i ons and do not al l ow t o bui l d up on t he f or m cast i ng sur f aces.

3. 1. 2 Reinforcement

Fol l ow appl i cabl e ASTM St andar d or ACI 318 f or pl acement and spl i c i ng.

Fabr i cat e cages of r ei nf or cement ei t her by t y i ng t he bar s, wi r es or wel ded wi r e r ei nf or cement i nt o r i gi d assembl i es or by wel di ng, wher e per mi ssi bl e, i n accor dance wi t h AWS D1. 4/ D1. 4M. Posi t i on r ei nf or ci ng as speci f i ed by t he desi gn and so t hat t he concr et e cover conf or ms t o r equi r ement s. The t ol er ance on concr et e cover must be one- t hi r d of t hat speci f i ed but not mor e t han 1/ 2 i nch. Pr ovi de concr et e cover not l ess t han 1/ 2 i nch. Take posi t i ve means t o assur e t hat t he r ei nf or cement does not move si gni f i cant l y dur i ng t he cast i ng oper at i ons.

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3. 1. 3 Embedded I t ems

Posi t i on embedded i t ems at l ocat i ons speci f i ed i n t he desi gn document s.

Per f or m wel di ng i n accor dance wi t h AWS D1. 1/ D1. 1M when necessar y. Hol d r i gi dl y i n pl ace i nser t s, pl at es, wel dment s, l i f t i ng devi ces and ot her i t ems t o be i mbedded i n pr ecast concr et e pr oduct s so t hat t hey do not move si gni f i cant l y dur i ng cast i ng oper at i ons. Submi t pr oduct dat a sheet s and pr oper i nst al l at i on i nst r uct i on f or anchor s, l i f t i ng i nser t s and ot her devi ces. Cl ear l y i ndi cat e t he pr oduct s di mensi ons and saf e wor ki ng l oad.

3. 2 CONCRETE

3. 2. 1 Concr et e Mi xi ng

Mi xi ng oper at i ons must pr oduce bat ch- t o- bat ch uni f or mi t y of st r engt h, consi st ency, and appear ance.

3. 2. 2 Concr et e Pl aci ng

Deposi t concr et e i nt o f or ms as near t o i t s f i nal l ocat i on as pr act i cal .

Keep t he f r ee f al l of t he concr et e t o a mi ni mum. Consol i dat e concr et e i n such a manner t hat segr egat i on of t he concr et e i s mi ni mi zed and honeycombed ar eas ar e kept t o a mi ni mum. Use vi br at or s t o consol i dat e concr et e wi t h f r equenci es and ampl i t udes suf f i c i ent t o pr oduce wel l consol i dat ed concr et e.

3. 2. 2. 1 Hot Weat her Concr et i ng

Fol l ow r ecommendat i ons f or hot weat her concr et i ng i n ACI 305R. Dur i ng hot weat her , gi ve pr oper at t ent i on t o const i t uent s, pr oduct i on met hods, handl i ng, pl aci ng, pr ot ect i on, and cur i ng t o pr event excessi ve concr et e t emper at ur es or wat er evapor at i on t hat coul d i mpai r r equi r ed st r engt h or ser vi ceabi l i t y of t he member or st r uct ur e. The t emper at ur e of concr et e at t he t i me of pl aci ng must not exceed 90 degr ees F.

3. 2. 3 Concr et e Cur i ng

Commence cur i ng i mmedi at el y f ol l owi ng t he i ni t i al set and compl et i on of sur f ace f i ni shi ng.

3. 2. 3. 1 Cur i ng by Moi st ur e Ret ent i on

Pr event moi st ur e evapor at i on f r om exposed sur f aces unt i l adequat e st r engt h f or st r i ppi ng i s r eached by one of t he f ol l owi ng met hods:

a. Cover wi t h pol yet hyl ene sheet s a mi ni mum of 6 mi l s t hi ck i n accor dance with ASTM C171.

b. Cover wi t h bur l ap or ot her absor pt i ve mat er i al and keep cont i nual l y moist.

c. Use a membr ane- cur i ng compound, conf or mi ng t o ASTM C309 and appl i ed at a r at e not l ess t han 200 squar e f t / gal l on, or i n accor dance wi t h manuf act ur er s ' r ecommendat i ons.

3. 2. 3. 2 Cur i ng wi t h Heat and Moi st ur e

Do not subj ect concr et e t o st eam or hot ai r unt i l af t er t he concr et e has at t ai ned i t s i ni t i al set . Appl y st eam, i f used, wi t hi n a sui t abl e

SECTI ON 03 42 13. 00 10 Page 12 encl osur e, whi ch per mi t s f r ee c i r cul at i on of t he st eam i n accor dance wi t h CSA A23. 4. I f hot ai r i s used f or cur i ng, t ake pr ecaut i ons t o pr event moi st ur e l oss f r om t he concr et e. The t emper at ur e of t he concr et e must not be per mi t t ed t o exceed 150 degr ees F. These r equi r ement s do not appl y t o pr oduct s cur ed wi t h st eam under pr essur e i n an aut ocl ave.

3. 2. 4 Sur f ace Fi ni sh

Fi ni sh unf or med sur f aces of wet - cast pr ecast concr et e pr oduct s as speci f i ed. I f no f i ni shi ng pr ocedur e i s speci f i ed, f i ni sh such sur f aces usi ng a st r i ke- of f t o l evel t he concr et e wi t h t he t op of t he f or m.

3. 2. 4. 1 For med Non- Ar chi t ect ur al Sur f aces

Cast sur f aces agai nst appr oved f or ms f ol l owi ng i ndust r y pr act i ces i n c l eani ng f or ms, desi gni ng concr et e mi xes, pl aci ng and cur i ng concr et e.

Nor mal col or var i at i ons, f or m j oi nt mar ks, smal l sur f ace hol es caused by ai r bubbl es, and mi nor chi ps and spal l s wi l l be accept ed but no maj or i mper f ect i ons, honeycombs or ot her maj or def ect s wi l l be per mi t t ed.

3. 2. 4. 2 Unf or med Sur f aces

Fi ni sh unf or med sur f aces wi t h a v i br at i ng scr eed, or by hand wi t h a f l oat .