Technical_Specifications,_(Revised_Section)_03_31_01.00_10.pdf

Char l er oi Locks and Dam St i l l i ng Basi n & Abut ment Pr ot ect i on Wal l

SECTI ON TABLE OF CONTENTS

DI VI SI ON 03 - CONCRETE

SECTI ON 03 31 01. 00 10

CAST- I N- PLACE STRUCTURAL CONCRETE FOR CI VI L WORKS

PART 1 GENERAL

1. 1 SUMMARY

1. 2 REFERENCES

1. 3 DESI GN REQUI REMENTS

1. 3. 1 Concr et e Mi x Desi gns

1. 3. 2 Ai r Cont ent

1. 3. 3 Sl ump

1. 3. 3. 1 Under wat er Concr et e

1. 3. 4 Concr et e St r engt h

1. 3. 5 Maxi mum Wat er - Cement i t i ous Mat er i al ( W/ C) Rat i o

1. 3. 6 Ti me of Set

1. 3. 7 Washout

1. 3. 8 Const r uct i on Tol er ances

1. 3. 8. 1 Appear ance

1. 4 MODI FI CATI ON TO REFERENCE

1. 5 SUBMI TTALS

1. 6 QUALI TY ASSURANCE

1. 6. 1 Cer t i f i cat es: Recor d Requi r ement

1. 7 DELI VERY, STORAGE, AND HANDLI NG

1. 8 CONCRETE WORK PLANS

1. 8. 1 Under wat er Concr et e

PART 2 PRODUCTS

2. 1 MATERI ALS

2. 1. 1 Cement i t i ous Mat er i al s

2. 1. 1. 1 Por t l and Cement

2. 1. 1. 2 Fl y Ash

2. 1. 1. 3 Gr ound Gr anul at ed Bl ast - Fur nace Sl ag

2. 1. 1. 4 Si l i ca Fume

2. 1. 2 Aggr egat es

2. 1. 2. 1 Aggr egat e Expansi on

2. 1. 2. 2 Unf avor abl e Pr oper t i es

2. 1. 3 Chemi cal Admi xt ur es

2. 1. 3. 1 Ai r - Ent r ai ni ng Admi xt ur e

2. 1. 3. 2 Accel er at i ng Admi xt ur e

2. 1. 3. 3 Wat er - Reduci ng or Ret ar di ng Admi xt ur e

2. 1. 3. 3. 1 Wat er - Reduci ng or Ret ar di ng Admi xt ur es

2. 1. 3. 3. 2 Hi gh- Range Wat er Reduci ng Admi xt ur e

2. 1. 3. 4 Vi scosi t y Modi f y i ng or Ant i - Washout Admi xt ur e

2. 1. 4 Wat er

2. 1. 5 St r uct ur al St eel

2. 1. 6 Nonshr i nk Gr out

2. 1. 7 Bond Br eaker

2. 2 EQUI PMENT

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2. 2. 1 Conveyi ng Equi pment

2. 2. 1. 1 Bucket s

2. 2. 1. 2 Tr ansf er Hopper s

2. 2. 1. 3 Tr ucks

2. 2. 1. 4 Chut es

2. 2. 1. 5 Bel t Conveyor s

2. 2. 1. 6 Concr et e Pumps

2. 2. 2 Vi br at or s

2. 2. 3 Wor k Pl at f or ms

2. 2. 4 Tr emi e Equi pment

PART 3 EXECUTI ON

3. 1 PREPARATI ON FOR PLACI NG

3. 1. 1 Embedded I t ems

3. 1. 2 Concr et e on Ear t h Foundat i ons

3. 2 CONVEYI NG AND PLACI NG CONCRETE

3. 2. 1 Gener al

3. 2. 2 Ti me I nt er val Bet ween Mi xi ng and Pl aci ng

3. 2. 3 Ambi ent Condi t i ons

3. 2. 4 Pr ot ect i on of Concr et e

3. 2. 5 Col d- Weat her Requi r ement s

3. 2. 6 Hot - Weat her Requi r ement s

3. 2. 7 Under wat er Concr et e Pl acement

3. 2. 7. 1 Gener al

3. 2. 7. 2 Pl acement of Concr et e

3. 2. 8 I nt er r upt ed Concr et e Pl acement

3. 3 CONSOLI DATI ON OF CONCRETE

3. 4 FI NI SHI NG

3. 5 TESTS AND I NSPECTI ONS

3. 5. 1 Gener al

3. 5. 2 Test i ng and I nspect i on Requi r ement s

3. 5. 2. 1 Concr et e Mi xt ur e

3. 5. 2. 1. 1 Sl ump and Sl ump Fl ow Test i ng

3. 5. 2. 1. 2 Temper at ur e

3. 5. 2. 1. 3 Compr essi ve- St r engt h Speci mens

3. 5. 2. 1. 4 Ther mal I nt egr i t y Pr of i l i ng

3. 5. 2. 1. 4. 1 Shaf t Pr epar at i on

3. 5. 2. 1. 4. 2 TI P I nst al l at i on and Recor di ng

3. 5. 2. 1. 4. 3 TI P Per sonnel and Repor t i ng Requi r ement s

3. 5. 2. 1. 5 St r engt h Det er mi nat i on Usi ng Mat ur i t y Met hod

3. 5. 2. 2 I nspect i on Bef or e Pl aci ng

3. 5. 2. 3 Pl aci ng

3. 5. 2. 3. 1 Pl aci ng I nspect i on

3. 5. 2. 4 Vi br at or s

3. 5. 2. 4. 1 Vi br at or Test i ng and Use

3. 5. 2. 4. 2 Vi br at or Cor r ect i ve Act i on

3. 5. 3 Repor t s

3. 6 CONSTRUCTI ON RECORDS

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

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SECTI ON 03 31 01. 00 10

CAST- I N- PLACE STRUCTURAL CONCRETE FOR CI VI L WORKS

PART 1 GENERAL

1. 1 SUMMARY

Thi s sect i on speci f i es t he r equi r ement s f or al l st r uct ur al concr et e and concr et e f or cast - i n- pl ace concr et e pi l es t o be pl aced under t hi s cont r act . St r uct ur al concr et e shal l i ncl ude, but not be l i mi t ed t o, t he gr out bag t i e- i n el ement , abut ment pr ot ect i on wal l pi l e f i l l . Gr out f or t he gr out bag scour pr ot ect i on i s speci f i ed i n Sect i on 35 43 29 GROUT BAG

SCOUR PROTECTI ON.

1. 2 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 117 ( 2010; Er r at a 2011) Speci f i cat i ons f or Tol er ances f or Concr et e Const r uct i on and Mat er i al s and Comment ar y

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

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

ACI 306R ( 2016) Gui de t o Col d Weat her Concr et i ng

ACI SP- 15 ( 2011) Fi el d Ref er ence Manual : St andar d Speci f i cat i ons f or St r uct ur al Concr et e ACI 301- 05 wi t h Sel ect ed ACI Ref er ences

ASTM I NTERNATI ONAL ( ASTM)

ASTM A992/ A992M ( 2011) St andar d Speci f i cat i on f or St r uct ur al St eel Shapes

ASTM C1240 ( 2014) St andar d Speci f i cat i on f or Si l i ca Fume Used i n Cement i t i ous Mi xt ur es

ASTM C1064/ C1064M ( 2017) 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 C1074 ( 2011) St andar d Pr act i ce f or Est i mat i ng Concr et e St r engt h by t he Mat ur i t y Met hod

ASTM C1107/ C1107M ( 2017) St andar d Speci f i cat i on f or Packaged Dr y, Hydr aul i c- Cement Gr out ( Nonshr i nk)

SECTI ON 03 31 01. 00 10 Page 3

ASTM C1240 ( 2014) St andar d Speci f i cat i on f or Si l i ca Fume Used i n Cement i t i ous Mi xt ur es

ASTM C1260 ( 2014) St andar d Test Met hod f or Pot ent i al Al kal i React i v i t y of Aggr egat es ( Mor t ar - Bar Met hod)

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

ASTM C150/ C150M ( 2017) St andar d Speci f i cat i on f or Por t l and Cement

ASTM C1567 ( 2013) St andar d Test Met hod f or Pot ent i al Al kal i - Si l i ca React i v i t y of Combi nat i ons of Cement i t i ous Mat er i al s and Aggr egat e ( Accel er at ed Mor t ar - Bar Met hod)

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

ASTM C1611/ C1611M ( 2014) St andar d Test Met hod f or Sl ump Fl ow of Sel f - Consol i dat i ng Concr et e

ASTM C172/ C172M ( 2017) St andar d Pr act i ce f or Sampl i ng Fr eshl y Mi xed Concr et e

ASTM C231/ C231M ( 2017a) 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

ASTM C260/ C260M ( 2010a; R 2016) St andar d Speci f i cat i on f or Ai r - Ent r ai ni ng Admi xt ur es f or Concr et e

ASTM C295/ C295M ( 2012) Pet r ogr aphi c Exami nat i on of Aggr egat es f or Concr et e

ASTM C31/ C31M ( 2018) 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 C33/ C33M ( 2016) St andar d Speci f i cat i on f or Concr et e Aggregates

ASTM C39/ C39M ( 2018) 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 C494/ C494M ( 2017) St andar d Speci f i cat i on f or Chemi cal Admi xt ur es f or Concr et e

ASTM C618 ( 2017a) St andar d Speci f i cat i on f or Coal Fl y Ash and Raw or Cal c i ned Nat ur al Pozzol an f or Use i n Concr et e

ASTM C94/ C94M ( 2017a) St andar d Speci f i cat i on f or Ready- Mi xed Concr et e

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ASTM C989/ C989M ( 2017) St andar d Speci f i cat i on f or Sl ag Cement f or Use i n Concr et e and Mor t ar s

ASTM D75/ D75M ( 2014) St andar d Pr act i ce f or Sampl i ng Aggregates

ASTM D7949 ( 2014) St andar d Test Met hods f or Ther mal I nt egr i t y Pr of i l i ng of Concr et e Deep Foundations

CONCRETE REI NFORCI NG STEEL I NSTI TUTE ( CRSI )

CRSI 10MSP ( 2009; 28t h Ed; Er r at a) Manual of St andar d Practice

NATI ONAL READY MI XED CONCRETE ASSOCI ATI ON ( NRMCA)

NRMCA CPMB 100 ( 2000; R 2006) Concr et e Pl ant St andar ds

U. S. ARMY CORPS OF ENGI NEERS ( USACE)

COE CRD- C 521 ( 1981) St andar d Test Met hod f or Fr equency and Ampl i t ude of Vi br at or s f or Concr et e

COE CRD- C 61 ( 1989A) Test Met hod f or Det er mi ni ng t he Resi st ance of Fr eshl y Mi xed Concr et e t o Washi ng Out i n Wat er

COE CRD- C 661 ( 2006) Speci f i cat i on f or Ant i washout Admi xt ur es f or Concr et e

1. 3 DESI GN REQUI REMENTS

Desi gn i n accor dance wi t h ACI 301, Sect i on 4. Submi t concr et e mi x desi gns wi t h t he f ol l owi ng pr oper t i es.

1. 3. 1 Concr et e Mi x Desi gns

A mi ni mum of 30 cal endar days pr i or t o concr et e pl acement , submi t a mi x desi gn f or each st r engt h and t ype of concr et e. Submi t a compl et e l i s t of mat er i al s i ncl udi ng t ype, br and, sour ce, and amount of cement , f l y ash, pozzol ans, gr ound sl ag, and admi xt ur es, and appl i cabl e r ef er ence speci f i cat i ons. Pr ovi de mi x pr opor t i on dat a usi ng at l east t hr ee di f f er ent wat er - cement r at i os f or each cl ass and t ype of concr et e r equi r ed. I f sour ce mat er i al changes, r esubmi t mi x pr opor t i on dat a usi ng r evi sed sour ce mat er i al . No mat er i al shal l be pr ovi ded unl ess pr oven by t r i al mi x st udi es t o meet t he r equi r ement s of t hi s speci f i cat i on, unl ess ot her wi se appr oved i n wr i t i ng by t he Cont r act i ng Of f i cer . The submi t t al must c l ear l y i ndi cat e wher e each mi x desi gn wi l l be used when mor e t han one mi x desi gn i s submi t t ed. Submi t addi t i onal dat a r egar di ng concr et e aggr egat es i f t he sour ce of aggr egat es changes.

1. 3. 2 Ai r Cont ent

Ai r cont ent bet ween 4 and 7 per cent as del i ver ed t o t he f or ms and as det er mi ned by ASTM C231/ C231M, except t hat when t he nomi nal maxi mum- si ze coar se aggr egat e i s 3/ 4 i nch, bet ween 4. 5 and 7. 5 per cent . Ai r cont ent i s not r equi r ed f or t r emi e concr et e.

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1. 3. 3 Slump

1. 3. 3. 1 Under wat er Concr et e

Sl ump of t he concr et e, as del i ver ed t o t he poi nt of pl acement , must be wi t hi n t he l i mi t s f or a r equi r ed sl ump of 9 i nches ( ++/- 1- i nch) , wi t h a mi ni mum sl ump of 7- 1/ 2 i nches at 90 mi nut es. Sl ump must be det er mi ned i n accor dance wi t h ASTM C143/ C143M. Adequat e s l ump f l ow must be mai nt ai ned over t i me t o accommodat e mi xi ng, t r anspor t , pl acement , and consol i dat i on of t he f ul l l i f t of concr et e.

Sl ump f l ow of f l owabl e concr et e mi xt ur es, as del i ver ed t o t he poi nt of pl acement , must be wi t hi n t he l i mi t s f or a r equi r ed sl ump f l ow of 20 i nches ( + 3 i nches) . Sl ump f l ow must be det er mi ned i n accor dance wi t h ASTM C1611/ C1611M. Adequat e s l ump must be mai nt ai ned over t i me t o accommodat e mi xi ng, t r anspor t , pl acement , and consol i dat i on of t he f ul l l i f t of concr et e.

1. 3. 4 Concr et e St r engt h

Pr ovi de speci f i ed compr essi ve st r engt h f ' c as f ol l ows:

COMPRESSI VE STRENGTH ( PSI ) STRUCTURE OR PORTI ON OF STRUCTURE

5, 000 @ 28 days St r uct ur al concr et e, abut ment pr ot ect i on wal l pi l es

1. 3. 5 Maxi mum Wat er - Cement i t i ous Mat er i al ( W/ C) Rat i o

Maxi mum W/ C al l owed as f ol l ows:

WATER- CEMENT RATI O,

BY MASS

STRUCTURE OR PORTI ON OF STRUCTURE

0.45 St r uct ur al concr et e, abut ment pr ot ect i on wal l pi l es and abut ment pr ot ect i on sl ab

These W/ C' s may cause hi gher st r engt hs t han t hat r equi r ed by par agr aph

CONCRETE STRENGTH.

1. 3. 6 Ti me of Set

I ni t i al t i me of set f or cast - i n- pl ace concr et e pi l e f i l l and i nf i l l concr et e must be r est r i ct ed t o a r ange of 6 hour s t o 24 hour s. Fi nal set must be achi eved i n l ess t han 30 hour s. I n addi t i on, t he t i me of set must be appr opr i at e t o accommodat e mi xi ng, t r anspor t , pl acement , and consol i dat i on of t he f ul l l i f t of concr et e.

1. 3. 7 Washout

Washout f or cast - i n- pl ace concr et e pi l e f i l l and i nf i l l concr et e must be

SECTI ON 03 31 01. 00 10 Page 6 no gr eat er t han 8 per cent and shal l be det er mi ned i n accor dance wi t h

COE CRD- C 61.

1. 3. 8 Const r uct i on Tol er ances

Except as speci f i ed ot her wi se, a pl us t ol er ance i ncr eases and a mi nus t ol er ance decr eases t he di mensi on t o whi ch i t appl i es. A t ol er ance wi t hout s i gn means pl us or mi nus. Wher e onl y one si gn i s speci f i ed, t her e i s no l i mi t i n t he ot her di r ect i on. Tol er ances ar e not cumul at i ve. The most r est r i ct i ve t ol er ance wi l l cont r ol . Tol er ances can not ext end t he st r uct ur e beyond l egal boundar i es.

a. Make l evel and gr ade t ol er ance measur ement s of s l abs as soon as possi bl e af t er f i ni shi ng. When f or ms or shor i ng ar e used, make t he measur ement s pr i or t o r emoval .

b. Const r uct i on t ol er ances must meet t he r equi r ement s of ACI 117 and any of t he f ol l owi ng r equi r ement s t hat ar e appl i cabl e.

1. 3. 8. 1 Appearance

Cl ean per manent l y exposed sur f aces, i f st ai ned or ot her wi se di scol or ed, by a met hod t hat does not har m t he concr et e and t hat i s appr oved by t he Cont r act i ng Of f i cer .

1. 4 MODI FI CATI ON TO REFERENCE

I n t he ACI publ i cat i ons, t he advi sor y pr ovi s i ons shal l be consi der ed t o be mandat or y, as t hough t he wor d " shal l " has been subst i t ut ed f or " shoul d" wher ever i t appear s; r ef er ence t o t he " Bui l di ng Of f i c i al " , t he " St r uct ur al Engi neer " , and t he " Ar chi t ect / Engi neer " shal l be i nt er pr et ed t o mean t he Cont r act i ng Of f i cer .

1. 5 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. When used, a desi gnat i on f ol l owi ng t he " G" desi gnat i on i dent i f i es t he of f i ce t hat wi l l r evi ew t he submi t t al f or t he Gover nment . 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- 01 Pr econst r uct i on Submi t t al s

Concr et e Wor k Pl ans; G, DO Wor k Pl at f or ms; G, DO

SD- 02 Shop Dr awi ngs

Rei nf or ci ng st eel ; G, DO

SD- 03 Pr oduct Dat a

Concr et e Mi x Desi gns; G, DO Conveyi ng Equi pment Pl aci ng Equi pment Col d- Weat her Requi r ement s; G, DO Hot - Weat her Requi r ement s; G, DO St r uct ur al St eel Nonshr i nk Gr out

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Mechani cal Rei nf or ci ng Bar Connect or s; G, DO

SD- 06 Test Repor t s

Aggr egat es; G, DO Mi l l Test Repor t s Test s and I nspect i ons Qual i t y of Aggr egat es; G, DO Water

SD- 07 Cer t i f i cat es

Concr et e Fi el d Test i ng Techni c i ans Concr et e Const r uct i on I nspect or ( CCI ) Cement i t i ous Mat er i al s Bat ch Ti cket

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

Cur i ng Compound

SD- 11 Cl oseout Submi t t al s

Const r uct i on Recor ds

1. 6 QUALI TY ASSURANCE

The Gover nment wi l l sampl e and t est aggr egat es and concr et e t o det er mi ne compl i ance wi t h t he speci f i cat i ons. Pr ovi de f aci l i t i es and l abor as may be necessar y f or pr ocur ement of r epr esent at i ve t est sampl es. Sampl es of aggr egat es wi l l be obt ai ned at t he poi nt of bat chi ng i n accor dance wi t h ASTM D75/ D75M. Concr et e wi l l be sampl ed i n accor dance wi t h ASTM C172/ C172M.

Do not use a mat er i al unt i l t he Cont r act i ng Of f i cer gi ves not i ce t hat t est r esul t s ar e sat i sf act or y. The Gover nment wi l l sampl e and t est chemi cal admi xt ur es, cur i ng compounds, and cement i t i ous mat er i al s. The i ndi v i dual s who sampl e and t est concr et e or t he const i t uent s of concr et e as r equi r ed i n t hi s speci f i cat i on must have demonst r at ed a knowl edge and abi l i t y t o per f or m t he necessar y t est pr ocedur es equi val ent t o t he ACI mi ni mum gui del i nes f or cer t i f i cat i on of Concr et e Fi el d Test i ng Techni c i ans, Gr ade I . The i ndi v i dual s who per f or m t he i nspect i on of concr et e const r uct i on must have demonst r at ed a knowl edge and abi l i t y equi val ent t o t he ACI mi ni mum gui del i nes f or cer t i f i cat i on of Concr et e Const r uct i on I nspect or ( CCI ) . Submi t st at ement s t hat t he concr et e t est i ng t echni c i ans and t he concr et e i nspect or s meet t he speci f i ed r equi r ement s. Mai nt ai n a copy of ACI SP- 15 and CRSI 10MSP at pr oj ect s i t e.

1. 6. 1 Cer t i f i cat es: Recor d Requi r ement

ASTM C94/ C94M. Submi t mandat or y bat ch t i cket i nf or mat i on f or each l oad of r eady- mi xed concr et e.

1. 7 DELI VERY, STORAGE, AND HANDLI NG

Ret est chemi cal admi xt ur es t hat have been i n st or age at t he pr oj ect s i t e f or l onger t han 6 mont hs or t hat have been subj ect ed t o f r eezi ng and r ej ect i f t est r esul t s ar e not sat i sf act or y. Chemi cal admi xt ur es wi l l be accept ed based on compl i ance wi t h t he r equi r ement s of par agr aph CHEMI CAL

ADMIXTURES.

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1. 8 CONCRETE WORK PLANS

Submi t compr ehensi ve wor k pl ans t o t he Cont r act i ng Of f i cer f or comment and appr oval at l east 90 cal endar days pr i or t o t he st ar t of pr oduct i on of any concr et e. Or gani ze t he pl an t o show and descr i be t he equi pment and met hods pr oposed f or t he t ype of concr et e t o be pl aced ( i . e. , st r uct ur al concr et e, r epai r concr et e, under wat er concr et e, et c. ) . The Gover nment wi l l r equi r e 45 cal endar days f or r evi ew of t he pl ans.

1. 8. 1 Under wat er Concr et e

The cover age f or under wat er concr et e must i ncl ude, but not be l i mi t ed t o, t he f ol l owi ng:

1. Bat chi ng, i ncl udi ng t he t i mi ng of t he i nt r oduct i on of t he constituents.

2. I nst al l at i on of anchor r ei nf or ci ng.

3. I nst al l at i on of f or mwor k, i f r equi r ed

4. Tr uck Mi xi ng, i ncl udi ng speed and dur at i on.

5. Tr anspor t at i on and conveyance f r om t he t r uck mi xer t o t he poi nt of placement.

6. Sampl i ng and Test i ng.

7. Di v i ng Ser vi ces.

8. Pl acement equi pment , i ncl udi ng r equi r ed wor k pl at f or ms.

9. Pr ocedur es f or under wat er pl acement .

10. Pr ocedur es f or i nt er r upt ed concr et e pl acement s.

11. Cont i ngency pl ans t o addr ess pot ent i al i nt er r upt i ons wi t h pr oposed actions:

a. Pot ent i al br eakdown of t r emi e or pumpi ng equi pment .

b. Pot ent i al pl uggi ng of t he t r emi e pi pe or pump l i ne.

c. Pot ent i al br eakdown of concr et e conveyi ng syst ems.

The t i mi ng and sequence of t he var i ous st eps f or each t ype of concr et e must al so be descr i bed. The pl an must be of suf f i c i ent det ai l t o demonst r at e t hat equi pment and met hods ar e appr opr i at e f or t he speci f i c t ype of concr et e, and t hat t he wor k conf or ms t o t he r equi r ement s of Di v i s i on 3 - CONCRETE. The pl an must be subj ect t o r evi ew and comment by t he Cont r act i ng Of f i cer . Once appr oved, t he Cont r act or must f ol l ow al l pr ocedur es set f or t h i n t he pl an. Any r evi s i ons t o t he pl an shal l be submi t t ed t o t he Cont r act i ng Of f i cer f or appr oval .

PART 2 PRODUCTS

2. 1 MATERIALS

Mi x desi gn and mat er i al sel ect i on ar e t he r esponsi bi l i t y of t he Cont r act or . I t i s not r equi r ed t hat t he concr et e mi xes cont ai n al l t he mat er i al s l i s t ed i n t he f ol l owi ng par agr aphs. I f a mat er i al i s used i n t he mi x, submi t mi l l t est r epor t s at t est i ng t hat mat er i al s meet t he r equi r ement s of t he speci f i cat i on under whi ch t hey ar e f ur ni shed.

Cer t i f i cat i on and mi l l t est r epor t s must be f r om sampl es t aken f r om t he par t i cul ar l ot f ur ni shed.

2. 1. 1 Cement i t i ous Mat er i al s

Cement i t i ous mat er i al s ar e por t l and cement , por t l and- pozzol an cement , por t l and bl ast - f ur nace sl ag cement , por t l and cement i n combi nat i on wi t h pozzol an or GGBF sl ag conf or mi ng t o appr opr i at e speci f i cat i ons l i s t ed

SECTI ON 03 31 01. 00 10 Page 9 below.

2. 1. 1. 1 Por t l and Cement

ASTM C150/ C150M, Type I I , l ow al kal i when used wi t h aggr egat es l i s t ed at t he end of t hi s sect i on whi ch r equi r e i t .

2. 1. 1. 2 Fl y Ash

ASTM C618, Cl ass F, wi t h t he opt i onal r equi r ement s f or mul t i pl e f act or , dr y i ng shr i nkage, and uni f or mi t y of Tabl e 2. Tabl e 3 r equi r ement s f or maxi mum al kal i s shal l appl y when used wi t h aggr egat es l i s t ed at t he end of t hi s sect i on t o r equi r e l ow- al kal i cement .

2. 1. 1. 3 Gr ound Gr anul at ed Bl ast - Fur nace Sl ag

Conf or m t o ASTM C989/ C989M, Gr ade 100 or 200.

2. 1. 1. 4 Si l i ca Fume

Conf or m t o ASTM C1240.

2. 1. 2 Aggregates

ASTM C33/ C33M, except as modi f i ed her ei n. Pr ovi de aggr egat es t hat do not cont ai n any subst ance whi ch may be del et er i ousl y r eact i ve wi t h t he al kal i es i n t he cement . Submi t t est r epor t showi ng compl i ance wi t h

ASTM C33/ C33M.

2. 1. 2. 1 Aggr egat e Expansi on

Pr ovi de f i ne and coar se aggr egat es wi t h expansi ons l ess t han 0. 08 per cent at 28 days af t er cast i ng when t est i ng i n accor dance wi t h ASTM C1260.

Shoul d t he t est dat a i ndi cat e an expansi on of 0. 08 per cent or gr eat er , r ej ect t he aggr egat e( s) or per f or m addi t i onal t est i ng usi ng ASTM C1567 and usi ng t he pr oposed mi x desi gn. I n t hi s case, i ncl ude t he mi x desi gn l ow al kal i por t l and cement and one of t he f ol l owi ng suppl ement ar y cement i t i ous materials:

a. GGBF sl ag at a mi ni mum of 40 per cent of t ot al cement i t i ous

b. Fl y ash or nat ur al pozzol an at a mi ni mum of t ot al cement i t i ous of

( 1) 30 per cent i f ( Si O2 pl us Al 2O3 pl us Fe2O3) i s 65 per cent or mor e, ( 2) 25 per cent i f ( Si O2 pl us Al 2O3 pl us Fe2O3) i s 70 per cent or mor e, ( 3) 20 per cent i f ( Si O2 pl us Al 2O3 pl us Fe2O3) i s 80 per cent or mor e, ( 4) 15 per cent i f ( Si O2 pl us Al 2O3 pl us Fe2O3) i s 90 per cent or mor e.

I f a combi nat i on of t hese mat er i al s i s chosen, t he mi ni mum amount must be a l i near combi nat i on of t he mi ni mum amount s above. I ncl ude t hese mat er i al s i n suf f i c i ent pr opor t i on t o show l ess t han 0. 08 per cent expansi on at 28 days af t er cast i ng when t est ed i n accor dance wi t h

ASTM C1567.

2. 1. 2. 2 Unf avor abl e Pr oper t i es

Do not pr ovi de aggr egat es possessi ng pr oper t i es or const i t uent s t hat ar e known t o have speci f i c unf avor abl e ef f ect s i n concr et e when t est ed i n accor dance wi t h ASTM C295/ C295M.

SECTI ON 03 31 01. 00 10 Page 10

2. 1. 3 Chemi cal Admi xt ur es

Pr ovi de chemi cal admi xt ur es, when r equi r ed or per mi t t ed, t hat conf or m t o t he appr opr i at e speci f i cat i on l i s t ed.

2. 1. 3. 1 Ai r - Ent r ai ni ng Admi xt ur e

Conf or m t o ASTM C260/ C260M and consi st ent l y cause t he concr et e t o have an ai r cont ent i n t he speci f i ed r anges under f i el d condi t i ons.

2. 1. 3. 2 Accel er at i ng Admi xt ur e

Meet t he r equi r ement s of ASTM C494/ C494M, Type C or E, except t hat cal c i um chl or i de or admi xt ur es cont ai ni ng cal c i um chl or i de i s not per mi t t ed.

2. 1. 3. 3 Wat er - Reduci ng or Ret ar di ng Admi xt ur e

2. 1. 3. 3. 1 Wat er - Reduci ng or Ret ar di ng Admi xt ur es

ASTM C494/ C494M, Type A, B, or D, except t hat t he 6- mont h and 1- year compr essi ve st r engt h t est s ar e wai ved.

2. 1. 3. 3. 2 Hi gh- Range Wat er Reduci ng Admi xt ur e

ASTM C494/ C494M, Type F or G except t hat t he 6- mont h and 1- year st r engt h r equi r ement s ar e wai ved. The admi xt ur e may be used onl y when appr oved by t he Cont r act i ng Of f i cer , such appr oval bei ng cont i ngent upon par t i cul ar mi xt ur e cont r ol as descr i bed i n t he Cont r act or ' s Qual i t y Cont r ol Pl an.

2. 1. 3. 4 Vi scosi t y Modi f y i ng or Ant i - Washout Admi xt ur e

Conf or m t o ASTM C494/ C494MA, Type S. Ant i washout admi xt ur e shal l al so conf or m t o COE CRD- C 661.

2. 1. 4 Water

Pr ovi de wat er f or mi xi ng and cur i ng compl i ance wi t h t he r equi r ement s of ASTM C1602/ C1602M; 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 . Submi t t est r epor t showi ng wat er compl i es wi t h

ASTM C1602/ C1602M.

2. 1. 5 St r uct ur al St eel

ASTM A992/ A992M.

2. 1. 6 Nonshr i nk Gr out

Conf or m t o ASTM C1107/ C1107M and a commer ci al f or mul at i on sui t abl e f or t he appl i cat i on pr oposed.

2. 1. 7 Bond Br eaker

Bond br eaker f or t he scour pr ot ect i on t i e- i n el ement shal l be pl ast i c sheet hel d i n pl ace wi t h wat er pr oof t ape, under wat er appl i ed f l exi bl e coat i ng or ot her met hod appr oved by t he Cont r act i ng Of f i cer .

SECTI ON 03 31 01. 00 10 Page 11

2. 2 EQUIPMENT

Submi t dat a on pl aci ng equi pment and met hods. Conf or m t he bat ch pl ant t o t he r equi r ement s of NRMCA CPMB 100 and as speci f i ed; however , r at i ng pl at es at t ached t o bat ch pl ant equi pment ar e not r equi r ed. Submi t bat ch pl ant dat a f or conf or mance wi t h appl i cabl e speci f i cat i ons.

2. 2. 1 Conveyi ng Equi pment

Submi t dat a on t he conveyi ng equi pment and met hods f or t r anspor t i ng, handl i ng, and deposi t i ng t he concr et e. Conf or m t he conveyi ng equi pment t o t he f ol l owi ng r equi r ement s:

2. 2. 1. 1 Buckets

The i nt er i or hopper s l ope must be not l ess t han 58 degr ees f r om t he hor i zont al , t he mi ni mum di mensi on of t he c l ear gat e openi ng must be at l east f i ve t i mes t he nomi nal maxi mum- si ze aggr egat e, and t he ar ea of t he gat e openi ng must not be l ess t han 2 squar e f eet . The maxi mum di mensi on of t he gat e openi ng must not be gr eat er t han t wi ce t he mi ni mum di mensi on.

The bucket gat es must be essent i al l y gr out t i ght when cl osed and may be manual l y, pneumat i cal l y, or hydr aul i cal l y oper at ed except t hat bucket s l ar ger t han 2 cubi c yar ds must not be manual l y oper at ed. The desi gn of t he bucket must pr ovi de means f or posi t i ve r egul at i on of t he amount and r at e of deposi t of concr et e i n each dumpi ng posi t i on.

2. 2. 1. 2 Tr ansf er Hopper s

Concr et e may be char ged i nt o nonagi t at i ng hopper s f or t r ansf er t o ot her conveyi ng devi ces. Tr ansf er hopper s must be capabl e of r ecei v i ng concr et e di r ect l y f r om del i ver y vehi c l es and have coni cal - shaped di schar ge f eat ur es. Equi p t he t r ansf er hopper wi t h a hydr aul i cal l y oper at ed gat e and wi t h a means of ext er nal v i br at i on t o ef f ect compl et e di schar ge. Do not hol d concr et e i n nonagi t at i ng t r ansf er hopper s mor e t han 30 mi nut es.

2. 2. 1. 3 Trucks

Tr uck mi xer s oper at i ng at agi t at i ng speed or t r uck agi t at or s used f or t r anspor t i ng pl ant - mi xed concr et e must conf or m t o t he r equi r ement s of ASTM C94/ C94M. Al l t r ucks used t o t r anspor t concr et e or gr out shal l be PA DOT i nspect ed and cer t i f i ed f or use. Nonagi t at i ng equi pment may be used f or t r anspor t i ng pl ant - mi xed concr et e over a smoot h r oad when t he haul i ng t i me i s l ess t han 15 mi nut es. Bodi es of nonagi t at i ng equi pment must be smoot h, wat er t i ght , met al cont ai ner s speci f i cal l y desi gned t o t r anspor t concr et e, shaped wi t h r ounded cor ner s t o mi ni mi ze segr egat i on, and equi pped wi t h gat es t hat wi l l per mi t posi t i ve cont r ol of t he di schar ge of t he concr et e.

2. 2. 1. 4 Chutes

When concr et e can be pl aced di r ect l y f r om a t r uck mi xer , agi t at or , or nonagi t at i ng equi pment , t he chut es at t ached t o t hi s equi pment by t he manuf act ur er may be used. Use a di schar ge def l ect or when r equi r ed by t he Cont r act i ng Of f i cer . Separ at e chut es and ot her s i mi l ar equi pment wi l l not be per mi t t ed f or conveyi ng concr et e.

2. 2. 1. 5 Bel t Conveyor s

The Gover nment - owned conveyor s i nst al l ed at t he s i t e ar e avai l abl e f or

SECTI ON 03 31 01. 00 10 Page 12

Cont r act or use. Use of t he Gover nment - owned conveyor s must be coor di nat ed wi t h ongoi ng wor k f or t he M- 22 and Ri ver Chamber Compl et i on cont r act s.

Desi gn and oper at e t o assur e a uni f or m f l ow of concr et e f r om mi xer t o f i nal pl ace of deposi t wi t hout segr egat i on of i ngr edi ent s or l oss of mor t ar and pr ovi de wi t h posi t i ve means f or pr event i ng segr egat i on of t he concr et e at t he t r ansf er poi nt s and t he poi nt of pl aci ng. Const r uct bel t conveyor s such t hat t he i dl er spaci ng does not exceed 36 i nches. The bel t speed must be a mi ni mum of 350 f eet per mi nut e and a maxi mum of 700 f eet per mi nut e. I f concr et e i s t o be pl aced t hr ough i nst al l ed hor i zont al or s l opi ng r ei nf or ci ng bar s, di schar ge t he conveyor concr et e i nt o a pi pe or el ephant t r unk t hat i s l ong enough t o ext end t hr ough t he r ei nf or ci ng bar s.

2. 2. 1. 6 Concr et e Pumps

Concr et e may be conveyed by posi t i ve di spl acement pump when appr oved. The pumpi ng equi pment must be pi st on or squeeze pr essur e. The pi pel i ne must be r i gi d st eel pi pe or heavy- dut y f l exi bl e hose. The i nsi de di amet er of t he pi pe must be at l east t hr ee t i mes t he nomi nal maxi mum- si ze coar se aggr egat e i n t he concr et e mi xt ur e t o be pumped but not l ess t han 4 i nches.

Do not use al umi num pi pe.

2. 2. 2 Vibrators

Al l concr et e i n t he scope of t hi s cont r act i s expect ed t o be sel f - consol i dat i ng and pl aced vi a t r emi e. Thi s par agr aph shal l appl y onl y i f t he Cont r act or pr oposes an al t er nat e const r uct i on met hod t hat r equi r e v i br at or s f or consol i dat i on.

Use vi br at or s of t he pr oper s i ze, f r equency, and ampl i t ude f or t he t ype of wor k bei ng per f or med i n conf or mance wi t h t he f ol l owi ng r equi r ement s:

APPLICATION HEAD DI AMETER

(inches)

FREQUENCY

(VPM)

AMPLI TUDE ( i nches)

Thi n wal l s, beams, etc.

1- 1/ 4 t o 2- 1/ 2 9, 000 t o 13, 500 0. 02 t o 0. 04

General construction

2 t o 3- 1/ 2 8, 000 t o 12, 000 0. 025 t o 0. 05

Det er mi ne t he f r equency and ampl i t ude i n accor dance wi t h COE CRD- C 521.

2. 2. 3 Wor k Pl at f or ms

Wor k pl at f or ms f or pl acement s of pi pe pi l e and sl ab concr et e must be desi gned by t he Cont r act or , shown i n t he wor k pl at f or m dr awi ngs, and appr oved by t he Cont r act i ng Of f i cer . The pl at f or m must be desi gned t o suppor t al l l oads i mposed by t he t r emi e equi pment and al l ot her l oad condi t i ons expect ed dur i ng const r uct i on. The Cont r act or must devel op a compl et e t abul at i on of expect ed l oads and anal yses f or r evi ew by t he Cont r act i ng Of f i cer . The Cont r act or must al so sel ect al l necessar y mat er i al s f or const r uct i on of t he pl at f or m. The ext ent and conf i gur at i on of t he pl at f or m may be expanded dur i ng t he pr ogr ess of t he wor k t o accommodat e t he const r uct i on. A compl et e set of det ai l ed dr awi ngs must be submi t t ed f or t he wor k pl at f or m f or t he Cont r act i ng Of f i cer ' s r evi ew.

Addi t i ons/ r evi s i ons t o t he wor k pl at f or m dur i ng l at er phases of t he wor k must al so be suppor t ed wi t h det ai l ed dr awi ngs and comput at i ons.

SECTI ON 03 31 01. 00 10 Page 13

2. 2. 4 Tr emi e Equi pment

Funnel - shaped hopper s of suf f i c i ent vol ume shal l be r equi r ed at t he t op of al l t r emi e pi pes, but must not be l ess t han 2 cubi c yar ds. Hopper s must be of a s i ze capabl e of r ecei v i ng and passi ng t he concr et e i nt o t he t r emi e pi pe at t he capaci t y r at e of t he bat chi ng, mi xi ng, and conveyi ng equi pment . Al umi num pi pe or equi pment must not be used f or pl aci ng concr et e. The t r emi e pi pe must be of t he s i ze( s) i ndi cat ed on t he dr awi ngs t o per mi t a f r ee f l ow of concr et e. Tr emi e pi pes must be spaced and ar r anged as shown. Tr emi e pi pes must be made of st eel and have wat er t i ght j oi nt s. Hoi st i ng equi pment f or r ai s i ng and l ower i ng t r emi e pi pes as t he concr et e i s pl aced and t ool s f or connect i ng t he pi pe sect i ons must be cont i nuousl y avai l abl e and on hand. Each sect i on of t r emi e pi pe must be sui t abl y secur ed t oget her and a gasket used at each j oi nt t o pr event l eakage. The t r emi e pi pe must be mar ked t o al l ow qui ck det er mi nat i on of t he di st ance f r om t he sur f ace of t he wat er t o t he mout h of t he t r emi e. A st abl e pl at f or m must be pr ovi ded t o t r emi e pi pe dur i ng pl acement s. The pl at f or m must be capabl e of suppor t i ng t he t r emi e whi l e sect i ons ar e bei ng r emoved f r om t he upper end of t he t r emi e. A dr y pi pe wi t h a t i ght f i t t i ng pl ast i c cap and st eel r ei nf or ci ng pl at e at t he bot t om t o pr event cont act of t he concr et e and t he wat er i n t he pi pe shal l be r equi r ed t o st ar t each pl acement . Go- devi l s or s i mi l ar devi ces ar e not permitted.

PART 3 EXECUTI ON

3. 1 PREPARATI ON FOR PLACI NG

3. 1. 1 Embedded I t ems

Bef or e pl acement of concr et e, t ake car e t o det er mi ne t hat al l embedded i t ems ar e f i r ml y and secur el y f ast ened i n pl ace as i ndi cat ed on t he dr awi ngs, or r equi r ed. Embedded i t ems must be f r ee of oi l and ot her f or ei gn mat t er such as l oose coat i ngs or r ust , pai nt , and scal e. The embeddi ng of wood i n concr et e wi l l be per mi t t ed onl y when speci f i cal l y aut hor i zed or di r ect ed. Tempor ar i l y f i l l voi ds i n s l eeves, i nser t s, and anchor s l ot s wi t h r eadi l y r emovabl e mat er i al s t o pr event t he ent r y of concr et e i nt o voi ds. Wel di ng, i ncl udi ng t ack wel di ng, wi l l not be per mi t t ed on embedded met al s wi t hi n 2 f eet of t he sur f ace of t he concr et e.

3. 1. 2 Concr et e on Ear t h Foundat i ons

Ear t h sur f aces upon whi ch concr et e i s t o be pl aced must be cl ean, damp, and f r ee f r om debr i s, f r ost , i ce, and st andi ng or r unni ng wat er . Pr i or t o pl acement of concr et e, compact t he ear t h f oundat i on i n accor dance wi t h Sect i on 35 20 23 DREDGI NG.

3. 2 CONVEYI NG AND PLACI NG CONCRETE

Convey and pl ace concr et e i n accor dance wi t h ACI 301, Sect i on 5. Do not r econst i t ut e concr et e t hat has begun t o sol i di f y.

3. 2. 1 General

Al l pl at f or ms, t r emi e pi pes, r amps and wal kways, as r equi r ed, shal l be compl et ed pr i or t o any pl acement s t o al l ow saf e and expedi t i ous access f or concr et e and wor kmen. Snow, i ce, f l owi ng wat er , l oose par t i c l es, debr i s, and f or ei gn mat t er shal l have been r emoved. Rei nf or cement shal l be secur ed i n- pl ace. Anchor s and ot her embedded i t ems shal l have been

SECTI ON 03 31 01. 00 10 Page 14 posi t i oned and anchor ed. The ent i r e pr epar at i on shal l be accept ed by t he Cont r act i ng Of f i cer pr i or t o pl aci ng. Concr et e pl acement s shal l commence i mmedi at el y af t er f i nal i nspect i on of t he ar ea of pl acement , r ock socket r ei nf or cement , and embedded i t ems.

3. 2. 2 Ti me I nt er val Bet ween Mi xi ng and Pl aci ng

Pl ace concr et e wi t hi n 30 mi nut es af t er di schar ge i nt o nonagi t at i ng equi pment . When concr et e i s t r uck- mi xed or when a t r uck mi xer or agi t at or i s used f or t r anspor t i ng concr et e mi xed by a concr et e pl ant mi xer , t he concr et e shal l be del i ver ed t o t he s i t e of t he wor k, and di schar ge shal l be compl et ed wi t hi n 1- 1/ 2 hour s af t er i nt r oduct i on of t he cement t o t he aggr egat es. When t he l engt h of haul makes i t i mpossi bl e t o del i ver t r uck- mi xed concr et e wi t hi n t hese t i me l i mi t s, use set r et ar di ng admi xt ur e t o ext end t he wor ki ng t i me of t he concr et e. .

3. 2. 3 Ambi ent Condi t i ons

Concr et e pl acement shal l not be per mi t t ed when weat her condi t i ons pr event pr oper pl acement and consol i dat i on, or when condi t i ons wi l l adver sel y af f ect t he qual i t y of t he concr et e. Unl ess ot her wi se speci f i ed or appr oved, t he ambi ent t emper at ur e of t he pl acement ar ea and al l sur f aces t o r ecei ve concr et e shal l be 32 degr ees F or above. I n hot weat her , conveyi ng and pl acement equi pment shal l be cool ed, i f necessar y, t o achi eve t he speci f i c concr et e t emper at ur e.

Concr et e shal l be mai nt ai ned at a t emper at ur e above 32 degr ees F at al l t i mes dur i ng t he cur i ng pr ocess.

3. 2. 4 Pr ot ect i on of Concr et e

The t emper at ur e di f f er ent i al of t he concr et e bet ween t he geomet r i c cent er of t he pl acement ( mi d- wi dt h, mi d- l engt h, mi d- hei ght ) and t he cent er of each f ace wi t h t he sensor pl aced 3 i nches bel ow t he concr et e sur f ace shal l be mai nt ai ned at l ess t han 25 degr ees F. Each f ace i ncl udes t he cent er of t he t op sur f ace, bot t om sur f ace, and at t he cent er of al l f our s i de sur f aces. An ext er nal dat a l ogger shal l be mai nt ai ned out si de of t he concr et e t o r ecor d t he ambi ent ai r or wat er t emper at ur e. The t emper at e di f f er ence shal l be det er mi ned bet ween al l i nt er nal sensor l ocat i ons i n t he pl acement and shal l not be al l owed t o exceed 25 degr ees F. I f t he t emper at ur e di f f er ence exceeds t hi s r ange, addi t i onal st eps shal l be t aken t o pr ovi de i nsul at i on or cool i ng, as appr opr i at e, i n accor dance wi t h par agr aphs Col d- Weat her Requi r ement s and Hot - Weat her Requi r ement s.

Once t he concr et e i s pl aced, i nsul at i on or cool i ng shal l not be r emoved unt i l t he hot t est i nt er nal concr et e t emper at ur e i s wi t hi n 25 degr ees F of t he aver age dai l y wat er t emper at ur e. The aver age dai l y wat er t emper at ur e shal l be det er mi ned by moni t or i ng t he 7- day movi ng aver age of t he dai l y mean t emper at ur e f or t he pr evi ous 3 cal endar days, t he pr edi ct ed cur r ent day, and t he pr edi ct ed dai l y mean t emper at ur e f or t he f ol l owi ng 3 cal endar days. The cont r act or shal l pr epar e and submi t a weekl y t emper at ur e moni t or i ng r epor t i n gr aph f or mat f or al l concr et e pl acement s under pr ot ect i on. Equi pment f or moni t or i ng t he i nt er nal concr et e and ext er nal ambi ent t emper at ur e shal l consi st of di gi t al , un- i nt er r upt i bl e and non- al t er abl e dat a l ogger s secur ed i nt o posi t i on and cast i nt o t he concr et e. The equi pment shal l be f ur ni shed by Engui s Const r uct i ve I nt el l i gence, I nt el l i Rock Dat a Loggi ng syst em, or an appr oved equal . I n addi t i on t o adequat e r emot e r eader s f or al l pl acement s bei ng moni t or ed, t he Cont r act or shal l pr ovi de 2 hand hel d dat a r eader s. Remot e r eadi ng

SECTI ON 03 31 01. 00 10 Page 15 devi ces and hand hel d r ecor der s shal l be pr ovi ded t o t he Concr et e QC Manager and t he Cont r act i ng Of f i cer .

No vi br at or y ear t h compact i on equi pment or pi l e- dr i v i ng equi pment shal l be oper at ed wi t hi n 80 f eet hor i zont al l y of concr et e t hat has not at t ai ned a compr essi ve st r engt h of 2000 psi and i s l ess t han 5 cal endar days ol d.

The i n- pl ace compr essi ve st r engt h shal l be as det er mi ned by t he par agr aph St r engt h Det er mi nat i on Usi ng Mat ur i t y Met hod.

3. 2. 5 Col d- Weat her Requi r ement s

Pl ace concr et e i n col d weat her i n accor dance wi t h ACI 306R.

3. 2. 6 Hot - Weat her Requi r ement s

Pl ace concr et e i n hot weat her i n accor dance wi t h ACI 305R.

3. 2. 7 Under wat er Concr et e Pl acement

3. 2. 7. 1 General

Use gr avi t y f ed pi pes t o pl ace under wat er concr et e usi ng t he dr y t ube t r emi e met hod.

3. 2. 7. 2 Pl acement of Concr et e

The di schar ge pi pe shal l f i r st be posi t i oned t o i nt r oduce concr et e at t he shaf t bot t om. Fr ee f al l pl acement of concr et e shal l not be per mi t t ed.

Pl acement of concr et e under wat er shal l be per f or med wi t h a t r emi e pi pe of t he t ype and si ze appr oved by t he Cont r act i ng Of f i cer .

At t he st ar t of t he t r emi e pl acement , t he bot t om of t he t r emi e pi pe shal l be seal ed wi t h a t i ght f i t t i ng pl ast i c cap and st eel r ei nf or ci ng pl at e, or a sacr i f i c i al pl at e and gasket . " Rabbi t s" or " pi gs" wi l l not be per mi t t ed f or seal i ng t he t r emi e pi pe. The pi pe shal l be kept dr y wi t h a seal ed pl at e as i t i s l ower ed i nt o t he shaf t . The Cont r act or ' s CQC st af f shal l ver i f y t hat t he pi pe i s dr y by v i sual exami nat i on or by soundi ng wi t h a wei ght . The t r emi e pi pe shal l be ext ended and shal l r est on t he bot t om of t he shaf t whi l e t he t r emi e pi pe and hopper ar e char ged wi t h concr et e.

Once char ged, t he t r emi e pi pe shal l be r ai sed 6 i nches of f t he bot t om of t he shaf t , and t he seal ed pl at e shal l be r el eased t o i ni t i at e pl acement of t he concr et e. The concr et e shal l be deposi t ed so t hat i t ent er s t he mass of t he pr evi ousl y pl aced concr et e, di spl aci ng wat er wi t h mi ni mum di st ur bance t o t he sur f ace of t he r i s i ng col umn of concr et e.

Concr et e shal l be deposi t ed i nt o t he t r emi e hopper and t he pi pe f ul l y char ged wi t h concr et e. When t he pi pe i s f ul l y f i l l ed wi t h concr et e, t he pl at e shal l be opened and t he concr et e al l owed t o f l ow ont o t he bot t om of t he shaf t . The pi pe shal l be hel d near t he bot t om of t he shaf t unt i l a mi ni mum 4- f oot head of concr et e bui l ds ar ound t he pi pe.

I f a seal i s l ost dur i ng t he pl acement , t he t r emi e pi pe shal l be compl et el y wi t hdr awn, t he seal r epl aced, t he pi pe r eset i nt o t he concr et e, and t he oper at i on r est ar t ed as soon as possi bl e.

When near i ng compl et i on of t he t r emi e pl acement , i t may be necessar y t o r ai se t he t r emi e pi pe posi t i on i n t he concr et e col umn as t he di f f er ent i al head decr eases bet ween t he concr et e i n t he t r emi e pi pe and t he concr et e and wat er col umn i n t he pi pe pi l e.

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A suf f i c i ent head of concr et e shal l be mai nt ai ned wi t hi n t he t r emi e pi pe t o sust ai n a posi t i ve di f f er ent i al head r el at i ve t o t he sur r oundi ng concr et e and wat er col umn i n t he shaf t . Pl acement shal l pr oceed wi t hout i nt er r upt i on unt i l t he concr et e has been br ought t o t he r equi r ed el evat i on. The t r emi e pi pe shal l not be moved hor i zont al l y dur i ng a pl aci ng oper at i on unl ess r emoved, moved, and pr oper l y r est ar t ed. The si ze and number of t r emi e pi pes shal l be sel ect ed t o pr ovi de ef f ect i ve hor i zont al f l ow of concr et e.

The Cont r act or shal l cont i nuousl y measur e and r ecor d t he l evel of concr et e wi t hi n t he pi l e casi ng or s l ab. Concr et e cur ves shal l be moni t or ed by t he Cont r act or ' s CQC st af f dur i ng t he pl acement .

The t r emi e pl acement shal l be cont i nued unt i l concr et e r eaches t he r equi r ed el evat i on.

3. 2. 8 I nt er r upt ed Concr et e Pl acement

Pl ace concr et e i n a cont i nuous, uni nt er r upt ed oper at i on. I f concr et e pl acement i s i nt er r upt ed f or any ci r cumst ances, f ol l ow t he f or mal pr ocedur es submi t t ed f or i nt er r upt ed concr et e pl acement wi t hi n t he appr oved Concr et e Wor k Pl an.

I ncl ude t he f ol l owi ng r equi r ement i n t he pr ocedur e f or i nt er r upt ed concr et e pl acement :

I f concr et e pl acement i s i nt er r upt ed f or a per i od of t i me such t hat t he concr et e al r eady i n pl ace becomes l ess t han 5- i nches, concr et e pl acement wi l l not be cont i nued, t he r ei nf or ci ng shal l be r emoved and t he concr et e shal l be pumped or augur ed out of t he shaf t . The shaf t shal l be c l eaned, pr epar ed, and accept ed bef or e concr et e pl acement i s restarted.

3. 3 CONSOLI DATI ON OF CONCRETE

Concr et e pl aced under wat er shal l be f or mul at ed t o be sel f - consol i dat i ng.

3. 4 FINISHING

No f i ni shi ng i s r equi r ed f or concr et e pl aced under wat er . Pi l e casi ngs t o be cut t o hei ght af t er concr et i ng shal l be st r uck t o t he cut - of f hei ght and excess concr et e r emoved f r om t he pi l e casi ng.

3. 5 TESTS AND I NSPECTI ONS

Submi t t est r esul t s and i nspect i on r epor t s, dai l y and weekl y. Test s and i nspect i n accor dance t he f ol l owi ng:

3. 5. 1 General

Per f or m t he i nspect i ons 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 and submi t r epor t s as r equi r ed. When, i n t he opi ni on of t he Cont r act i ng Of f i cer , t he concr et i ng oper at i on i s out of cont r ol , cease concr et e pl acement . Use a USACE val i dat ed l abor at or y f or concr et e and mat er i al testing.

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3. 5. 2 Test i ng and I nspect i on Requi r ement s

3. 5. 2. 1 Concr et e Mi xt ur e

3. 5. 2. 1. 1 Sl ump and Sl ump Fl ow Test i ng

Conduct s l ump and sl ump f l ow t est i ng once per t r uck f or t he f i r st t hr ee t r ucks i n a shi f t t o est abl i sh mi xt ur e uni f or mi t y. Sl ump and sl ump f l ow t est s shal l al so be conduct ed when compr essi ve st r engt h speci mens ar e f abr i cat ed. Ther eaf t er conduct s l ump and sl ump f l ow t est i ng at l east once f or ever y 50 cubi c yar ds pl aced. Make addi t i onal t est s when excessi ve var i at i on i n wor kabi l i t y i s r epor t ed by t he pl aci ng f or eman or Gover nment qual i t y assur ance r epr esent at i ve. Conduct t est s i n accor dance wi t h ASTM C143/ C143M and ASTM C1611/ C1611M.

3. 5. 2. 1. 2 Temperature

Measur e t he t emper at ur e of t he concr et e when compr essi ve st r engt h speci mens ar e f abr i cat ed. Measur e i n accor dance wi t h ASTM C1064/ C1064M.

Repor t t he t emper at ur e al ong wi t h t he compr essi ve st r engt h dat a.

3. 5. 2. 1. 3 Compr essi ve- St r engt h Speci mens

Obt ai n sampl es and t est concr et e f or qual i t y cont r ol dur i ng pl acement .

Sampl e f r esh concr et e f or t est i ng i n accor dance wi t h ASTM C172/ C172M.

Make si x t est cyl i nder s. Test concr et e f or compr essi ve st r engt h at 7 and 28 days f or each desi gn mi x and f or ever y 100 cubi c yar ds of concr et e.

Test t wo cyl i nder s at 7 days; t wo cyl i nder s at 28 days; and hol d t wo cyl i nder s i n r eser ve. Pr epar e concr et e t est speci mens i n accor dance wi t h ASTM C31/ C31M. Per f or m compr essi ve st r engt h t est i ng i n accor dance wi t h

ASTM C39/ C39M.

3. 5. 2. 1. 4 Ther mal I nt egr i t y Pr of i l i ng

Twel ve of t he t hi r t y ei ght pr oduct i on Abut ment Pr ot ect i on Wal l pi l es and bot h Demonst r at i on Pi l es shal l be i nst r ument ed f or Ther mal I nt egr i t y Pr of i l i ng ( TI P) as descr i bed i n ASTM D7949, Met hod B f or embedded t her mal sensor s. The speci f i c pr oduct i on pi l es t o be i nst r ument ed f or TI P shal l be at t he di r ect i on of t he Cont r act i ng Of f i cer .

The pur pose of TI P i s t o moni t or t he t emper at ur e pr of i l es al ong t he dept h of t he shaf t as t he concr et e hydr at es, wi t h ar eas of l ower t emper at ur e i ndi cat i ng pot ent i al f l aws such as i ncl usi ons, honeycombi ng, or l ack of cement par t i c l es. Ar eas of pot ent i al f l aws shal l be subj ect t o f ur t her i nvest i gat i on of concr et e by cor i ng as di r ect ed by t he Cont r act i ng Of f i cer .

3. 5. 2. 1. 4. 1 Shaf t Pr epar at i on

Embedded t her mal sensor s shal l be secur ed t o and al i gned wi t h t he f our l ongi t udi nal r ei nf or cement bar s i n t he upper por t i on of t he Abut ment Pr ot ect i on Wal l pi l es. I n t he l ower por t i on of t he pi l es, t he sensor s shal l be secur ed t o t he i nsi de f l ange of t he k i ng pi l e. Wi r es connect ed t o t he t her mal sensor s shal l be adequat el y secur ed so t hat t he sensor l ocat i ons ar e not al t er ed dur i ng concr et e pl acement . Sensor s shal l be embedded al ong t he f ul l l engt h of t he pi l e, wi t h t he l owest el evat i on sensor s pl aced wi t hi n 6 i nches of t he bot t om of t he pi l e.

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3. 5. 2. 1. 4. 2 TI P I nst al l at i on and Recor di ng

Dur i ng i nst al l at i on of pi l es i nst r ument ed f or TI P, t he cont r act or shal l measur e and r ecor d t he dept h t o t he t op of t he concr et e usi ng a wei ght ed t ape measur e f or at l east ever y 5 cubi c yar ds pl aced.

Temper at ur e r ecor di ng shal l st ar t as ear l y af t er concr et e pl acement as pr act i cal and shal l per i odi cal l y r ecor d t emper at ur es at i nt er val s of no gr eat er t han one hour f or up t o 28 cal endar days.

3. 5. 2. 1. 4. 3 TI P Per sonnel and Repor t i ng Requi r ement s

The Cont r act or shal l pr ovi de at hi s expense a speci al i st possessi ng exper i ence wi t h t he i nst al l at i on of TI P wi r es and t he col l ect i on and i nt er pr et at i on of TI P dat a. The speci al i st shal l be pr esent dur i ng t he i ni t i al appl i cat i on of t hese met hods dur i ng t he demonst r at i on pi l e pl acement .