W912P5-17-B-0001Am5_TSpecs-pages.pdf

Lock Chamber Chi ckamauga Lock Repl acement W912P5- 17- B- 0001 Amendment 0005 Hami l t on Count y, Tennessee

2. 6. 2 I mper vi ous Sheet

I mper vi ous sheet mat er i al s shal l conf or m t o ASTM C171, t ype opt i onal , except , t hat pol yet hyl ene sheet shal l not be used. I mper vi ous- sheet cur i ng met hod shal l be used on el evat ed s l abs r ecei v i ng Ter r azzo f l oor i ng ( or equi val ent ) t o r educe shor t - t er m moi st ur e cont ent of concr et e dur i ng cur i ng.

2. 6. 3 Bur l ap and Cot t on Mat

Bur l ap and cot t on mat used f or cur i ng shal l conf or m t o AASHTO M 182.

2. 7 WATER

Wat er cont ai ni ng oi l , aci d, sal t , al kal i , or gani c mat t er , or ot her del et er i ous subst ances wi l l not be used f or concr et e mi xi ng, t est i ng, pr oduct i on, cur i ng, washi ng equi pment and ot her t asks r el at ed t o concr et e.

The qual i t y of wat er shal l compl y wi t h COE CRD- C 400. Wat er shal l be t est ed accor di ng t o t he met hods c i t ed i n COE CRD- C 400 and shal l have a pH bet ween 6. 5 and 8. 5, maxi mum i r on cont ent of 0. 3 ppm, maxi mum sodi um cont ent of 300 ppm, maxi mum pot assi um cont ent of 300 ppm, maxi mum chl or i ne cont ent of 20 ppm, and maxi mum sul f at e cont ent of 150 ppm. The st r engt h t est s shal l meet t he r equi r ement s of COE CRD- C 406. Test i ng shal l be conduct ed pr i or t o const r uct i on, and t hen t est ed t her eaf t er on a quat er l y basi s and dur i ng per i ods of hi gh f l ow. Tai l wat er f r om t he Tennessee Ri ver bel ow Chi ckamauga Dam and wi t hi n Chi ckamauga Lake above t he dam was accept abl e when t est ed over f i ve ( 5) year s ago; wat er shal l be r et est ed t o ver i f y i t meet s t hese wat er qual i t y r equi r ement s bef or e usi ng f or t he pr oduct i on of concr et e mi xt ur es.

2. 8 NON- SHRI NK GROUT

Non- shr i nk gr out shal l conf or m t o ASTM C1107/ C1107M, Gr ade B or C as appr opr i at e f or t he appl i cat i on, and shal l be a commer ci al f or mul at i on sui t abl e f or t he pr oposed appl i cat i on, and shal l be non- met al l i c . The mi ni mum compr essi ve st r engt h shal l be 7, 000 psi at 28 days, t est ed i n accor dance wi t h ASTM C109/ C109M.

2. 9 GROUT

The Cont r act or shal l be r esponsi bl e f or sel ect i ng pr oper gr out mi xt ur es f or t hi s pr oj ect . Gr out s pl aced i n t he dr y condi t i ons shal l meet t he f ol l owi ng requirements:

a. The t ype of gr out f or each appl i cat i ons, ei t her sand gr out or neat gr out , shal l be i n accor dance wi t h t he Cont r act Dr awi ngs.

b. The compr essi ve st r engt h of neat gr out shal l at t ai n 5, 000 psi mi ni mum at 28 days i n accor dance wi t h ASTM C942.

c. The wat er - t o- cement i t i ous mat er i al s r at i o shal l not exceed 0. 42.

d. The t ot al cement i t i ous mat er i al cont ent i n a sand gr out shal l not be l ess t han 1, 200 pounds per cubi c yar d.

e. The gr out mi xt ur e may cont ai n f l y ash and si l i ca f ume up t o 25 per cent by wei ght of t he t ot al cement i t i ous mat er i al s.

f . The gr out shal l be f l owabl e and pumpabl e. The f l owabi l i t y and

SECTI ON 03 30 01 Page 24