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<br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />2.02 <br /> <br />2.03 <br /> <br />SECT I ON 0:3300 <br /> <br />2. <br /> <br />Aggregates: <br /> <br />ASTM C-33 and the following: <br /> <br />(a) Fine aggregate: clean, sharp, natural sand, free <br />from loam, clay, lump~, or other deleterious substan- <br />ces.. <br /> <br />(b) Coarse aggregate: clean, uncoated, <br />locally available, and containing no clay, <br />or foreign matter. <br /> <br />processed, <br />mud, loam, <br /> <br />(c) Store fine and coa~se aggregate separately. <br /> <br />3. <br /> <br />Water: <br />amounts <br />potable. <br /> <br />Clean, free f~om oil, acid, alkali, injurious <br />of vegetable matter, and other impurities; <br /> <br />4. <br /> <br />Admixtures: ASTM C-494 or ASTM C-260. <br />dance with manufacturer's directions. <br /> <br />Mix in accor- <br /> <br />MIXES. <br /> <br />Concrete mixes: ACI 318, 614, and 304, ready-mixed or <br />job-mi >:ed to obtai n 3000-psi, 28-day compressi ve strength; <br />slump not to e>:ceed 4". <br /> <br />FABRICATIONS. <br /> <br />Shop-fabricated reinforcing: <br /> <br />ACI 318, Section <br /> <br />= <br />...J. <br /> <br />PART 3 - EXECUTION <br /> <br />3.01 REINFORCEMENT AND EMBEDDED ITEMS. <br /> <br />3.02 <br /> <br />A. <br /> <br />Preparation. Clean reinforcement of loose rust, <br />scale, and other materials which reduce or destroy <br />with concrete. <br /> <br />mill <br />bond <br /> <br />B. <br /> <br />Placement: <br /> <br />CRSI Manual <br /> <br />CONCRETE PLACEMENT. <br /> <br />A. <br /> <br />Notify Engineer 48 hours before placing concrete. <br /> <br />B. <br /> <br />Place concrete in complia~ce with ACI 614 and as herein <br />specified. Deposit conti~uously or in layers of such <br />thickness that no concrete will be placed on hardened <br />concrete in a manner to cau~e seams or planes of weakness. <br />If a section cannot be placed continuously, provide con- <br />struction joints as specified below. Deposit concrete <br />near to or in its final location to avoid segregation <br />caused by rehandling or flo~ing. Deposit floor slab con- <br />crete between screeds at fi~ished level. Set screeds to <br />insure maximum slab thickness, allowing 1/8" shrinkage. <br />Screed with straight-edge ~nd leave no hollows or pockets <br /> <br />42 <br />