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Identification of aggregates causing poor concrete performance when frozen
Tests used to develop simple, fast, and practical procedure for identifying coarse aggregates that undergo destructive volume changes when frozen in concrete are described; procedure using Whittemore strain gage and simple deep-freeze unit is suggested; 32 different concretes, containing coarse aggregates ranging from crushed trap rock and limestone to variety of gravels from glacial and nonglacial sources, were analyzed; concrete specimens (3×3×16 in.) were fabricated and exposed to alternate cycles of freezing and thawing while in water, in accordance with ASTM test designation C290.
Identification of aggregates causing poor concrete performance when frozen
Tests used to develop simple, fast, and practical procedure for identifying coarse aggregates that undergo destructive volume changes when frozen in concrete are described; procedure using Whittemore strain gage and simple deep-freeze unit is suggested; 32 different concretes, containing coarse aggregates ranging from crushed trap rock and limestone to variety of gravels from glacial and nonglacial sources, were analyzed; concrete specimens (3×3×16 in.) were fabricated and exposed to alternate cycles of freezing and thawing while in water, in accordance with ASTM test designation C290.
Identification of aggregates causing poor concrete performance when frozen
Nat Research Council -- Highway Research Board -- NCHRP Report
Walker, R.D. (author)
1965
47 pages
Report
English
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