Freezing and Thawing Durability of High Strength Silica Fume Concreteby Mohsen G. Kashi, Virginia Polytechnic Inst &, State Univ, United States,
Richard E. Weyers, Virginia Polytechnic Inst &, State Univ, United States,
Abstract: Specimens from 27 batches of concrete with a water to cementitious (cement plus silica fume) ratio of 0.25 to 0.32, with and without entrained air, were tested for freeze-thaw durability in accordance with ASTM C666, procedure A (freezing and thawing in water). In addition, another set of similar specimens were moist cured for 28 days instead of 14 days and tested in accordance with ASTM C666, procedure A to determine the effect of curing time on the freeze-thaw durability of high strength concrete. Results show that non-air entrained high strength concrete with water-cementitious ratio of less than 0.30, regardless of the length of curing time, is frost resistant. Non-air entrained concrete with water-cement ratio of 0.32 is durable if silica fume is not used.
Subject Headings: Freeze and thaw | Material durability | Cement | Silica | High-strength concrete | Curing | Water management
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