凍害Ⅱ／初期欠陥

[1142] MONOTONIC BEHAVIOR OF HIGH STRENGTH CONCRETE WITH BLAST FURNACE SLAG FINE AGGREGATES UNDER FROST ACTION

Muhammad Aboubakar FAROOQ¹, 佐藤靖彦², 二井谷教治³, 横田弘⁴ (1.Hokkaido University, 2.早稲田大学, 3.オリエンタル白石, 4.北海道大学)

キーワード：Mechanical behavior、 High strength concrete、 Blast furnace slag fine aggregates、 Frost action、 Air-entrainment

Freeze-thaw (F-T) test was performed on cylindrical specimens of air-entrained (AE) high strength (HS) concrete with blast furnace slag (BFS) sand compared to AE HS normal concrete. The strain variation inside concrete specimens during the F-T test was recorded, in addition to the dynamic elastic modulus change and mass loss. Thereafter, the static compression tests were performed on concrete specimens with different frost damage levels to examine the change in mechanical properties. No significant degradation in mechanical properties of both concrete was observed due to frost action.