Triaxial compressive strength of air-entrained concrete after freeze-thaw cycles

摘要

The aim of this study is to characterize the behavior of air-concrete under triaxial compression with stress ratio α_2=σ_2:σ_3 = 1:1. while changing stress ratio α_1=σ_1:σ_3 from 0 to 0.2 after different cycles of freeze-thaw. 100 mm × 100 mm × 100 mm concrete cubes were tested in the experiment Based on the experiment data, the influence of the stress ratio α_1=σ_1:σ_3 and the number of freeze-thaw cycles on the ultimate compressive strength σ_3 are analyzed respectively. A failure criterion expressed in terms of octahedral stress with consideration of the influence of the freeze-thaw cycles is proposed.