The Dynamic Mechanics Behavior on Triaxial Compression of the Recycled Aggregate Concrete

The tests under triaxial compression states were conducted on recycled aggregate concrete (RAC) by different stress ratios (-0.1: - 0.1: -1; -0.1: -0.25: -1; -0.1: -0.5: -1; -0.1: -0.75: -1; -0.1: -1: -1) at the strain rates of 10-5/s, 10-4/s, 10-3/s, and 10-2/s. This study was accomplished in the servo-hydraulic multi-axial testing system. The experimental phenomena and failure modes of recycled aggregate concrete under triaxial compression are described, the results of triaxial compressive strength of recycled aggregate concrete are presented, the effects of the strain rate and stress ratio on the triaxial compressive strength of recycled aggregate concrete are studied. This paper built a new dynamic strength criterion. The strength criterion describes the characteristics of structural RAC at different stress ratios and strain rates. The feature of the model is that it can consider the influence of strain rates.