Abstract
Recycled construction and demolition (C&D) materials have recently gained attention as valuable resources and are widely applied in pavements, ground improvements, and engineered fills. However, the large amounts of solid waste generated by C&D sectors have imposed significant pressure on the environment. Current studies primarily focus on the physical properties and shear strength responses of C&D materials. In this study, the dynamic behaviors (dynamic stress-strain behavior and liquefaction resistance) of recycled concrete aggregate (RCA) and quartz sand in an undrained condition were investigated through cyclic triaxial tests and compared. It was observed that RCA has a higher liquefaction resistance than quartz sand, which had a beneficial effect on the earthquake response. Meanwhile, owing to its mineralogy, RCA was crushed during cyclic loading, which decreased the liquefaction resistance especially under a higher confining pressure. The effects of crushability of the RCA on the dynamic behavior were discussed. Finally, the sensitivity of liquefaction resistance to the B value was examined.
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