Triaxial Mechanical Properties and Micromechanism of Calcareous Sand Modified by Nanoclay and Cement

Calcareous sand is developed by the fracture of marine biological skeleton under impact seawater. not transported in process deposition. Therefore, calcareous retains characteristics skeleton, low strength, and porous. In order to study effect nanoclay cement on modification sand, a series tests were carried out modified (CCS) with different content nanoclay. this study, triaxial mechanical properties failure modes composite (NCCS) studied through UU test. Then, SEM CCS NCCS samples, micromechanism Nanhai was analyzed. The results showed that (1) shear could be improved adding optimum admixture ratio 8%, its peak stress 23%-39% higher than CCS. (2) strain linear correlation. (3) Compared CCS, internal friction angle cohesion increased 5.2% 52%, respectively. (4) Nanoclay improve compactness structure macroscopic performance improvement cohesion.