Experimental Research on Unconfined Compressive Strength of Artificially Cemented Sand

摘要

Unconfined compressive strength tests and calcium carbonate (CaCO_3) quantitative chemical tests are conducted on artificially cemented sand which have different cement ratio (C_v) and curing time (t). Through the analysis of experimental results, the unconfined compressive strength (q_u) of cemented sand are affected by curing time (t), cement ratio (C_v) and void ratio (η). Test results show that the longer the curing time (t), the lower the void/cement ratio (η/C_v) and the higher calcium carbonate/calcium hydroxide content ratio (CaCO_3/Ca(OH)_2 ratio or m_C/m_H), the higher the unconfined compressive strength (q_u) of cemented sand. It is established the compressive strength equation based on the variables of cement ratio (C_v), void ratio (η) and curing time (t). By m_C/m_H-q_u curve analysis, it is obtained the quantitative relation of chemical composition and mechanical strength.