Experimental investigation on clay stabilized by cement and waste brick fine aggregate

The disposal of high water content clay and waste bricks (including other construction wastes) has caused huge resource waste and serious environment of pollution. How to effectively solve these problems is a hot issue. An innovative approach mixing cement and brick waste fine aggregate is prposed to stabilize the high water content clay (called as double mixing stabilized clay, DMSC). The laboratory experiments are conducted to test the unconfined compressive strengths of DMSC with different mixing proportions and curing time. In addition, the influences of waste brick fine aggregate and cement content on the strength and compressive deformation characteristics of DMSC are studied respectively. The results indicate that when the cement content is greater than or equal to 8%, adding the waste brick fine aggregate can enhance the strength of the cement-stabilized clay with high water content, and the growth rate of early strength is faster than that of late strength. It is noteworthy that the addition of waste brick fine aggregate increases the variability of DMSC. The failure modes of DMSC is mainly the plastic shear failure, and its failure strain generally ranges from 2.5% to 3%, so the toughness of DMSC is better than that of the general cement-stabilized clay.