An Experimental Study on Shear Behavior of Slurry Infiltrated Mat Concrete Slabs

Abstract

Recently, the Slurry Infiltrated Mat Concrete (SIMCON) has a serious level of attention within civil engineering fields. Within such types of composites, good mechanical properties can be gained if the cement slurry was sprinkled into micro steel fibers matrix. The punching stresses were usually concentrated in a defined parameter as a column reaction against slabs loads and a brittle failure can result. The present study tires investigate the punching shear behavior of SIMCON slabs by conducting an experimental research program. The program included casting and testing of eight SIMCON slabs. The variables of this study focused on, the slab thickness, the volume fraction of micro steel fibers, the propagation nature of micro steel fibers, and the presence/absence of steel reinforcement. The results proved that the punching behavior of SIMCON slabs was more than that of normal concrete slabs. Also, it appears that when the micro steel fibers propagated in all slabs domains, the punching shear behavior was higher than the slabs that micro steel fibers located in in the critical zone of punching only due to the difference in mechanical integrity. In addition, that indicates the first cracking load may reach25.71% in 50mm slabs while it was 10% in 70mm slabs, and the ultimate load increase can reach 49% in 50mm slabs and 26.4% in 70mm slabs.