Experimental study on the compressive strength of ultrahigh performance prefabricated concrete walling materials

Abstract

Ultra High Performance Concrete (UHPC) is a new type of cement-based material composed of cement, fine aggregates, fibers and a high performance water reducing agent. In the present study, experiments were performed to assess the influence of the different components on the performances of this material. It is shown that the compressive strength increases with an increase in the silica fume content. With an increase in the steel fiber content, the compressive strength value of the sample first increases and then attains a plateau. When the volume content of steel fiber exceeds 1.5%, the compressive strength displays a downward trend. The coarse aggregate content has a great influence on the compressive strength. When it is 24%, the UHPC test block under four water-binder ratios attains the maximum compressive strength value.