On the Mechanical Properties and Freezing-thawing Resistance of Reactive Powder Concrete
活性粉末混凝土力学性能及冻融性能研究

Reactive Powder Concrete (RPC) has superior mechanical properties and high durability. According to the orthogonal design method,nine mix proportions of RPC were designed, and mechanical properties and freezing-thawing resistance of RPC were experimentally investigated. The influence of the water-binder ratio, cement- silica ratio and the steel fiber content on mechanical properties and freezing- thawing resistance of RPC was analyzed. Resu1ts indicate, among these factors effecting mechanical properties and freezing-thawing resistance of RPC, the water-binder ratio is uppermost, however, the influence of steel fiber content on flexural strength and splitting tensile of RPC is obvious, and its influence on compressive strength and thawing resistance of RPC are insignificant. According to the destruction phenomenon of specimen, the acting mechanism of steel fiber is preliminarily explored in this paper.