Hybrid Fiber Concrete Enhance Toughening Effect Study

Based on the summarization only mixed fiber concrete based on the advantages and disadvantages of the concrete structure, in order to improve the shock resistance, flexural sexual performance and durability as purpose, in considering economy, and puts forward the premise of low content of steel fiber (s)-(p) polypropylene fiber mixed enhance the concrete conception. First of all, to enhance and toughening high-performance concrete fiber reinforced concrete influence factors (such as the polypropylene fiber dosage, steel fiber dosage, water-binder ratio and adding powder etc.) make the admixture of analysis, and adopted four factors on the three levels orthogonal test hybrid fiber concrete mixing of optimized design, make sure the enhancement, toughening high-performance concrete mixing the best test, and the influence degree of each affecting factor made sort, Then, through to the grain concrete, steel fiber reinforced concrete, polypropylene fiber concrete, steel fiber (s)-(p) of polypropylene fiber concrete mixed enhance workable performance, compressive performance, fracturing performance, flexural performance, impact resistant properties of the contrast experiment research, a large number of experimental results show that the hybrid fiber adopt rational design, high elastic material (such as steel fiber) fiber and high ductility fibers (such as polypropylene fibre concrete improve together composite material strength and toughness, exert its "positive hybrid effect" to enhance the concrete, and widened the application scope of high-performance fiber reinforced concrete, have remarkable economic benefits.