Study On The Reactive Powder Concrete With Blast-Furnace Slag And It's High Durabilities

Depending on the densified system containing homogeneously arrayed ultra-fine particles(DSP) and the basic principles of reactive powder concrete(RPC) adopted by foreign researchers specialized in building materials, considering the characteristics of ultra-fine addition which can improve the workability and micro-structure of cement based materials and enhance the cementitious materials' packing density, we added blast slag silica fume crushed quartz superplasticizer and steel fiber into portland cement to produce the RPC by normal technology methods. With the very low water to cement ratio, RPC has ultra-high strength high ductility and low permeability. In this paper, the compressive strength of RPC can reach to a high point with the number approximately 135MPa.As illustrated from the study results, we can approve some fundamental conclusions: There are big effects on RPC with deferent kinds and properties of raw materials and deferent curing conditions; stress-strain curve shows the process of destroy with RPC samples; X-ray diffraction analysis indicates that heat treatment at temperatures 90℃accelerate the hydration of RPC sharply, therefore, mechanical and microstructural properties of RPC are highly dependent on heat treatment; It is believed that RPC materials have excellent resistance to chloride permeability; During the heat treatment, the shrinkage of RPC developed quickly because of chemical reactions; The RPC with slag mostly has the advantage of RPC without slag about resistance to solutions corrosion.