In order to rationally design and utilize steel fiber concrete,the concrete mixed with steel fibers was regarded as a multi-phase composite material consisting of mortar,aggregate,interface,initial defects,steel fibers,and large porosity at the interface,and a step-by-step homogenization method was used to establish a predictive concrete mixing model to solve the mixing model by combining the dif-ferentiation method,the Mori-Tanaka method,and the Christensen's three-phase model.Mixed inclusions model,the model prediction results and the test results were in good agreement.The analysis results show these as follows.The nature of the aggregate has a significant effect on the modulus of elasticity of the steel fiber concrete,the overall modulus of elasticity of the steel fiber concrete with the increase of the water-cement ratio,the thickness of the transition zone of the interface,the volume fraction of the pores and decrease,with the increase in the vol-ume fraction of the aggregate,the modulus of elasticity of the aggregate,as well as the increase of the elasticity modulus of the interface.
fiber concreteelastic modulusinterface transition zonepore volumemeso-inclusion theory
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