The mechanical properties analysis of new rubber concrete

Abstract

Rubber cement-based material is a new kind of green material.At present,the research on the influence of rubber on the properties of cement-based materials has obtained some qualitative results (the addition of rubber can reduce the strength and elastic modulus of materials,but can improve the cracking performance of cement-based materials).But the research of the existing rubber mechanism analysis how to affect the performance of cement base material is not clear,as the research object,this article selects the rubber concrete combination of microscopic,mesoscopic and macroscopic,from the mesoscopic level,based on the composite elastic modulus prediction model,at the same time considering the rubber and the effect of pore rubber concrete elastic modulus prediction formula is established;From the macro level,the rubber concrete compressive strength,bending,split strength,modulus of elasticity drying shrinkage and crack resistance test and research,and analyzed the related theory,based on binary complex modulus of elasticity and calculation model,the equations of the elastic modulus of rubber cement mortar prediction formula,explains the difference of the rubber particle size effects on the mechanical properties of cement mortar,the rubber to reduce the mechanical properties of cement mortar in addition because of its "soft" characteristics.