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对不同掺量橡胶再生混凝土的轴压强度和弹性模量进行了测定,并对比了普通混凝土与普通再生混凝土的轴压强度与弹性模量,分析了橡胶粉对再生混凝土轴压强度和弹性模量的影响,使用扫描电镜对混凝土的微观结构进行研究。结果表明,橡胶粉会降低再生混凝土的轴压强度和弹性模量,增大孔隙率并改变孔隙结构。当橡胶粉掺量控制在5%时,橡胶再生混凝土可以满足使用强度要求,且有较好的延性;当橡胶粉掺量超过7%时,由于强度损失过大,橡胶再生混凝土不适合工程应用。
The axial compressive strength and elastic modulus of recycled concrete with different contents of rubber were measured. The axial compressive strength and elastic modulus of ordinary concrete and ordinary recycled concrete were compared. The effects of rubber powder on the axial compressive strength and elastic modulus of recycled concrete were analyzed. The impact of the amount of use of scanning electron microscopy of the microstructure of concrete research. The results show that the rubber powder will reduce the axial compressive strength and elastic modulus of recycled concrete, increase the porosity and change the pore structure. When the content of rubber powder is controlled at 5%, the rubber recycled concrete can meet the strength requirements and has good ductility. When the content of rubber powder exceeds 7%, the rubber recycled concrete is not suitable for engineering application due to the excessive strength loss .