粉煤灰与矿渣对再生骨料混凝土力学性能影响的研究

Mechanical properties of recycled aggregate concrete with fly ash and slag

研究了粉煤灰单掺、粉煤灰与矿渣双掺对再生骨料混凝土(RAC)力学性能的影响,并初步探讨了其影响机理;建立了再生骨料混凝土立方体抗压强度与抗折强度、劈拉强度的相关关系式。试验结果表明:粉煤灰单掺降低了再生骨料混凝土的强度和弹性模量;粉煤灰与矿渣双掺对混凝土强度和弹性模量的影响随两者组合比例不同而有显著差异。

The effect of fly ash and slag on mechanical properties of recycled aggregate concrete (RAC)is disscussed,and the mechanism of action is researched at the meantime.Two empirical equations describing the relationship of the compressive strength with flexural strength and splitting tensile strength of RAC are put forward.The experimental results show that the strength and elastic modulus of RAC are reduced when containing fly ash only.However,the results have a significant difference with the variable rate of fly ash and slag.