石灰石粉对轻骨料混凝土力学性能的影响

Effect of the limestone powder on the mechanical properties of pumice concrete

采用内掺0%、10%、20%、30%、40%和50%的石灰石粉代替等量砂子来配制浮石混凝土,研究不同掺量的石灰石粉对轻骨料混凝土工作性能、抗压强度和劈裂抗拉强度的影响,并借助扫描电镜观察分析石灰石粉对轻骨料混凝土性能的影响。结果表明,石灰石粉的最佳掺量为30%,混凝土内部掺入石灰石粉后生成碳铝酸盐,使水泥石结构更密实,石灰石粉的填充作用有利于轻骨料混凝土后期强度的增加。

Make the pumice concrete doped 0%,10%,20%,30%,40%,50%limestone power instead of the same amount of sand.Then study the compressive strength and splitting tensile strength and study the compressive strength and splitting tensile strength.And observe and analyze the mechanism of doping limestone powder's impact on the post-performance lightweight aggregate concrete by means of SEM.The results show that:the optimal amount of limestone powder is 30%.Internal pumice concrete limestone powder generates carbon aluminate which makes cement structure more dense.Besides limestone powder's filling effect is beneficial to the development of the late strength of pumice concrete.