矿渣对气泡混合轻质土耐久性能的影响

Effect of slag on durability of air bubble mixed lightweight soil

以矿渣掺量为变量,研究了轻质土分别在不同质量分数下的硫酸钠溶液(5%、10%、15%)养护28 d后的外观变化、质量变化与无侧限抗压强度变化,并且通过XRD对反应产物进行了分析,初步得出:轻质土在硫酸盐养护下(试件未破坏时),无侧限抗压强度高于水中养护与标准养护下的无侧限抗压强度;矿渣对轻质土有两方面作用,一方面可以起到密实填充的作用,另一方面会生成新的物质密实机体结构,且当矿渣掺量为50%~70%时,轻质土对硫酸盐及氯盐的抵抗能力最好。

In order to study a kind of corrosion-resistant light soil,the sodium sulfate solution（ 5%,10%,15%） and sodium chloride（ 5%,10%,15%） of light soil at different mass fractions were studied with the slag content as a variable. The changes of appearance,quality and unconfined compressive strength of the solution after curing for 28 days were analyzed. The reaction products were analyzed by XRD and preliminary results were obtained： light soil in sulfate and chlorine under salt conservation（ when the specimen is not destroyed）,the unconfined compressive strength of the unconfined compressive strength is higher than that of the unconstrained compressive strength under water conservation and standard maintenance; the slag has two functions on the light soil,on the one hand,it can play a compact filling. On the other hand,it will generate a new dense body structure,and when the slag content of 50% ~ 70%,light soil resistance to sulfate and chloride salt best; widely distributed holes in light soil,it can reduce the destruction of light soil caused by the swelling substances produced by the reaction.