半柔性路面用地聚物砂浆配合比设计

以粉煤灰为主要原料,矿渣微粉为掺加剂,水玻璃(Na₂O·nSiO₂)和氢氧化钠为复合激发剂,标准砂为细集料,通过正交实验进行配合比设计,运用极差和方差分析流动度、凝结时间、泌水率、抗压及抗折强度、收缩膨胀率的影响规律,在常温条件下制备半柔性路面用地聚物砂浆.实验结果表明:半柔性路面用地聚物砂浆配合比的水胶比为0.45~0.50,砂胶比为0.2,矿渣微粉取代率为0.3,碱激发剂掺量为0.14~0.17.

Mix Proportion Design of Geopolymer Mortar for Semi Flexible Pavement

With fly ash as the main raw material, slag micro powder as the admixture, water glass(Na₂O · nSiO₂)and NaOH as the composite activator, standard sand as fine aggregate, the mix proportion design was carried out by orthogonal experiment. The influence rules of each factor on the fluidity, setting time, bleeding rate, compressive strength, flexural strength and shrinkage rate were analyzed by range and variance, and the semi flexible pavement geopolymer mortar was prepared under normal temperature condition. The test results show that the water-binder ratio of geopolymer mortar for semi flexible pavement is 0.45-0.50, the binder ratio is 0.2, the substitution rate of slag powder is 0.3, and the dosage of alkali activator is 0.14-0.17.