半柔性路面灌注式水泥基胶浆强度影响因素研究
Research on Influencing Factors of Strength of Pouring Cement-Based Glue for Semi-Flexible Pavement

灌注式半柔性路面结构是在柔性的大空隙基体沥青混合料(连通空隙率在20%~30%之间)中灌注刚性较强的水泥基胶凝材料，凝结硬化之后形成刚柔并济的复合路面，水泥胶浆强度决定半柔性路面结构的承载能力。课题组通过正交试验对比研究水胶比、砂率、粉煤灰掺量、矿渣粉掺量、减水剂掺量对水泥胶浆3 d、7 d、28 d强度影响，结果表明：水胶比与粉煤灰掺量对胶浆强度变化影响较大，砂率、矿渣粉掺量与减水剂掺量对胶浆强度变化影响较小；随着水胶比与粉煤灰掺量的增加，胶浆强度有较明显的降低；随着矿渣粉与减水剂掺量的增加，胶浆强度有所降低但降幅没有显著性变化；随着砂率掺量的增加，胶浆强度有所提高但提高幅度没有显著性变化。
Pouring semi-flexible pavement structure is to pour a rigid cement-based cementitious material into a flexible large-void matrix asphalt mixture (connected porosity is between 20% and 30%), and form a rigid and flexible combination after setting and hardening. For composite pavement, the strength of cement mortar determines the bearing capacity of semi-flexible pavement structure. The research group conducted a comparative study on the effects of water-binder ratio, sand ratio, fly ash content, slag powder content, and water-reducing agent content on the strength of cement mortar at 3 d, 7 d, and 28 d through orthogonal experiments. The results showed that: the amount of fly ash has a greater impact on the strength of the mortar, and the sand ratio, the amount of slag powder and the amount of water-reducing agent have a smaller effect on the strength of the mortar; as the water-binder ratio and the amount of fly ash increase, the strength of the mortar has been significantly reduced; with the increase in the amount of slag powder and water reducing agent, the strength of the mortar is reduced, but there is no significant change in the decrease; with the increase in the amount of sand, the strength of the mortar has increased, however, there was no significant change in the increase.