矿物掺合料对复合注浆材料性能优化研究

Study on Performance Optimization of Mineral Admixtures for Composite Grouting Materials

摘要:

针对水泥混凝土路面板底脱空等病害，系统研究了硅灰、粉煤灰等矿物掺合料，减水剂掺量和乳化沥青掺量等对复合注浆材料性能的影响，研发的复合注浆材料初始流动度不大于20 s，30 min流动度不高于30 s，与水泥稳定材料相比，复合注浆材料固结体7 d无侧限抗压强度略低，但挠度和水稳定性显著提高。

Abstract:

Aiming at the disease of slab bottom cavity of cement concrete pavement, the impacts of silica fume, fly ash and the other mineral admixtures, and water reducer content and emulsified asphalt content on the properties of the composite grouting materials are systematically studied. The initial fluidity of the studied composite grouting material is not larger than 20 s, and the fluidity in 30 min is not higher than 30 s. Compared with the cement stabilized materials, the 7 d unconfined compressive strength of the consolidated body of composite grouting material is slightly lower, but the deflection and water stability are significantly improved.