Composite grouting material (CGM) is an important part of constructing the semi-flexible pavement (SFP). The usage of CGM can improve pavement durability and rutting resistance in heavy-duty traffic. Owing to the environmental protection and performance requirements for grouting in loose sediments, the geopolymer grouting material (GPGM) as a new type of CGM is designed by a combination of powder materials, alkali and activator. The response surface method (RSM) is used to study the influence of three independent constituents (powder quality ratio, sodium oxide content, and water-binder ratio) as well as their interactions on four response variables (fluidity, 7 d dry-shrinkage ratio, 7 d compressive strength, and 28 d compressive strength) of GPGM. Furthermore, three types of additives, including water reducer, shrinkage reducing admixture and polymer latex, are taken into account to design the expected responses of GPGM by using the orthogonal test design method (OTDM). Finally, the micro detection experiments are built to compare the micro characteristics of GPGM blended with and without additives. The results show that the optimal mix proportion of GPGM can be obtained by RSM and OTDM. The micro performance tests and analysis can well explain the mechanism of inner constituents in GPGM.

复合灌浆材料（CGM）是建造半柔性路面（SFP）的重要组成部分。CGM 的使用可以提高路面耐久性和重型交通中的车辙阻力。由于对松散沉积物注浆的环保和性能要求，地聚合物注浆材料（GPGM）作为一种新型的CGM，由粉体材料、碱和活化剂相结合而设计。响应面法 (RSM) 用于研究三个独立成分（粉体质量比、氧化钠含量和水粘合剂比）的影响以及它们对四个响应变量（流动性、7 d 干缩比）的相互作用、7 d 抗压强度和 28 d 抗压强度）的 GPGM。此外，三种添加剂，包括减水剂，使用正交试验设计方法 (OTDM) 设计 GPGM 的预期响应时，考虑了减缩外加剂和聚合物乳胶。最后，建立了微观检测实验，以比较掺加和不掺加添加剂的 GPGM 的微观特性。结果表明，通过RSM和OTDM可以得到GPGM的最佳混合比例。微观性能测试和分析可以很好地解释GPGM内部成分的机制。