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采用无侧限抗压强度、电镜扫描(SEM)和压汞(MIP)等试验方法,分析研究了地聚合物—偏高岭土(metakaolin)对水泥土的力学强度的影响规律,探讨了其改善水泥土强度的机理,并根据现场测试验证了实用性和经济性。试验结果表明:地聚合物掺入水泥土后,水泥土的无侧限抗压强度得到了大幅度的提高,然而强度与地聚合物掺量之间并非单一线性增加关系,而是由活性区域和惰性区域组成,转折点对应的MK掺量为3%;微观试验结果表明地聚合物掺入能产生更多的胶结物,使水泥土结构更加致密;基于试验数据给出了地聚合物掺量与水泥土强度增长的评价公式。现场测试结果和工程造价分析均表明了地聚合物具有较大的工程实用性。
The influences of geopolymer-metakaolin on the mechanical strength of cemented soil were analyzed by using unconfined compressive strength, SEM and mercury intrusion porosimetry (MIP) The mechanism of soil strength, and according to the field test to verify the practicality and economy. The experimental results show that the unconfined compressive strength of cement-soil increases with the incorporation of geopolymer into cement soil, however, the strength is not increased linearly with the content of geopolymer. And inert region. The amount of MK corresponding to the turning point is 3%. The microscopic results show that the incorporation of geopolymer can produce more cement and make the structure of cement soil more dense. Based on the experimental data, the content of geopolymer And cement soil strength growth evaluation formula. Field test results and project cost analysis showed that geopolymer has a greater engineering practicability.