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对两种高庙子钠基膨润土(简称GMZ001和GMZ07)在不同初始干密度下进行膨胀力试验、常压力下的膨胀变形试验以及压缩试验。试验结果表明,GMZ001的膨胀能力要比GMZ07的大,并且GMZ001比GMZ07更难压实。对饱和后两种膨润土进行压汞试验和扫描电子显微镜测试后发现,在相同孔隙比下,GMZ07集聚体间孔隙较多,并且GMZ001集聚体的水化程度大于GMZ07。结合土工和微观试验的结果,认为导致两者力学性能差异的主要原因是由于颗粒粒径大小的差异以及蒙脱石含量的不同。最后利用蒙脱石孔隙比的概念对两种膨润土的浸水膨胀试验结果进行归一化,并对膨润土的膨胀特性进行了预测。
Two Kaozienzi sodium-based bentonites (GMZ001 and GMZ07 for short) were tested for swelling force at different initial dry densities, deformation under normal pressure, and compression tests. The test results show that GMZ001 has a larger swelling capacity than GMZ07 and GMZ001 is more difficult to compaction than GMZ07. After the two bentonites were saturated by mercury intrusion test and scanning electron microscopy, it was found that at the same void ratio, there were more pores in GMZ07 aggregates and GMZ001 aggregates were more hydrated than GMZ07. According to the results of geotechnical and microscopic tests, it is considered that the main reason that causes the difference of mechanical properties between the two is due to the difference of particle size and the content of montmorillonite. Finally, the concept of montmorillonite void ratio was used to normalize the swelling and swelling test of two bentonites, and the swelling properties of bentonite were predicted.