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本文介绍了我国中南地区常见的一种以含伊利石为主的、具有中等偏高膨胀性的粘土的基本特性和用这种土在室内制备不同压实含水量和容重的试样置于固结仪中进行试验,以测定其受荷膨胀和膨胀压力的成果。经研究认为:为了控制压实的膨胀粘土的膨胀势,必须兼顾填筑容重和填筑含水量,即前者要比按标准击实方法求得的容重低一些,而后者则要较高于标准最优值,以保证不致发生较大的膨胀。文中还讨论了压实的膨胀粘土结构对膨胀性的影响。
This paper describes the basic characteristics of a medium-highly expansive clay that is dominated by illite and is commonly found in the central and southern regions of China. Samples with different densities of compacted water and bulk densities in the room are placed on solids. The test was performed in a junction meter to determine the effect of the loaded expansion and expansion pressure. According to the study, in order to control the swelling potential of compacted expansive clays, it is necessary to take into consideration the volumetric capacity of building and the amount of water to be filled. That is, the former should be lower than the one measured by the standard compaction method, and the latter should be higher than the standard. The optimum value is to ensure that no large expansion will occur. The effect of compacted expanded clay structure on the expansibility is also discussed.