论分散性黏土与鉴定方法

Discussion on Dispersive Soil and Methods of Identification

鉴定分散性黏土的方法有许多种,但是现在较为通用的仍是美国工程师谢拉德提出的四种建议鉴定方法,即双比重计法、针孔试验、碎块试验和孔隙水可溶盐试验,四种方法各有特点,但有一定的局限性。本文评述了四种鉴定方法的特点与局限性,认为分散性鉴定方法和判别标准应当改进和完善;并认为应当分析土的物理化学性质和矿物成分等,来进一步了解土的分散性能。

There are many methods of identification of the dispersive soil, but double-hydrometer test, pinhole test, crumb test and pore water salts test are always used to identify the dispersive clay, which were recommended by J.L.Sherard. Every of the four tests has both specialisties and limitations.This article discusses the specialisties and limitations of four tests and believes that these methods and criteria should be improved. To further understand the soil dispersions, analyses of the physical and chemical characters and mineral composition are necessary.