In order to investigate the influence of minerals on the compressibility of clay, the artificial mixtures with different weight proportions of clay minerals (i.e., kaolinite, illite, montmorillonite and chlorite) are prepared. The conventional oedometer tests are carried out on these remolded soil samples. Comparisons among the experimental results indicate that (1) for mixtures of kaolinite and illite, the compression index and rebound index increase with the increase of the content of illite; (2) for mixtures of kaolinite, illite and montmorillonite, they increase with the content of montmorillonite; and (3) for mixtures of kaolinite, illite, montmorillonite and chlorite, they increase with the content of montmorillonite and chlorite, and the montmorillonite has the dominant contribution. Based on the experimental results, two nonlinear equations are proposed for both the compression and rebound indices considering the influence of clay minerals. In addition, it is found that the value of Cc/Cs for all mixtures varies from 6.1 to 9.1.
|Number of pages||6|
|Journal||Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering|
|Publication status||Published - 1 Jan 2013|
- Compression index
- Rebound index
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology