Volume 39 Issue 3
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Yang Xiaoqi, Xu Peiyi, Yang Ting, Wang Changming. Experimental study of Xigeda expanded claystone improved by cement[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(3): 446-453. doi: 10.20265/j.cnki.issn.1007-2993.2024-0106
Citation: Yang Xiaoqi, Xu Peiyi, Yang Ting, Wang Changming. Experimental study of Xigeda expanded claystone improved by cement[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(3): 446-453. doi: 10.20265/j.cnki.issn.1007-2993.2024-0106
shu

Experimental study of Xigeda expanded claystone improved by cement

doi: 10.20265/j.cnki.issn.1007-2993.2024-0106

  • Sichuan Water Development Investigation, Design & Research Co., Ltd., Chengdu 610072, Sichuan, China

  • Received Date: 2024-03-07
  • Accepted Date: 2024-08-29
  • Rev Recd Date: 2024-05-09
  • Publish Date: 2025-06-09
    Abstract
  • Based on the study of Xigeda expanded claystone distributed along the Longtang Reservoir and Irrigation District Project, the basic physical properties test, EDTA titration method, percussion test, scanning electron microscopy, compression test, and straight shear test on modified Xigeda expanded claystone with different cement contents were carried out. The results show that the admixture of cement can effectively improve the engineering properties of Xigeda expanded claystone, and reduce the expansion of expanded claystone, and with the increase of cement content, the mechanical properties of modified claystone have been greatly improved. Microstructural analysis of modified Xigeda expanded claystone revealed that cement makes a large number of rods or flocculent gelling substances distributed between the claystone particles, which are embedded in each other and the expanded claystone particles to form a single whole, thus improving the strength of the connection between the soil particles. Unsaturated and saturated state of cement-modified expanded claystone for shrinkage test and unconfined compressive strength test, it can be seen that the unconfined compressive strength of unsaturated modified soil is significantly higher than the saturated state, and the reasonable admixture content of cement is 8%.

     

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