The Theoretical Model for the Crystalline Swelling of Montmorillonite
Compacted expansive soils are attracting attention as back-filling (buffer) materials for high-level nuclear waste repositories. The crystalline swelling of the montmorillonite mineral particle is the key factor for the swelling of expansive soils. The crystalline swelling model is proposed in this paper, which comprises four types of repulsive forces, i.e. hydration force of cations, hydration force of layer surface, electrostatic repulsive force between two layers, osmotic force, and two types of attractive forces, i.e. electrostatic attractive force between cations and clay layers and Van Der Waals’ Force. Several factors affecting the crystalline swelling, such as surface charge density, solution concentrations and the location of the charge in the clay layers are considered to examine the new model. The examinations show that the theoretical results agree with the experimental data.
Jing-chao JIA Qing YANG Zhi-quan HUANG
School of Resources and Environment, North China University of Water Resources and Electric Power, Z School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, China
国际会议
The Fifth International Conference on Waste Management and Technology(第五届固体废物管理与技术国际会议)
北京
英文
146-150
2010-11-01（万方平台首次上网日期，不代表论文的发表时间）