Effects of water salinity and content on particle size distribution and soil strength

作     者：PENG Chang-sheng LOWG Kathleen ZHANG Qian 

作者机构：College of Environmental Science and Engineering Ocean University of China Qingdao 266100 China Instituto de Metalurgia Universidad Autonoma de San Luis Potosi San Luis Potosi 78210 Mexico Department of Civil and Environmental Engineering University of California Berkeley San Jose 95132 USA 

出 版 物：《Journal of Environmental Science and Engineering》 (环境科学与工程（英文版）)

年 卷 期：2009年第3卷第1期

页      面：24-28页

学科分类：090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：Acknowledgements: This work was supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars  SEM  China  and also supported by the United States National Science Foundation. The authors thank Prof. SHEN H. H. and Prof. SHEN H. T. from Clarkson University for their unconditional support to this work 

主　　题：water salinity water content particle size distribution soil strength hydration film 

摘      要：The effect of NaCl on soil strength was investigated in this project based on salinity concentrations of 0 g/L, 5 g/L, 20 g/L, and 50 g/L as well as varying water contents of 15%-20%. Laser particle size analyzer was also performed to explain possible effects. From particle size analysis and strength tests, it is hypothesized that the strength of the soil is increased with the addition of certain salinity concentrations until there are reversed effects, which is between 20 g/L and 50 g/L from our study. The increase of strength is suggested to be the affect of a greater variety of particle sizes. Since NaCI plays a role in the particle size distribution, it also plays a role in the strength of soils. The degree of the effect of the water content also differs from concentrations, and could be due to the variation of hydration film thickness on particles, which is affected by the ions introduced from water.