摘要
在已有膨润土微观结构研究的基础上,假设其中蒙脱石的膨胀完全填充土中孔隙,得到蒙脱石膨胀体积应变εsv的表达式.根据εsv计算出水化后蒙脱石矿物层距离的一半和基于Gouy-Chapman理论的扩散双电层的厚度,并对二者进行了比较.在给定的计算参数下,当饱和含水量为80%～90%时,膨润土的孔隙完全由结合水填充。
Under the assumption that pore spaces of bentonite were completely filled by swelling of montmorillonite, an expression of swelling volumetric strain of montmorillonite εsv was obtained based on the former research of microstructure of bentonite. With εsv, the half distance between two layers of montmorillonite after hydration and the thickness of diffuse double layer based on Gouy-Chapman theory were calculated and compared. It is concluded that, with the computation parameters given, pore spaces of bentonite are completely filled by bound water when the water content is within the range of 80%-90%.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2006年第3期299-301,共3页
Journal of Hohai University(Natural Sciences)
关键词
膨润土
膨胀
蒙脱石膨胀体积应变
扩散双电层
bentonite
swelling
swelling volumetric strain of montmorillonite
diffuse double layer
