不饱和膨润土中气体渗透研究

Study on gas permeability of the unsaturated bentonites

作者对不饱和膨润土中气体渗透情况进行了研究 ,对实验所使用的膨润土和砂进行了密度、容重、粒度、孔隙度及含水率等特性的表征。实验所建立的气体渗透研究装置可用于测定气体渗透系数 ,并将其作为材料气体渗透性能的表征。实验结果表明 :膨润土的孔隙度和含水率对其渗透系数有十分显著的影响。

Gas permeability of the bentonites under different conditions was studied. The bentonites and sands were characterized by microscopic shape, density, bulk density, size distribution, porosity and water content. A setting was constructed for gas permeability of bentonites and sands, and the coefficient of permeability was determined. The results indicate that the porosity and water content of bentonites have a remarkable influence on their permeability.