摘要
利用电石渣建设土质覆盖层实现以“废”治“废”,具有重要的工程应用价值。为探究改性电石渣作为覆盖层材料的可行性,利用变水头渗透试验装置与气体扩散渗透系数联合测定仪,分别测量了电石渣混合一定质量膨润土试样的饱和渗透系数、气体扩散与渗透系数。结果表明,随膨润土掺量从5%增加到15%(质量分数),试样的饱和渗透系数逐渐变小,当膨润土掺量≥10%时,饱和渗透系数小于1×10^(-9)m·s^(-1),符合规范要求的覆盖层防渗层要求;在膨润土掺量为10%时,试样的气体与扩散渗透系数随饱和度增加显著降低,在保证饱和度>85%时,试样有良好闭气性能。
Using the calcium carbide slag to construct soil overburden to realize waste treatment has important engineering ap-plication value.To explore the feasibility of modified calcium carbide slag as a covering material,the saturated permeability co-efficient,gas diffusion coefficient and permeability coefficient of bentonite samples mixed with calcium carbide slag of a certain mass were measured by a variable head permeability test device combined with a gas diffusion permeability coefficient tester.The results showed that as the bentonite content increased from 5%to 15%(mass fraction),The saturated permeability coeffi-cient of the sample decreases gradually.When the bentonite content is more than 1o%,the saturated permeability coefficient is less than 1×10^(-9)m·s^(-1),which meets the requirements of the impermeable layer of the covering layer.When the bentonite con-tent is 10%,the gas and diffusion permeability coefficients of the sample decrease significantly with the increase of saturation.When the saturation is more than 85%,the sample has good gas retention performance.
作者
卞晓冉
黄书福
BIAN Xiaoran;HUANG Shufu(Quanzhou Huada Environmental Protection Institute Co.Ltd.,Quanzhou 362000;Fujian Dongtian pumped storage Co.Ltd.,Nanan 362300)
出处
《土工基础》
2025年第1期127-130,共4页
Soil Engineering and Foundation
关键词
电石渣
覆盖层
饱和渗透系数
气体扩散系数
气体渗透系数
Carbide Slag
Soil Cover
Saturation Permeability Coefficient
Gas diffusion coefficient
Gas permeability Coeffi-cient
