王宝 Likes:

Affiliation of Author(s):

环境与市政工程学院

Journal:

土木建筑与环境工程

Key Words:

中文关键字：土工合成粘土衬垫;膨润土;自由膨胀量;液限;渗透系数，英文关键字：geosynthetic clay liner (GCL);bentonite;free swell

Abstract:

Abstract：In order to evaluate the feasibility of use the free swell index and liquid limits as an indicator of hydraulic conductivity of the GCL, in this paper, two index properties (free swell index and liquid limits) of a bentonite and the hydraulic conductivity of the same GCL were measured with different concentrations of heavy metals. The results of this test show that, when the concentrations of heavy metals ranges from 0.01mol/L to 0.1mol/L, the free swell index and liquid limits deceases with increasing in concentrations of heavy metals. However, further increasing the heavy metals concentration can’t cause the two index properties decrease continually. Permeation with 0.01mol/L heavy metals solution didn’t change the hydraulic conductivity of GCL. By contrast, when the concentration of heavy metals increases up to 0.02mol/L, the hydraulic conductivity of the GCL increased by 1 to 2 orders of magnitude relative to the value obtained based on permeation with water. Results of this study show that the index properties of a bentonite have good relationships with the hydraulic conductivity of a GCL when the concentration of heavy metals in solutions beyond 0.02mol/L and they can be used to estimate the hydraulic conductivity.

Note:

王宝

Co-author:

董兴玲

First Author:

wangbao

Indexed by:

Journal paper

Volume:

卷：35

Issue:

期：5

Page Number:

页：66-71

Translation or Not:

no

Date of Publication:

2015-10-01