Swelling Capacity and Hydraulic Conductivity of Polymer-Modified Bentonite under Saline Water Conditions SCIE SCOPUS

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Title
Swelling Capacity and Hydraulic Conductivity of Polymer-Modified Bentonite under Saline Water Conditions
Author(s)
Xu, Xin; Liu, Xiaofeng; Oh, Myounghak; Park, Junboum
KIOST Author(s)
Oh, Myounghak(오명학)
Publication Year
2018-07
Abstract
Bentonite is widely used as a waterproof material in civil engineering. The swelling capacity and impermeability will be reduced in saline water conditions. A polymer-modified bentonite was used in this study, and the swelling characteristic and hydraulic conductivity in saline water were investigated. Results show that: the modified bentonite (MB) has good swelling characteristics and low permeability in saline water conditions; the unload swelling strain of MB in saline water conditions increased with rising swelling time; the final unload swelling strain of MB decreased with the increase of vertical pressure and increased with increasing initial dry density; and, as the swelling time increased, the swelling pressure increased rapidly at first and then decreased. Based on experimental results, this study obtained a linear relationship between the ratio of time to unload swelling strain and swelling time, a formula for load swelling strain that was related to initial dry density and vertical pressure, a linear relationship between the ratio of time to swelling pressure and swelling time, and an exponential relationship between swelling pressure and initial dry density. The MB can be used as a waterproof material in seepage-prone applications under saline environmental conditions in civil engineering works.
ISSN
2076-3417
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/867
DOI
10.3390/app8071025
Bibliographic Citation
APPLIED SCIENCES-BASEL, v.8, no.7, 2018
Publisher
MDPI
Subject
INORGANIC SALT-SOLUTIONS; COMPACTED BENTONITE; MOLECULAR-DYNAMICS; DRY DENSITY; BEHAVIOR; PRESSURES; MIXTURES; CLAY; PERFORMANCE; SEAWATER
Keywords
bentonite; polymer; saline water; swelling capacity; hydraulic conductivity
Type
Article
Language
English
Document Type
Article
Publisher
MDPI
Related Researcher
Research Interests

Marine geotechnics,Geoenvironmental Engineering,offshore foundation,해양지반공학,지반환경공학,해양구조물 기초

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