NDLI: Application of biopolymer hydrogel for ground hydraulic conductivity control under pressurized conditions

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Application of biopolymer hydrogel for ground hydraulic conductivity control under pressurized conditions

Content Provider	Scilit
Author	Chang, I. Cho, G-C. Tran, A. T. P.
Copyright Year	2021
Description	The use of hydraulic barriers to control the water leakage and flow into underground structures such as tunnels has become a common method in geotechnical engineering practice. There are different types of materials used for hydraulic conductivity control purposes such as soil-bentonite and cement-bentonite mixtures, and chemical admixtures including asphalt, sodium silicate and so on. Underground hydraulic barrier materials are required to well-resist against the in-situ earth pressure and hydrostatic water pressure. In this study, a gel–type polysaccharide biopolymer gellan gum–has been used to reduce the hydraulic conductivity of sand. It results from the fact that gellan gum biopolymer forms high viscous hydrogel once thermo-gelated, which is expected to have a high structural resistance even at high external pressure conditions. Therefore, the hydraulic conductivity of gellan gum-treated sand is assessed with vertical confinement and water pressure increase. It is interesting to observe that the hydraulic conductivity of sand exponentially decreases with gellan gum content. Book Name: Geotechnical Aspects of Underground Construction in Soft Ground
Related Links	https://api.taylorfrancis.com/content/chapters/edit/download?identifierName=doi&identifierValue=10.1201/9780429321559-100&type=chapterpdf
Ending Page	764
Page Count	4
Starting Page	761
DOI	10.1201/9780429321559-100
Language	English
Publisher	Informa UK Limited
Publisher Date	2021-05-10
Access Restriction	Open
Subject Keyword	Book Name: Geotechnical Aspects of Underground Construction in Soft Ground Geological Engineering Structural Hydraulic Conductivity Sodium Hydrogel Biopolymer Pressure Conditions Bentonite Gellan
Content Type	Text
Resource Type	Chapter

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