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Investigation of unconfined compressive strength for biopolymer treated clay
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Cheng, Zhanbo and Geng, Xueyu (2023) Investigation of unconfined compressive strength for biopolymer treated clay. Construction and Building Materials, 385 . 131458. doi:10.1016/j.conbuildmat.2023.131458 ISSN 0950-0618.
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Official URL: https://doi.org/10.1016/j.conbuildmat.2023.131458
Abstract
In this study, six typical biopolymers (xanthan gum (XG), sodium alginate (SA), kappa gum (KG), locust bean gum (LBG), agar gum (AG) and gellan gum (GE)) are selected to investigate the mechanical strength of biopolymer treated clay with the consideration of different hydrated conditions, biopolymer concentration, curing time, wetting–drying, the combination of two different types of biopolymers and biopolymer-soil mixing method. From the results, it can be seen, under the same conditions, out of the six different biopolymers, SA-treated clay provided the highest unconfined compressive strength (UCS) (3.58–4.5 times of untreated clay). Moreover, an optimum reinforcement performance was found when biopolymer concentration was within the range of 1–2% with a curing time between 28 and 42 days. Furthermore, despite biopolymers being eco-friendly materials, with great potential under the biodegradation process, current research results demonstrated that XG treated clay can maintain UCS even after curing 378 days and undertaking 3 cycles of wetting–drying processes. In addition, the maximum UCS of XG combined KG treated soil can be observed in the ratio of 1:1. Hot-water dry mixing method can be adopted to obtain uniform XG, SA or KG-clay mixture further improving the soil strength, while AG, GE and LBG treated clay has a better strengthening efficiency by using hot-water wet mixing method.
Item Type: | Journal Article | |||||||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | |||||||||
Library of Congress Subject Headings (LCSH): | Biopolymers -- Mechanical properties, Soil stabilization, Reinforced soils, Clay soils, Clay soils -- Compression testing | |||||||||
Journal or Publication Title: | Construction and Building Materials | |||||||||
Publisher: | Elsevier | |||||||||
ISSN: | 0950-0618 | |||||||||
Official Date: | 3 July 2023 | |||||||||
Dates: |
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Volume: | 385 | |||||||||
Article Number: | 131458 | |||||||||
DOI: | 10.1016/j.conbuildmat.2023.131458 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||
Date of first compliant deposit: | 14 July 2023 | |||||||||
Date of first compliant Open Access: | 14 July 2023 | |||||||||
RIOXX Funder/Project Grant: |
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