Assessment of the clogging potential of two clays

Clogging sometimes occurs in tunnelling projects. Soils containing high plasticity clay minerals have a high potential for clogging. To gain a better understanding of the effect of swelling clay on the clogging potential, two different clays, bentonite and kaolin, were tested in different proportion...

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Main Authors: Kang, Chao, Wu, Yichen, Yi, Yaolin, Bayat, Alireza
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/143635
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1436352021-01-28T07:48:23Z Assessment of the clogging potential of two clays Kang, Chao Wu, Yichen Yi, Yaolin Bayat, Alireza School of Civil and Environmental Engineering Engineering::Civil engineering Montmorillonite Kaolinite Clogging sometimes occurs in tunnelling projects. Soils containing high plasticity clay minerals have a high potential for clogging. To gain a better understanding of the effect of swelling clay on the clogging potential, two different clays, bentonite and kaolin, were tested in different proportions. Several approaches were employed to evaluate clogging potential, including a semi-empirical diagram, laboratory-based drilling tests, and evaluation of the variation of the plasticity indexes. The performance of an additive was also evaluated using the same method as for pure mixtures. To determine the correlation between the mechanical properties and clogging potential of the mixtures, vane shear tests were carried out on the mixtures containing the additive. The results revealed that mixtures with bentonite had a higher clogging potential than pure kaolin. The performance of additives used for mitigation of clogging also changed with the content of bentonite in the mixtures. The simple drilling tests were capable of quantitatively differentiating the clogging potential of plain mixtures and evaluating the performance of additives. Accepted version The authors would like to thank MSc students Nero Gao and Sai Deng for their assistance with the laboratory tests. The authors are also grateful to Delaina Lawson, Lindsey Gauthier and Lana Gutwin from CETT for their assistance in the preparation and review of this manuscript. 2020-09-15T04:01:45Z 2020-09-15T04:01:45Z 2019 Journal Article Kang, C., Wu, Y., Yi, Y., & Bayat, A. (2019). Assessment of the clogging potential of two clays. Applied Clay Science, 178, 105134-. doi:10.1016/j.clay.2019.105134 0169-1317 https://hdl.handle.net/10356/143635 10.1016/j.clay.2019.105134 178 en Applied Clay Science © 2019 Elsevier B.V. All rights reserved. This paper was published in Applied Clay Science and is made available with permission of Elsevier B.V. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
Montmorillonite
Kaolinite
spellingShingle Engineering::Civil engineering
Montmorillonite
Kaolinite
Kang, Chao
Wu, Yichen
Yi, Yaolin
Bayat, Alireza
Assessment of the clogging potential of two clays
description Clogging sometimes occurs in tunnelling projects. Soils containing high plasticity clay minerals have a high potential for clogging. To gain a better understanding of the effect of swelling clay on the clogging potential, two different clays, bentonite and kaolin, were tested in different proportions. Several approaches were employed to evaluate clogging potential, including a semi-empirical diagram, laboratory-based drilling tests, and evaluation of the variation of the plasticity indexes. The performance of an additive was also evaluated using the same method as for pure mixtures. To determine the correlation between the mechanical properties and clogging potential of the mixtures, vane shear tests were carried out on the mixtures containing the additive. The results revealed that mixtures with bentonite had a higher clogging potential than pure kaolin. The performance of additives used for mitigation of clogging also changed with the content of bentonite in the mixtures. The simple drilling tests were capable of quantitatively differentiating the clogging potential of plain mixtures and evaluating the performance of additives.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Kang, Chao
Wu, Yichen
Yi, Yaolin
Bayat, Alireza
format Article
author Kang, Chao
Wu, Yichen
Yi, Yaolin
Bayat, Alireza
author_sort Kang, Chao
title Assessment of the clogging potential of two clays
title_short Assessment of the clogging potential of two clays
title_full Assessment of the clogging potential of two clays
title_fullStr Assessment of the clogging potential of two clays
title_full_unstemmed Assessment of the clogging potential of two clays
title_sort assessment of the clogging potential of two clays
publishDate 2020
url https://hdl.handle.net/10356/143635
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