A New Method for Estimating the Moisture Content and Flexibility of Polymerised Bentonite Clay Mat

Article


Loh, E.W.K., Wijeyesekera, D.Chitral and Ciupala, A. 2017. A New Method for Estimating the Moisture Content and Flexibility of Polymerised Bentonite Clay Mat. Journal of Engineering Science and Technology. 12 (4), pp. 948-957.
AuthorsLoh, E.W.K., Wijeyesekera, D.Chitral and Ciupala, A.
Abstract

This paper presents a scientific development to address the current absence of a convenient technique to identify the ductile to brittle transition of bentonite clay mats. The instrumented indentation and 3-point bending tests were performed on different liquid polymer hydrated bentonite clay mats at varying moisture content. Properties measured include modified Brinell Hardness Number (BHN) and elastic structural stiffness (EI). The dependence of flexural stiffness on moisture content is demonstrated to conform to a best power function variation. The ductile to brittle transition of clay mat is affected primarily by the change in the moisture content and for the clay mat to remain flexible, critical moisture content of 1.7 times of its plastic limit is required. Results also indicate that a strong correlation between indentation hardness and the structural stiffness. The subsequent outcome in the development of a portable quality control device to monitor the acceptable moisture content level to ensure flexibility of the clay mats was also described in this paper.

KeywordsClay mats; Indentation hardness; Flexural stiffness; Moisture content; Bentonite
JournalJournal of Engineering Science and Technology
Journal citation12 (4), pp. 948-957
ISSN1823-4690
Year2017
PublisherTaylor's University
Accepted author manuscript
License
Web address (URL)http://jestec.taylors.edu.my/V12Issue4.htm
Publication dates
PrintApr 2017
Publication process dates
Deposited29 Jul 2016
Accepted12 Feb 2016
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https://repository.uel.ac.uk/item/84w84

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