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Engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application

The primary objective of hydraulic barriers in containment facilities is to prevent migration of leachate directly into the underlying subsurface during both the active disposal period and the post-closure period. Liner system is, therefore, one of the most important elements of a modern sanitary la...

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Main Authors: Yamusa, Y. B., Alias, N., Ahmad, K., Sa’Ari, R., Osinubi, K. J., Adrian, E. O., Moses, G.
Format: Article
Published: Taylor's University 2020
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/id/eprint/86904/
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spelling my.utm.869042020-10-22T04:13:21Z http://eprints.utm.my/id/eprint/86904/ Engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application Yamusa, Y. B. Alias, N. Ahmad, K. Sa’Ari, R. Osinubi, K. J. Adrian, E. O. Moses, G. TA Engineering (General). Civil engineering (General) The primary objective of hydraulic barriers in containment facilities is to prevent migration of leachate directly into the underlying subsurface during both the active disposal period and the post-closure period. Liner system is, therefore, one of the most important elements of a modern sanitary landfill. In order to achieve an effective soil lining system, a minimum criterion of 30% fines content is required to fulfil the hydraulic conductivity requirement of ≤ 1 × 10-9 m/s as specified by most regulatory agencies and researchers. Studies reveal that at this percentage, laterite soils are vulnerable to leachate permeation, which will contaminate the groundwater. Therefore, this research aims to determine the effects of gradation on engineering properties of laterite soil with respect to hydraulic conductivity, volumetric shrinkage strain, and unconfined compressive strength. In order to satisfy the regulatory requirements of soil liner, tests were carried out on natural soil (30% fines) and two reconstituted soil samples (40% fines and 50% fines). The effects of fines content that is required to provide the recommended criteria of ≤ 1 × 10-9 m/s hydraulic conductivity, ≤ 4% volumetric shrinkage and ≥ 200 kN/m2 unconfined compressive strength at their permissible limits were plotted. The overall acceptable zone was obtained at moulding water contents ranged between 24-28% for 50% fines content. Based on the laboratory experimental results, a minimum fines content of 50% must be achieved to fulfil the engineering characteristics requirements to prevent groundwater contamination in tropical laterite soil. Taylor's University 2020 Article PeerReviewed Yamusa, Y. B. and Alias, N. and Ahmad, K. and Sa’Ari, R. and Osinubi, K. J. and Adrian, E. O. and Moses, G. (2020) Engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application. Journal of Engineering Science and Technology, 15 (1). pp. 508-523. ISSN 1823-4690
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Yamusa, Y. B.
Alias, N.
Ahmad, K.
Sa’Ari, R.
Osinubi, K. J.
Adrian, E. O.
Moses, G.
Engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application
description The primary objective of hydraulic barriers in containment facilities is to prevent migration of leachate directly into the underlying subsurface during both the active disposal period and the post-closure period. Liner system is, therefore, one of the most important elements of a modern sanitary landfill. In order to achieve an effective soil lining system, a minimum criterion of 30% fines content is required to fulfil the hydraulic conductivity requirement of ≤ 1 × 10-9 m/s as specified by most regulatory agencies and researchers. Studies reveal that at this percentage, laterite soils are vulnerable to leachate permeation, which will contaminate the groundwater. Therefore, this research aims to determine the effects of gradation on engineering properties of laterite soil with respect to hydraulic conductivity, volumetric shrinkage strain, and unconfined compressive strength. In order to satisfy the regulatory requirements of soil liner, tests were carried out on natural soil (30% fines) and two reconstituted soil samples (40% fines and 50% fines). The effects of fines content that is required to provide the recommended criteria of ≤ 1 × 10-9 m/s hydraulic conductivity, ≤ 4% volumetric shrinkage and ≥ 200 kN/m2 unconfined compressive strength at their permissible limits were plotted. The overall acceptable zone was obtained at moulding water contents ranged between 24-28% for 50% fines content. Based on the laboratory experimental results, a minimum fines content of 50% must be achieved to fulfil the engineering characteristics requirements to prevent groundwater contamination in tropical laterite soil.
format Article
author Yamusa, Y. B.
Alias, N.
Ahmad, K.
Sa’Ari, R.
Osinubi, K. J.
Adrian, E. O.
Moses, G.
author_facet Yamusa, Y. B.
Alias, N.
Ahmad, K.
Sa’Ari, R.
Osinubi, K. J.
Adrian, E. O.
Moses, G.
author_sort Yamusa, Y. B.
title Engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application
title_short Engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application
title_full Engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application
title_fullStr Engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application
title_full_unstemmed Engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application
title_sort engineering characteristics of compacted laterite soil as hydraulic barrier in waste containment application
publisher Taylor's University
publishDate 2020
url http://eprints.utm.my/id/eprint/86904/
_version_ 1681489490232737792
score 13.211869

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