Revitalisation of organic and peat soils

Ground improvement projects are often necessary and site – specific to ensure project success. The author hypothesizes that problematic soil, which are often mass replaced can be revitalised with modest proportions (<10%) of Ordinary Portland Cement as a binder to make a positive contributi...

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Main Author: Tang, Bee Lin
Format: Thesis
Language:English
English
English
Published: 2011
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Online Access:http://eprints.uthm.edu.my/2866/1/24p%20TANG%20BEE%20LIN.pdf
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http://eprints.uthm.edu.my/2866/3/TANG%20BEE%20LIN%20WATERMARK.pdf
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spelling my.uthm.eprints.28662021-11-02T00:41:37Z http://eprints.uthm.edu.my/2866/ Revitalisation of organic and peat soils Tang, Bee Lin TA Engineering (General). Civil engineering (General) TA703-712 Engineering geology. Rock mechanics. Soil mechanics. Ground improvement projects are often necessary and site – specific to ensure project success. The author hypothesizes that problematic soil, which are often mass replaced can be revitalised with modest proportions (<10%) of Ordinary Portland Cement as a binder to make a positive contribution to economic, green engineering, and resource sustainability. Deep cement mixing (DCM) techniques have proved to be successful worldwide and use large proportions (circa 200%) of cement, lime and/or fly ash in dry or wet mixing to form in-situ piles with enhanced strength and stiffness in comparatively short time. Revitalisation of organic and peat soils is not a practice currently adopted in Malaysia which has a distribution of over 1.5 million ha of such challenging soils. Such soils have high water and organic content and their mechanical chemical and biological properties degenerate with time. Land shortage for development promotes land reclamation. The shear strength and stiffness behaviour of these heavily organic soils and the revitalised soils is central to this research study. Peat soil from Pontian, Johor and an organic soil from Bukit Rambai, Malacca are investigated with laboratory controlled cement slurry mixing at water cement ratios of 3.5,7,14,140 for peat and 5,10,15 for organic soil. Specimens of these soil mixtures were prepared in polyvinyl chloride tubes (50 mm diameter 300 mm long) and cured at room temperature of 25o C and relative humidity of 50% for 7,14 and 28 days. Unconfined compressive strength, consolidated undrained triaxial, bender element, and one dimensional consolidation tests were done to assess the strength and stiffness improvements of the ‘revitalised soils’. Increases of up to 30% and 16% in unconfined compressive strength and 229% and 0.9% in Go for Pontian Peat and Malacca organic soil respectively are reported in this study. Keywords: cement slurry, organic soils, peat soils, revitalisation, strength, stiffness 2011-09 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/2866/1/24p%20TANG%20BEE%20LIN.pdf text en http://eprints.uthm.edu.my/2866/2/TANG%20BEE%20LIN%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/2866/3/TANG%20BEE%20LIN%20WATERMARK.pdf Tang, Bee Lin (2011) Revitalisation of organic and peat soils. Masters thesis, Universiti Tun Hussein Onn Malaysia.
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
English
English
topic TA Engineering (General). Civil engineering (General)
TA703-712 Engineering geology. Rock mechanics. Soil mechanics.
spellingShingle TA Engineering (General). Civil engineering (General)
TA703-712 Engineering geology. Rock mechanics. Soil mechanics.
Tang, Bee Lin
Revitalisation of organic and peat soils
description Ground improvement projects are often necessary and site – specific to ensure project success. The author hypothesizes that problematic soil, which are often mass replaced can be revitalised with modest proportions (<10%) of Ordinary Portland Cement as a binder to make a positive contribution to economic, green engineering, and resource sustainability. Deep cement mixing (DCM) techniques have proved to be successful worldwide and use large proportions (circa 200%) of cement, lime and/or fly ash in dry or wet mixing to form in-situ piles with enhanced strength and stiffness in comparatively short time. Revitalisation of organic and peat soils is not a practice currently adopted in Malaysia which has a distribution of over 1.5 million ha of such challenging soils. Such soils have high water and organic content and their mechanical chemical and biological properties degenerate with time. Land shortage for development promotes land reclamation. The shear strength and stiffness behaviour of these heavily organic soils and the revitalised soils is central to this research study. Peat soil from Pontian, Johor and an organic soil from Bukit Rambai, Malacca are investigated with laboratory controlled cement slurry mixing at water cement ratios of 3.5,7,14,140 for peat and 5,10,15 for organic soil. Specimens of these soil mixtures were prepared in polyvinyl chloride tubes (50 mm diameter 300 mm long) and cured at room temperature of 25o C and relative humidity of 50% for 7,14 and 28 days. Unconfined compressive strength, consolidated undrained triaxial, bender element, and one dimensional consolidation tests were done to assess the strength and stiffness improvements of the ‘revitalised soils’. Increases of up to 30% and 16% in unconfined compressive strength and 229% and 0.9% in Go for Pontian Peat and Malacca organic soil respectively are reported in this study. Keywords: cement slurry, organic soils, peat soils, revitalisation, strength, stiffness
format Thesis
author Tang, Bee Lin
author_facet Tang, Bee Lin
author_sort Tang, Bee Lin
title Revitalisation of organic and peat soils
title_short Revitalisation of organic and peat soils
title_full Revitalisation of organic and peat soils
title_fullStr Revitalisation of organic and peat soils
title_full_unstemmed Revitalisation of organic and peat soils
title_sort revitalisation of organic and peat soils
publishDate 2011
url http://eprints.uthm.edu.my/2866/1/24p%20TANG%20BEE%20LIN.pdf
http://eprints.uthm.edu.my/2866/2/TANG%20BEE%20LIN%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/2866/3/TANG%20BEE%20LIN%20WATERMARK.pdf
http://eprints.uthm.edu.my/2866/
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score 13.160551