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...

Full description

Saved in:
Bibliographic Details
Main Author: Tang, Bee Lin
Format: Thesis
Language:English
English
English
Published: 2011
Subjects:
Online Access: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
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-uthm-ep.2866
record_format uketd_dc
spelling my-uthm-ep.28662021-11-02T00:41:37Z Revitalisation of organic and peat soils 2011-09 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 http://eprints.uthm.edu.my/2866/ http://eprints.uthm.edu.my/2866/1/24p%20TANG%20BEE%20LIN.pdf text en public http://eprints.uthm.edu.my/2866/2/TANG%20BEE%20LIN%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/2866/3/TANG%20BEE%20LIN%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Awam dan Alam Bina
institution Universiti Tun Hussein Onn Malaysia
collection UTHM Institutional Repository
language English
English
English
topic TA Engineering (General)
Civil engineering (General)
TA Engineering (General)
Civil engineering (General)
spellingShingle TA Engineering (General)
Civil engineering (General)
TA Engineering (General)
Civil engineering (General)
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
qualification_name Master of Philosophy (M.Phil.)
qualification_level Master's degree
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
granting_institution Universiti Tun Hussein Onn Malaysia
granting_department Fakulti Kejuruteraan Awam dan Alam Bina
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
_version_ 1747830996359708672