Influence of cementation reagent concentration on microbial-induced calcite precipitation in Malaysia

With the high population growth rate, land with competent soil which can use for the construction purposes decreased. As the competent soil availability decreased, many soil improvement methods are used to improve the soil in term of strength and stability. One of the new sustainable methods, known...

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Main Author:	Lee, Cheng Yee
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/85900/1/LeeChengYeeMFKA2017.pdf
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spelling	my-utm-ep.859002020-07-30T07:38:32Z Influence of cementation reagent concentration on microbial-induced calcite precipitation in Malaysia 2017 Lee, Cheng Yee TA Engineering (General). Civil engineering (General) With the high population growth rate, land with competent soil which can use for the construction purposes decreased. As the competent soil availability decreased, many soil improvement methods are used to improve the soil in term of strength and stability. One of the new sustainable methods, known as Microbial-Induced Calcite Precipitation (MICP), which utilizes the biological process to produce calcite in soil which can induce the biocementation and bioclogging process. These processes will improve the properties of soil in term of permeability, strength, and liquefaction resistance. The efficiency of MICP might be influenced by several factors such as type of sand, reaction time, reactant concentration, and bacteria concentration. In this research, two of the factors, concentration of cementation reagents and treatment durations, were being studied by using 2 different mixing methods (spraying method and pressurize method). The bacterial concentration used is 1.6 x 106 cfu/ml and the atmospheric temperature used is 30°c. The optimum cementation reagent concentration found to be 0.25 M with spraying method under the treatment duration of 24 hours which increase the soil strength up to 215.79 % (from 19 kPa to 41 kPa). For pressurize method, the best concentration of cementation reagent is 0.25 M under treatment duration of 48 hours which gave a soil strength improvement of 184.21 % (from 19 kPa to 35 kPa). Hence, with the cementation reagent of 0.25 M, spraying method is more effective than pressurize method. 2017 Thesis http://eprints.utm.my/id/eprint/85900/ http://eprints.utm.my/id/eprint/85900/1/LeeChengYeeMFKA2017.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:132381 masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Civil Engineering Faculty of Engineering - School of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Lee, Cheng Yee Influence of cementation reagent concentration on microbial-induced calcite precipitation in Malaysia
description	With the high population growth rate, land with competent soil which can use for the construction purposes decreased. As the competent soil availability decreased, many soil improvement methods are used to improve the soil in term of strength and stability. One of the new sustainable methods, known as Microbial-Induced Calcite Precipitation (MICP), which utilizes the biological process to produce calcite in soil which can induce the biocementation and bioclogging process. These processes will improve the properties of soil in term of permeability, strength, and liquefaction resistance. The efficiency of MICP might be influenced by several factors such as type of sand, reaction time, reactant concentration, and bacteria concentration. In this research, two of the factors, concentration of cementation reagents and treatment durations, were being studied by using 2 different mixing methods (spraying method and pressurize method). The bacterial concentration used is 1.6 x 106 cfu/ml and the atmospheric temperature used is 30°c. The optimum cementation reagent concentration found to be 0.25 M with spraying method under the treatment duration of 24 hours which increase the soil strength up to 215.79 % (from 19 kPa to 41 kPa). For pressurize method, the best concentration of cementation reagent is 0.25 M under treatment duration of 48 hours which gave a soil strength improvement of 184.21 % (from 19 kPa to 35 kPa). Hence, with the cementation reagent of 0.25 M, spraying method is more effective than pressurize method.
format	Thesis
qualification_level	Master's degree
author	Lee, Cheng Yee
author_facet	Lee, Cheng Yee
author_sort	Lee, Cheng Yee
title	Influence of cementation reagent concentration on microbial-induced calcite precipitation in Malaysia
title_short	Influence of cementation reagent concentration on microbial-induced calcite precipitation in Malaysia
title_full	Influence of cementation reagent concentration on microbial-induced calcite precipitation in Malaysia
title_fullStr	Influence of cementation reagent concentration on microbial-induced calcite precipitation in Malaysia
title_full_unstemmed	Influence of cementation reagent concentration on microbial-induced calcite precipitation in Malaysia
title_sort	influence of cementation reagent concentration on microbial-induced calcite precipitation in malaysia
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Civil Engineering
granting_department	Faculty of Engineering - School of Civil Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/85900/1/LeeChengYeeMFKA2017.pdf
_version_	1747818471645773824

Influence of cementation reagent concentration on microbial-induced calcite precipitation in Malaysia

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