Biocementation of fine-grained soil

This report presents an experimental study on the effect of Biopolymer (Xanthan gum and Gellan gum) and Microbiologically Induced Calcite Precipitation (MICP) treatment of compacted finegrained soil. The compaction is conducted using static compaction, standard or modified Proctor compaction and the...

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Main Author: Ong, Jun Hao
Other Authors: Chu Jian
Format: Final Year Project
Language:English
Published: 2017
Subjects:
Online Access:http://hdl.handle.net/10356/72956
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-729562023-03-03T16:56:44Z Biocementation of fine-grained soil Ong, Jun Hao Chu Jian School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Geotechnical This report presents an experimental study on the effect of Biopolymer (Xanthan gum and Gellan gum) and Microbiologically Induced Calcite Precipitation (MICP) treatment of compacted finegrained soil. The compaction is conducted using static compaction, standard or modified Proctor compaction and the mechanical strength properties of the biotreated soil were tested with various laboratory tests including: the Triaxial (Unconsolidated Undrained) Test, the Unconfined Compression Test and the California Bearing Ration Test. The purpose for this study is to explore the usage of an environmentally friendly soil improvement method on clayey fill which has multiple applications in civil construction. Xanthan gum treatment to the soil displayed a less compacted density despite having higher UC strength of around 1550 kPa with respect to 800 kPa from the untreated samples. Gellan gum shows little to no improvement in both compaction and UC strength which is likely due to low dosage amount. The MICP treated soil shows a higher dry density after compaction and a higher UC strength of 1300 kPa to 1400 kPa in the dried state as well as compacted state. However, the California Bearing Ratio tests did not show improvement for samples tested immediately after compaction. Further studies are required to understand the mechanisms of the MICP treatment for fine-grained soil. Bachelor of Engineering (Civil) 2017-12-15T04:58:33Z 2017-12-15T04:58:33Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/72956 en Nanyang Technological University 70 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering::Geotechnical
spellingShingle DRNTU::Engineering::Civil engineering::Geotechnical
Ong, Jun Hao
Biocementation of fine-grained soil
description This report presents an experimental study on the effect of Biopolymer (Xanthan gum and Gellan gum) and Microbiologically Induced Calcite Precipitation (MICP) treatment of compacted finegrained soil. The compaction is conducted using static compaction, standard or modified Proctor compaction and the mechanical strength properties of the biotreated soil were tested with various laboratory tests including: the Triaxial (Unconsolidated Undrained) Test, the Unconfined Compression Test and the California Bearing Ration Test. The purpose for this study is to explore the usage of an environmentally friendly soil improvement method on clayey fill which has multiple applications in civil construction. Xanthan gum treatment to the soil displayed a less compacted density despite having higher UC strength of around 1550 kPa with respect to 800 kPa from the untreated samples. Gellan gum shows little to no improvement in both compaction and UC strength which is likely due to low dosage amount. The MICP treated soil shows a higher dry density after compaction and a higher UC strength of 1300 kPa to 1400 kPa in the dried state as well as compacted state. However, the California Bearing Ratio tests did not show improvement for samples tested immediately after compaction. Further studies are required to understand the mechanisms of the MICP treatment for fine-grained soil.
author2 Chu Jian
author_facet Chu Jian
Ong, Jun Hao
format Final Year Project
author Ong, Jun Hao
author_sort Ong, Jun Hao
title Biocementation of fine-grained soil
title_short Biocementation of fine-grained soil
title_full Biocementation of fine-grained soil
title_fullStr Biocementation of fine-grained soil
title_full_unstemmed Biocementation of fine-grained soil
title_sort biocementation of fine-grained soil
publishDate 2017
url http://hdl.handle.net/10356/72956
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