The strength of soft clay reinforced with singular and group bottom ash columns

Stone column is a ground improvement technique in which some of the soil is being replaced with granular material such as crushed rocks or sand. Stone columns are usually installed in soft cohesive soil to improve bearing capacity and accelerate the dissipation of pore water pressure when load is im...

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Main Authors: Hasan, Muzamir, Marto, Aminaton, Hyodo, Masayuki, Makhtar, Ahmad Mahir
Format: Article
Published: EJGE 2011
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Online Access:http://eprints.utm.my/id/eprint/29776/
http://www.civil.utm.my/file/file/Journals%202011/The%20Strength%20of%20Soft%20Clay%20Reinforced%20with%20Singular%20and%20Group%20Bottom%20Ash%20Columns.pdf
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spelling my.utm.297762017-10-23T16:11:08Z http://eprints.utm.my/id/eprint/29776/ The strength of soft clay reinforced with singular and group bottom ash columns Hasan, Muzamir Marto, Aminaton Hyodo, Masayuki Makhtar, Ahmad Mahir TA Engineering (General). Civil engineering (General) Stone column is a ground improvement technique in which some of the soil is being replaced with granular material such as crushed rocks or sand. Stone columns are usually installed in soft cohesive soil to improve bearing capacity and accelerate the dissipation of pore water pressure when load is imposed to the soil. Since “bottom ash”, as the by-product of coal burning, has same properties to granular materials, there is a potential of using bottom ash as stone columns. By introducing bottom ash columns, the cost of project could significantly be reduced and the disposal problem for bottom ash would be solved. Besides that, sustainability in construction can be achieved by the utilization of bottom ash. This paper discusses the results of the improvement in strength of soft clay when inserted with singular and group bottom ash columns. A total of 8 batches of kaolin samples had been tested to determine the shear strength. Each batch consisted of three samples to represent samples without bottom ash column, samples with partially penetrating bottom ash column and samples with fully penetrating for singular and group of bottom ash columns. A total of 24 unconfined compression tests had been conducted on soft kaolin specimens. The specimens used were 50 mm in diameter and 100 mm in height. The diameter of the bottom ash column is 10 mm and the heights of the column are 60 mm and 100 mm. For singular column, the column was installed at the centre of the specimen and for the group columns had been arranged in square pattern. The improvement rate for partially and fully penetrating singular column is between 13 to 26 % and from 2 to 15 % respectively. While for group columns, the improvement rate for partially and fully penetrating column is between 20 to 27 % and from 9 to 66 % respectively. It can be concluded that that the shear strength of soft clay could be improved by the installation of bottom ash columns. However for singular column, the value of shear strength of soft clay inserted with partially penetrating column increased more significant compared to the fully penetrating column. EJGE 2011 Article PeerReviewed Hasan, Muzamir and Marto, Aminaton and Hyodo, Masayuki and Makhtar, Ahmad Mahir (2011) The strength of soft clay reinforced with singular and group bottom ash columns. Electronic Journal of Geotechnical Engineering, 16 N . pp. 1215-1227. ISSN 1089-3032 http://www.civil.utm.my/file/file/Journals%202011/The%20Strength%20of%20Soft%20Clay%20Reinforced%20with%20Singular%20and%20Group%20Bottom%20Ash%20Columns.pdf
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)
Hasan, Muzamir
Marto, Aminaton
Hyodo, Masayuki
Makhtar, Ahmad Mahir
The strength of soft clay reinforced with singular and group bottom ash columns
description Stone column is a ground improvement technique in which some of the soil is being replaced with granular material such as crushed rocks or sand. Stone columns are usually installed in soft cohesive soil to improve bearing capacity and accelerate the dissipation of pore water pressure when load is imposed to the soil. Since “bottom ash”, as the by-product of coal burning, has same properties to granular materials, there is a potential of using bottom ash as stone columns. By introducing bottom ash columns, the cost of project could significantly be reduced and the disposal problem for bottom ash would be solved. Besides that, sustainability in construction can be achieved by the utilization of bottom ash. This paper discusses the results of the improvement in strength of soft clay when inserted with singular and group bottom ash columns. A total of 8 batches of kaolin samples had been tested to determine the shear strength. Each batch consisted of three samples to represent samples without bottom ash column, samples with partially penetrating bottom ash column and samples with fully penetrating for singular and group of bottom ash columns. A total of 24 unconfined compression tests had been conducted on soft kaolin specimens. The specimens used were 50 mm in diameter and 100 mm in height. The diameter of the bottom ash column is 10 mm and the heights of the column are 60 mm and 100 mm. For singular column, the column was installed at the centre of the specimen and for the group columns had been arranged in square pattern. The improvement rate for partially and fully penetrating singular column is between 13 to 26 % and from 2 to 15 % respectively. While for group columns, the improvement rate for partially and fully penetrating column is between 20 to 27 % and from 9 to 66 % respectively. It can be concluded that that the shear strength of soft clay could be improved by the installation of bottom ash columns. However for singular column, the value of shear strength of soft clay inserted with partially penetrating column increased more significant compared to the fully penetrating column.
format Article
author Hasan, Muzamir
Marto, Aminaton
Hyodo, Masayuki
Makhtar, Ahmad Mahir
author_facet Hasan, Muzamir
Marto, Aminaton
Hyodo, Masayuki
Makhtar, Ahmad Mahir
author_sort Hasan, Muzamir
title The strength of soft clay reinforced with singular and group bottom ash columns
title_short The strength of soft clay reinforced with singular and group bottom ash columns
title_full The strength of soft clay reinforced with singular and group bottom ash columns
title_fullStr The strength of soft clay reinforced with singular and group bottom ash columns
title_full_unstemmed The strength of soft clay reinforced with singular and group bottom ash columns
title_sort strength of soft clay reinforced with singular and group bottom ash columns
publisher EJGE
publishDate 2011
url http://eprints.utm.my/id/eprint/29776/
http://www.civil.utm.my/file/file/Journals%202011/The%20Strength%20of%20Soft%20Clay%20Reinforced%20with%20Singular%20and%20Group%20Bottom%20Ash%20Columns.pdf
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score 13.211869