Staff View: Evaluating Biosedimentation on Strength Improvement for Acidic Soil

Evaluating Biosedimentation on Strength Improvement for Acidic Soil

Marine clay soils are problematic soils in the construction industry when they are subjected to construction loads. When these soils are loaded, they lose their structure. This leads to the soil being unable to withstand loads of any magnitude without exhibiting significant, permanent deformations....

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Main Authors:	Saad, Ahmed Hassan, Nahazanan, Haslinda, Md Yusoff, Zainuddin, Mustafa, Muskhazli, Elseknidy, Mohamed Hamdy, Mohammed Angham, Ali Mohammed
Format:	Article
Language:	English
Published:	Multidisciplinary Digital Publishing Institute 2021
Online Access:	http://psasir.upm.edu.my/id/eprint/97140/1/ABSTRACT.pdf http://psasir.upm.edu.my/id/eprint/97140/ https://www.mdpi.com/2076-3417/11/22/10817
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spelling	my.upm.eprints.971402022-09-13T09:00:11Z http://psasir.upm.edu.my/id/eprint/97140/ Evaluating Biosedimentation on Strength Improvement for Acidic Soil Saad, Ahmed Hassan Nahazanan, Haslinda Md Yusoff, Zainuddin Mustafa, Muskhazli Elseknidy, Mohamed Hamdy Mohammed Angham, Ali Mohammed Marine clay soils are problematic soils in the construction industry when they are subjected to construction loads. When these soils are loaded, they lose their structure. This leads to the soil being unable to withstand loads of any magnitude without exhibiting significant, permanent deformations. In order to stabilize the marine soil, new methods for soil improvement were built upon biogrouting by incorporating physical, biological and chemical treatments into the soil. However, the biggest challenge of this method is the bacteria migration through the soil medium. To overcome this issue, the electrokinetic phenomenon can be utilized alongside biogrouting to prevent the bacteria migration. In this regard, the present study applied electrobiogrouting stabilization to investigate the improvement of acidic marine clay soil with a pH of 3.69. To accomplish this, two large-scale physical models with dimensions of 500 × 300 × 1200 mm were fabricated to examine the influence of two different treated distances between the inlet and outlet—450 mm (D45) and 600 mm (D60)—on the stability of the treated soil. It was observed that the shear strength of the treated soil improved significantly. The shear strength at the D45 treated distance increased from 3.65 kPa (untreated soil) to 28.14 kPa (treated soil). However, the strength increased by increasing the treated distance. In addition, compressibility and soil electrical conductivity were reduced significantly, and the Atterberg limits were significantly enhanced from OH to OL. The reasons for the enhancement of treated soil were the formation of CaCO3, which filled the soil voids, and that the water content was reduced. To address issues with marine clay soil, this study aims to minimize the high cost of a special foundation system and the use of non-environmentally friendly materials such as calcium-based binders, aside from the reduction of deformations caused by loading. The findings of this study can be used for acidic soils and the improvement of soil’s geotechnical behavior in general. Multidisciplinary Digital Publishing Institute 2021 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/97140/1/ABSTRACT.pdf Saad, Ahmed Hassan and Nahazanan, Haslinda and Md Yusoff, Zainuddin and Mustafa, Muskhazli and Elseknidy, Mohamed Hamdy and Mohammed Angham, Ali Mohammed (2021) Evaluating Biosedimentation on Strength Improvement for Acidic Soil. Applied Sciences (Basel), 11 (22). pp. 1-16. ISSN 2076-3417 https://www.mdpi.com/2076-3417/11/22/10817 10.3390/app112210817
institution	Universiti Putra Malaysia
building	UPM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Putra Malaysia
content_source	UPM Institutional Repository
url_provider	http://psasir.upm.edu.my/
language	English
description	Marine clay soils are problematic soils in the construction industry when they are subjected to construction loads. When these soils are loaded, they lose their structure. This leads to the soil being unable to withstand loads of any magnitude without exhibiting significant, permanent deformations. In order to stabilize the marine soil, new methods for soil improvement were built upon biogrouting by incorporating physical, biological and chemical treatments into the soil. However, the biggest challenge of this method is the bacteria migration through the soil medium. To overcome this issue, the electrokinetic phenomenon can be utilized alongside biogrouting to prevent the bacteria migration. In this regard, the present study applied electrobiogrouting stabilization to investigate the improvement of acidic marine clay soil with a pH of 3.69. To accomplish this, two large-scale physical models with dimensions of 500 × 300 × 1200 mm were fabricated to examine the influence of two different treated distances between the inlet and outlet—450 mm (D45) and 600 mm (D60)—on the stability of the treated soil. It was observed that the shear strength of the treated soil improved significantly. The shear strength at the D45 treated distance increased from 3.65 kPa (untreated soil) to 28.14 kPa (treated soil). However, the strength increased by increasing the treated distance. In addition, compressibility and soil electrical conductivity were reduced significantly, and the Atterberg limits were significantly enhanced from OH to OL. The reasons for the enhancement of treated soil were the formation of CaCO3, which filled the soil voids, and that the water content was reduced. To address issues with marine clay soil, this study aims to minimize the high cost of a special foundation system and the use of non-environmentally friendly materials such as calcium-based binders, aside from the reduction of deformations caused by loading. The findings of this study can be used for acidic soils and the improvement of soil’s geotechnical behavior in general.
format	Article
author	Saad, Ahmed Hassan Nahazanan, Haslinda Md Yusoff, Zainuddin Mustafa, Muskhazli Elseknidy, Mohamed Hamdy Mohammed Angham, Ali Mohammed
spellingShingle	Saad, Ahmed Hassan Nahazanan, Haslinda Md Yusoff, Zainuddin Mustafa, Muskhazli Elseknidy, Mohamed Hamdy Mohammed Angham, Ali Mohammed Evaluating Biosedimentation on Strength Improvement for Acidic Soil
author_facet	Saad, Ahmed Hassan Nahazanan, Haslinda Md Yusoff, Zainuddin Mustafa, Muskhazli Elseknidy, Mohamed Hamdy Mohammed Angham, Ali Mohammed
author_sort	Saad, Ahmed Hassan
title	Evaluating Biosedimentation on Strength Improvement for Acidic Soil
title_short	Evaluating Biosedimentation on Strength Improvement for Acidic Soil
title_full	Evaluating Biosedimentation on Strength Improvement for Acidic Soil
title_fullStr	Evaluating Biosedimentation on Strength Improvement for Acidic Soil
title_full_unstemmed	Evaluating Biosedimentation on Strength Improvement for Acidic Soil
title_sort	evaluating biosedimentation on strength improvement for acidic soil
publisher	Multidisciplinary Digital Publishing Institute
publishDate	2021
url	http://psasir.upm.edu.my/id/eprint/97140/1/ABSTRACT.pdf http://psasir.upm.edu.my/id/eprint/97140/ https://www.mdpi.com/2076-3417/11/22/10817
_version_	1744355306175987712
score	13.211869

Evaluating Biosedimentation on Strength Improvement for Acidic Soil

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