Performance of Biocemented Sydney Sand using ex-situ mixing technique

This paper describes a small-scale demonstration of an ex situ mixing technique that uses biocementation as an alternative to existing ground improvement techniques. The main objective of this research is to improve the strength and the stiffness of loose sand. Biocemented sand specimens have been p...

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Main Authors:	Youventharan, Duraisamy, Airey, David
Format:	Article
Language:	English
Published:	Maney 2015
Subjects:	TA Engineering (General). Civil engineering (General) TH Building construction
Online Access:	http://umpir.ump.edu.my/id/eprint/10179/ http://umpir.ump.edu.my/id/eprint/10179/ http://umpir.ump.edu.my/id/eprint/10179/ http://umpir.ump.edu.my/id/eprint/10179/1/DFI122.pdf

id	ump-10179
recordtype	eprints
spelling	ump-101792018-04-18T01:10:46Z http://umpir.ump.edu.my/id/eprint/10179/ Performance of Biocemented Sydney Sand using ex-situ mixing technique Youventharan, Duraisamy Airey, David TA Engineering (General). Civil engineering (General) TH Building construction This paper describes a small-scale demonstration of an ex situ mixing technique that uses biocementation as an alternative to existing ground improvement techniques. The main objective of this research is to improve the strength and the stiffness of loose sand. Biocemented sand specimens have been produced by mixing a urease producing bacteria with nutrients and Sydney sand. Triaxial test with bender elements and the physical model test are conducted to investigate calcium carbonate precipitation and the properties of the soil. The model foundation tests have been performed at 1 g in a cylindrical tank with diameter of 600 mm. The tank has been filled with loose Sydney sand and a cemented column of 38 mm in diameter has been created in the center of the tank. A footing of 90 mm diameter has been placed on the sand surface and loaded to large displacements. The ability of the biocemented column made by ex situ mixing to significantly improve the foundation response is well demonstrated. Triaxial test performed on biocemented specimens also showed significant strength and stiffness increase over uncemented specimens. These tests confirmed the feasibility of using ex situ mixing technique to induce biocementation and provide valuable insight into the factors that must be considered in developing field applications. Maney 2015 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/10179/1/DFI122.pdf Youventharan, Duraisamy and Airey, David (2015) Performance of Biocemented Sydney Sand using ex-situ mixing technique. DFI Journal: The Journal of the Deep Foundations Institute, 9 (1). pp. 48-56. ISSN 1937-5247 (print); 1937-5255 (online) http://dx.doi.org/10.1179/1937525515Y.0000000002 DOI: 10.1179/1937525515Y.0000000002
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TA Engineering (General). Civil engineering (General) TH Building construction
spellingShingle	TA Engineering (General). Civil engineering (General) TH Building construction Youventharan, Duraisamy Airey, David Performance of Biocemented Sydney Sand using ex-situ mixing technique
description	This paper describes a small-scale demonstration of an ex situ mixing technique that uses biocementation as an alternative to existing ground improvement techniques. The main objective of this research is to improve the strength and the stiffness of loose sand. Biocemented sand specimens have been produced by mixing a urease producing bacteria with nutrients and Sydney sand. Triaxial test with bender elements and the physical model test are conducted to investigate calcium carbonate precipitation and the properties of the soil. The model foundation tests have been performed at 1 g in a cylindrical tank with diameter of 600 mm. The tank has been filled with loose Sydney sand and a cemented column of 38 mm in diameter has been created in the center of the tank. A footing of 90 mm diameter has been placed on the sand surface and loaded to large displacements. The ability of the biocemented column made by ex situ mixing to significantly improve the foundation response is well demonstrated. Triaxial test performed on biocemented specimens also showed significant strength and stiffness increase over uncemented specimens. These tests confirmed the feasibility of using ex situ mixing technique to induce biocementation and provide valuable insight into the factors that must be considered in developing field applications.
format	Article
author	Youventharan, Duraisamy Airey, David
author_facet	Youventharan, Duraisamy Airey, David
author_sort	Youventharan, Duraisamy
title	Performance of Biocemented Sydney Sand using ex-situ mixing technique
title_short	Performance of Biocemented Sydney Sand using ex-situ mixing technique
title_full	Performance of Biocemented Sydney Sand using ex-situ mixing technique
title_fullStr	Performance of Biocemented Sydney Sand using ex-situ mixing technique
title_full_unstemmed	Performance of Biocemented Sydney Sand using ex-situ mixing technique
title_sort	performance of biocemented sydney sand using ex-situ mixing technique
publisher	Maney
publishDate	2015
url	http://umpir.ump.edu.my/id/eprint/10179/ http://umpir.ump.edu.my/id/eprint/10179/ http://umpir.ump.edu.my/id/eprint/10179/ http://umpir.ump.edu.my/id/eprint/10179/1/DFI122.pdf
first_indexed	2023-09-18T22:09:31Z
last_indexed	2023-09-18T22:09:31Z
_version_	1777414932839530496

Performance of Biocemented Sydney Sand using ex-situ mixing technique

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