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Permanent link (DOI): https://doi.org/10.7939/R32805530

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Feasibility Studies on Usage of Agro-Forestry-Based Ash as a Cement Replacement in Concrete Open Access

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Other title
Subject/Keyword
Cement Replacement
Concrete
Agro-Forestry-Based Ash
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Setayesh Gar, Parisa
Supervisor and department
Dr. Vivek Bindiganavile
Examining committee member and department
Dr. Carlos Cruz Noguez, Civil & Environmental Engineering, Structure Group
Dr. Yaman Boluk, Civil & Environmental Engineering, Structure Group
Department
Department of Civil and Environmental Engineering
Specialization
Structural Engineering
Date accepted
2015-03-26T14:11:40Z
Graduation date
2015-06
Degree
Master of Science
Degree level
Master's
Abstract
This study is part of a joint Canada-India research program to effect sustainable construction. Alberta generates a significant amount of waste from agricultural- and forest-based industries. Similarly, India has lots of sugar cane bagasse waste. Researchers in both countries want to use these forms of waste in concrete, not only to solve the problem of land filling, but also to use it, if possible, as a supplementary cementing material to reduce the economic and environmental cost of concrete. In the present investigation, a feasibility study is made to examine agro-based ashes as supplementary admixtures in concrete. These agro-based ashes are waste generated from pulp and paper mills, typically consisting of a mixture of hardwood and softwood barks and their fine residues. Also, ash resulting from sugar cane bagasse, which is burnt as fuel in sugar mills, has also been investigated as a pozzolanic admixture, especially for resistance to sustained elevated temperatures. All of the ash samples were first characterized for chemical composition and physical properties, including grain-size distribution, density and chemical composition. Subsequently, the ash was added to concrete as a supplementary cementing material to study the compressive and tensile performance of hardened concrete. With sugar cane bagasse ash, specimens of concrete incorporating different percentages of ash as a mass replacement of Portland cement were subjected to compression and split tensile tests under different temperatures. From the strength point of view, the results are encouraging: for example, when the dosage level of Alberta`s agro-based ashes ii was as high as 15%, the strength was still seen as promising. The findings strongly endorse that sugar cane bagasse ash imparts resistance to concrete against elevated temperatures and may be used as a supplementary cementing admixture. Results show that these agro-based ashes can be used in normal-strength concrete buildings.
Language
English
DOI
doi:10.7939/R32805530
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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