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Soil stabilisation with alkali-activated agro-waste

This study addresses the use of alkali-activated binder to evaluate the feasibility of using this promising technique to stabilise soils. One of the well-known agro-wastes, palm oil fuel ash (POFA), was used as a source binder. Also, sodium hydroxide (NaOH) and potassium hydroxide (KOH) were used as...

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Main Authors: Pourakbar, Shahram, Asadi, Afshin, Kim Huat, Bujang, Fasihnikoutalab, Mohammad Hamed
Format: Article
Language:English
Published: ICE Publishing 2015
Online Access:http://psasir.upm.edu.my/id/eprint/46331/1/Soil%20stabilisation%20with%20alkali-activated%20agro-waste.pdf
http://psasir.upm.edu.my/id/eprint/46331/
http://www.icevirtuallibrary.com/content/serial/envgeo
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spelling my.upm.eprints.463312018-04-27T04:16:40Z http://psasir.upm.edu.my/id/eprint/46331/ Soil stabilisation with alkali-activated agro-waste Pourakbar, Shahram Asadi, Afshin Kim Huat, Bujang Fasihnikoutalab, Mohammad Hamed This study addresses the use of alkali-activated binder to evaluate the feasibility of using this promising technique to stabilise soils. One of the well-known agro-wastes, palm oil fuel ash (POFA), was used as a source binder. Also, sodium hydroxide (NaOH) and potassium hydroxide (KOH) were used as alkaline activators. The influence of four factors including the kind of alkaline activator, the use of source binder, the curing condition and the water content of the soil on the strengthening performance of soil was evaluated according to the improvement of the unconfined compression strength (UCS). At the same alkaline concentration, both sodium hydroxide and potassium hydroxide were able to enhance the strength development rate of specimens. However, potassium hydroxide-POFA-stabilised soil yielded the highest UCS value following a long curing time (90 and 180 d of curing). The size and charge density of the alkaline activator play significant roles in controlling the rate and extent of the activation process for the strength performance. With regard to soil strength improvement, when the POFA content in the activation process increased from 0% to 15%, the UCS value increased substantially, irrespective of the alkaline activator type. This achievement implies a tremendous effect of this agro-waste on the strength behaviour of treated soil. ICE Publishing 2015-09 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/46331/1/Soil%20stabilisation%20with%20alkali-activated%20agro-waste.pdf Pourakbar, Shahram and Asadi, Afshin and Kim Huat, Bujang and Fasihnikoutalab, Mohammad Hamed (2015) Soil stabilisation with alkali-activated agro-waste. Environmental Geotechnics, 2 (6). pp. 359-370. ISSN 2051-803X http://www.icevirtuallibrary.com/content/serial/envgeo 10.1680/jenge.15.00009
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 This study addresses the use of alkali-activated binder to evaluate the feasibility of using this promising technique to stabilise soils. One of the well-known agro-wastes, palm oil fuel ash (POFA), was used as a source binder. Also, sodium hydroxide (NaOH) and potassium hydroxide (KOH) were used as alkaline activators. The influence of four factors including the kind of alkaline activator, the use of source binder, the curing condition and the water content of the soil on the strengthening performance of soil was evaluated according to the improvement of the unconfined compression strength (UCS). At the same alkaline concentration, both sodium hydroxide and potassium hydroxide were able to enhance the strength development rate of specimens. However, potassium hydroxide-POFA-stabilised soil yielded the highest UCS value following a long curing time (90 and 180 d of curing). The size and charge density of the alkaline activator play significant roles in controlling the rate and extent of the activation process for the strength performance. With regard to soil strength improvement, when the POFA content in the activation process increased from 0% to 15%, the UCS value increased substantially, irrespective of the alkaline activator type. This achievement implies a tremendous effect of this agro-waste on the strength behaviour of treated soil.
format Article
author Pourakbar, Shahram
Asadi, Afshin
Kim Huat, Bujang
Fasihnikoutalab, Mohammad Hamed
spellingShingle Pourakbar, Shahram
Asadi, Afshin
Kim Huat, Bujang
Fasihnikoutalab, Mohammad Hamed
Soil stabilisation with alkali-activated agro-waste
author_facet Pourakbar, Shahram
Asadi, Afshin
Kim Huat, Bujang
Fasihnikoutalab, Mohammad Hamed
author_sort Pourakbar, Shahram
title Soil stabilisation with alkali-activated agro-waste
title_short Soil stabilisation with alkali-activated agro-waste
title_full Soil stabilisation with alkali-activated agro-waste
title_fullStr Soil stabilisation with alkali-activated agro-waste
title_full_unstemmed Soil stabilisation with alkali-activated agro-waste
title_sort soil stabilisation with alkali-activated agro-waste
publisher ICE Publishing
publishDate 2015
url http://psasir.upm.edu.my/id/eprint/46331/1/Soil%20stabilisation%20with%20alkali-activated%20agro-waste.pdf
http://psasir.upm.edu.my/id/eprint/46331/
http://www.icevirtuallibrary.com/content/serial/envgeo
_version_ 1643833753082003456
score 13.211869

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