Staff View: Model study of alkali-activated waste binder for soil stabilization

Model study of alkali-activated waste binder for soil stabilization

This study assesses the laboratory investigation to evaluate the feasibility of using alkaline activation technique for engineering improvement of soils. The originality of this paper stems from the novel two-stage approach. The first stage investigates the effectiveness of locally available precurs...

Full description

Saved in:

Bibliographic Details
Main Authors:	Pourakbar, Shahram, Kim Huat, Bujang, Asadi, Afshin, Fasihnikoutalab, Mohammad Hamed
Format:	Article
Language:	English
Published:	Springer 2016
Online Access:	http://psasir.upm.edu.my/id/eprint/53301/1/Model%20study%20of%20alkali-activated%20waste%20binder%20for%20soil%20stabilization.pdf http://psasir.upm.edu.my/id/eprint/53301/ https://link.springer.com/article/10.1007/s40891-016-0075-1
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my.upm.eprints.53301
record_format	eprints
spelling	my.upm.eprints.533012022-03-18T01:24:02Z http://psasir.upm.edu.my/id/eprint/53301/ Model study of alkali-activated waste binder for soil stabilization Pourakbar, Shahram Kim Huat, Bujang Asadi, Afshin Fasihnikoutalab, Mohammad Hamed This study assesses the laboratory investigation to evaluate the feasibility of using alkaline activation technique for engineering improvement of soils. The originality of this paper stems from the novel two-stage approach. The first stage investigates the effectiveness of locally available precursor in the alkaline activation process by focusing on soil strength improvement. As such, in presence of high alkali solutes (Na-based and Ka-based alkaline activators), palm oil fuel ash (POFA) was used as a precursor due to its amorphous nature and high silica-to-alumina ratio. In the second stage of this study, geotechnical model procedure of interaction between a strip footing model and stabilized soil by column technique and the most effective percentage of POFA was performed. According to the test results, applying alkaline activators to soil induced low strengths of up to 159 kPa after 7 days curing. When the POFA content used in alkaline activation increased from 0 to 15%, the UCS values increased up to 226% after similar curing duration. This assertion reflects the fact that the addition of POFA enriched the reactive Si and Al in the matrix, which allowed stronger Si–O–Si and Al–O–Si bonds to form. Curing condition, type and quantity of the alkaline activators were also shown to have significant strengthening effects on the treated soil. In this respect, the use of moderate 10 M NaOH and 10 M KOH were found to be viable as the best concentration for strength improvement of investigated soil when economy and practicality were considered. In terms of using alkali-activators, the use of the NaOH for soil treatment is beneficial in terms of lower cost, since the price of KOH solution is higher than that of the NaOH solution. Results of the second phase showed that a considerable settlement reduction up to 192% of treated columns by means of alkaline activation could be achieved. Springer 2016-12 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/53301/1/Model%20study%20of%20alkali-activated%20waste%20binder%20for%20soil%20stabilization.pdf Pourakbar, Shahram and Kim Huat, Bujang and Asadi, Afshin and Fasihnikoutalab, Mohammad Hamed (2016) Model study of alkali-activated waste binder for soil stabilization. International Journal of Geosynthetics and Ground Engineering, 2 (35). pp. 1-12. ISSN 2199-9260; ESSN: 2199-9279 https://link.springer.com/article/10.1007/s40891-016-0075-1 10.1007/s40891-016-0075-1
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 assesses the laboratory investigation to evaluate the feasibility of using alkaline activation technique for engineering improvement of soils. The originality of this paper stems from the novel two-stage approach. The first stage investigates the effectiveness of locally available precursor in the alkaline activation process by focusing on soil strength improvement. As such, in presence of high alkali solutes (Na-based and Ka-based alkaline activators), palm oil fuel ash (POFA) was used as a precursor due to its amorphous nature and high silica-to-alumina ratio. In the second stage of this study, geotechnical model procedure of interaction between a strip footing model and stabilized soil by column technique and the most effective percentage of POFA was performed. According to the test results, applying alkaline activators to soil induced low strengths of up to 159 kPa after 7 days curing. When the POFA content used in alkaline activation increased from 0 to 15%, the UCS values increased up to 226% after similar curing duration. This assertion reflects the fact that the addition of POFA enriched the reactive Si and Al in the matrix, which allowed stronger Si–O–Si and Al–O–Si bonds to form. Curing condition, type and quantity of the alkaline activators were also shown to have significant strengthening effects on the treated soil. In this respect, the use of moderate 10 M NaOH and 10 M KOH were found to be viable as the best concentration for strength improvement of investigated soil when economy and practicality were considered. In terms of using alkali-activators, the use of the NaOH for soil treatment is beneficial in terms of lower cost, since the price of KOH solution is higher than that of the NaOH solution. Results of the second phase showed that a considerable settlement reduction up to 192% of treated columns by means of alkaline activation could be achieved.
format	Article
author	Pourakbar, Shahram Kim Huat, Bujang Asadi, Afshin Fasihnikoutalab, Mohammad Hamed
spellingShingle	Pourakbar, Shahram Kim Huat, Bujang Asadi, Afshin Fasihnikoutalab, Mohammad Hamed Model study of alkali-activated waste binder for soil stabilization
author_facet	Pourakbar, Shahram Kim Huat, Bujang Asadi, Afshin Fasihnikoutalab, Mohammad Hamed
author_sort	Pourakbar, Shahram
title	Model study of alkali-activated waste binder for soil stabilization
title_short	Model study of alkali-activated waste binder for soil stabilization
title_full	Model study of alkali-activated waste binder for soil stabilization
title_fullStr	Model study of alkali-activated waste binder for soil stabilization
title_full_unstemmed	Model study of alkali-activated waste binder for soil stabilization
title_sort	model study of alkali-activated waste binder for soil stabilization
publisher	Springer
publishDate	2016
url	http://psasir.upm.edu.my/id/eprint/53301/1/Model%20study%20of%20alkali-activated%20waste%20binder%20for%20soil%20stabilization.pdf http://psasir.upm.edu.my/id/eprint/53301/ https://link.springer.com/article/10.1007/s40891-016-0075-1
_version_	1728052808843788288
score	13.211869

Model study of alkali-activated waste binder for soil stabilization

Similar Items