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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
ICE Publishing
2015
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| Online Access: | http://psasir.upm.edu.my/id/eprint/46331/1/Soil%20stabilisation%20with%20alkali-activated%20agro-waste.pdf |
| _version_ | 1796974656075333632 |
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| author | Pourakbar, Shahram Asadi, Afshin Kim Huat, Bujang Fasihnikoutalab, Mohammad Hamed |
| author_facet | Pourakbar, Shahram Asadi, Afshin Kim Huat, Bujang Fasihnikoutalab, Mohammad Hamed |
| author_sort | Pourakbar, Shahram |
| collection | UPM |
| 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. |
| first_indexed | 2024-03-06T09:00:10Z |
| format | Article |
| id | upm.eprints-46331 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:00:10Z |
| publishDate | 2015 |
| publisher | ICE Publishing |
| record_format | dspace |
| spelling | 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 |
| spellingShingle | Pourakbar, Shahram Asadi, Afshin Kim Huat, Bujang Fasihnikoutalab, Mohammad Hamed Soil stabilisation with alkali-activated agro-waste |
| title | 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_short | Soil stabilisation with alkali-activated agro-waste |
| title_sort | soil stabilisation with alkali activated agro waste |
| url | http://psasir.upm.edu.my/id/eprint/46331/1/Soil%20stabilisation%20with%20alkali-activated%20agro-waste.pdf |
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