Potential alkali silica reaction expansion mitigation of ferronickel slag aggregate by fly ash
This study investigates the potential alkali silica reaction (ASR) of ferronickel slag (FNS) aggregate, which is a by-product of nickel production. A class F fly ash was used as a possible ASR mitigation in accelerated mortar bar test (AMBT) specimens containing 50% FNS. There were visible surface c...
| Main Authors: | , |
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| Format: | Journal Article |
| Published: |
International Federation of Prestressing
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/66641 |
| _version_ | 1848761359603335168 |
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| author | Saha, A. Sarker, Prabir |
| author_facet | Saha, A. Sarker, Prabir |
| author_sort | Saha, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study investigates the potential alkali silica reaction (ASR) of ferronickel slag (FNS) aggregate, which is a by-product of nickel production. A class F fly ash was used as a possible ASR mitigation in accelerated mortar bar test (AMBT) specimens containing 50% FNS. There were visible surface cracks on the specimens using no fly ash or 10% fly ash. Use of 20% fly ash reduced expansion by 45% as compared to that with 10% fly ash. In accordance with the expansion limits of Australian Standard, the mixtures using 20 and 30% fly ash were categorized as slowly reactive and nonreactive, respectively. Thermogravimetric analysis (TGA) and microstructural observations confirmed the effectiveness of fly ash in reducing Portlandite content that reduced the ASR expansion. Therefore, the use of 20-30% fly ash as cement replacement is considered as an adequate ASR mitigating measure of FNS fine aggregate. |
| first_indexed | 2025-11-14T10:30:25Z |
| format | Journal Article |
| id | curtin-20.500.11937-66641 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:30:25Z |
| publishDate | 2018 |
| publisher | International Federation of Prestressing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-666412019-05-02T07:00:59Z Potential alkali silica reaction expansion mitigation of ferronickel slag aggregate by fly ash Saha, A. Sarker, Prabir This study investigates the potential alkali silica reaction (ASR) of ferronickel slag (FNS) aggregate, which is a by-product of nickel production. A class F fly ash was used as a possible ASR mitigation in accelerated mortar bar test (AMBT) specimens containing 50% FNS. There were visible surface cracks on the specimens using no fly ash or 10% fly ash. Use of 20% fly ash reduced expansion by 45% as compared to that with 10% fly ash. In accordance with the expansion limits of Australian Standard, the mixtures using 20 and 30% fly ash were categorized as slowly reactive and nonreactive, respectively. Thermogravimetric analysis (TGA) and microstructural observations confirmed the effectiveness of fly ash in reducing Portlandite content that reduced the ASR expansion. Therefore, the use of 20-30% fly ash as cement replacement is considered as an adequate ASR mitigating measure of FNS fine aggregate. 2018 Journal Article http://hdl.handle.net/20.500.11937/66641 10.1002/suco.201700273 International Federation of Prestressing fulltext |
| spellingShingle | Saha, A. Sarker, Prabir Potential alkali silica reaction expansion mitigation of ferronickel slag aggregate by fly ash |
| title | Potential alkali silica reaction expansion mitigation of ferronickel slag aggregate by fly ash |
| title_full | Potential alkali silica reaction expansion mitigation of ferronickel slag aggregate by fly ash |
| title_fullStr | Potential alkali silica reaction expansion mitigation of ferronickel slag aggregate by fly ash |
| title_full_unstemmed | Potential alkali silica reaction expansion mitigation of ferronickel slag aggregate by fly ash |
| title_short | Potential alkali silica reaction expansion mitigation of ferronickel slag aggregate by fly ash |
| title_sort | potential alkali silica reaction expansion mitigation of ferronickel slag aggregate by fly ash |
| url | http://hdl.handle.net/20.500.11937/66641 |