Utilization of waste glass as precursor material in one-part alkali-activated aggregates
The increasing demand for glass products has led to a rise in waste glass (WG), which is commonly disposed of in landfills, causing environmental degradation. Moreover, the direct adoption of a high volume of WG as aggregates in concrete can lead to unfavorable ASR expansion due to its high level of...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424024748 |
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| author | Yanyan Chen Chuanlong Zou Chee Lok Yong Richard Juat Shin Jan Tee How Tan Jiayi Lin Kim Hung Mo |
| author_facet | Yanyan Chen Chuanlong Zou Chee Lok Yong Richard Juat Shin Jan Tee How Tan Jiayi Lin Kim Hung Mo |
| author_sort | Yanyan Chen |
| collection | DOAJ |
| description | The increasing demand for glass products has led to a rise in waste glass (WG), which is commonly disposed of in landfills, causing environmental degradation. Moreover, the direct adoption of a high volume of WG as aggregates in concrete can lead to unfavorable ASR expansion due to its high level of reactive silica. This study explores a one-part alkali activation method to produce WG-based aggregates, aiming to reduce the reactive silica content, mitigate ASR expansion and increase the recycling rate of WG. Waste glass powder (WGP) with a replacement ratio of 100% was combined with two different alkalis (sodium metasilicate pentahydrate (Na2SiO3.5H2O) and sodium aluminate (NaAlO2)) through the cold-bonded one-part alkali activation method to produce WG-based alkali-activated aggregates (WG-AAAs). The influence of various activator contents (0%, 6%, 9%, 12% and 15%) on the physical and mechanical properties of the WG-AAAs was investigated. The WG-AAAs had a bulk density ranging from 920 to 1010 kg/m3, which can be classified as lightweight aggregates. The WG-AAAs with 12% NaAlO2 showed the best performance, with a water absorption of 8.46% and single particle crushing strength of 3.19 MPa. SEM-EDS and XRD results indicated that WG-AAAs with the supply of alumina from NaAlO2 exhibited a lower Si/Al ratio, leading to the formation of C-(N)-A-S-H gel, which improved the strength and creating a denser microstructure. Furthermore, the WG-AAAs showed no ASR expansion concerns, conforming to the expansion limit specified in ASTM C1260. |
| format | Article |
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| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-1bc4a9d94fee4ec1b48d916cc66fe13d2025-08-20T02:35:25ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01335551555810.1016/j.jmrt.2024.10.204Utilization of waste glass as precursor material in one-part alkali-activated aggregatesYanyan Chen0Chuanlong Zou1Chee Lok Yong2Richard Juat Shin Jan3Tee How Tan4Jiayi Lin5Kim Hung Mo6College of Architecture and Civil Engineering, Nanning University, 530200, Nanning, ChinaDepartment of Civil Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, MalaysiaDepartment of Civil Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, MalaysiaDepartment of Civil Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, MalaysiaDepartment of Construction Management, Faculty of Built Environment, Tunku Abdul Rahman University of Management and Technology, 53300, Kuala Lumpur, MalaysiaDepartment of Civil Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia; Corresponding author.Department of Engineering, School of Engineering and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500, Selangor Darul Ehsan, MalaysiaThe increasing demand for glass products has led to a rise in waste glass (WG), which is commonly disposed of in landfills, causing environmental degradation. Moreover, the direct adoption of a high volume of WG as aggregates in concrete can lead to unfavorable ASR expansion due to its high level of reactive silica. This study explores a one-part alkali activation method to produce WG-based aggregates, aiming to reduce the reactive silica content, mitigate ASR expansion and increase the recycling rate of WG. Waste glass powder (WGP) with a replacement ratio of 100% was combined with two different alkalis (sodium metasilicate pentahydrate (Na2SiO3.5H2O) and sodium aluminate (NaAlO2)) through the cold-bonded one-part alkali activation method to produce WG-based alkali-activated aggregates (WG-AAAs). The influence of various activator contents (0%, 6%, 9%, 12% and 15%) on the physical and mechanical properties of the WG-AAAs was investigated. The WG-AAAs had a bulk density ranging from 920 to 1010 kg/m3, which can be classified as lightweight aggregates. The WG-AAAs with 12% NaAlO2 showed the best performance, with a water absorption of 8.46% and single particle crushing strength of 3.19 MPa. SEM-EDS and XRD results indicated that WG-AAAs with the supply of alumina from NaAlO2 exhibited a lower Si/Al ratio, leading to the formation of C-(N)-A-S-H gel, which improved the strength and creating a denser microstructure. Furthermore, the WG-AAAs showed no ASR expansion concerns, conforming to the expansion limit specified in ASTM C1260.http://www.sciencedirect.com/science/article/pii/S2238785424024748Waste glassArtificial lightweight aggregateCold-bonded aggregateOne-part alkali activationAlkali-silica reactionMicrostructure |
| spellingShingle | Yanyan Chen Chuanlong Zou Chee Lok Yong Richard Juat Shin Jan Tee How Tan Jiayi Lin Kim Hung Mo Utilization of waste glass as precursor material in one-part alkali-activated aggregates Journal of Materials Research and Technology Waste glass Artificial lightweight aggregate Cold-bonded aggregate One-part alkali activation Alkali-silica reaction Microstructure |
| title | Utilization of waste glass as precursor material in one-part alkali-activated aggregates |
| title_full | Utilization of waste glass as precursor material in one-part alkali-activated aggregates |
| title_fullStr | Utilization of waste glass as precursor material in one-part alkali-activated aggregates |
| title_full_unstemmed | Utilization of waste glass as precursor material in one-part alkali-activated aggregates |
| title_short | Utilization of waste glass as precursor material in one-part alkali-activated aggregates |
| title_sort | utilization of waste glass as precursor material in one part alkali activated aggregates |
| topic | Waste glass Artificial lightweight aggregate Cold-bonded aggregate One-part alkali activation Alkali-silica reaction Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424024748 |
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