Chen, Yanyan and Zou, Chuanlong and Yeo, Jerome Song and Lin, Jiayi and Tan, Tee How and Mo, Kim Hung (2025) Valorization of high-volume crushed waste glass as fine aggregate in foamed geopolymer. Case Studies in Construction Materials, 22. e04202. ISSN 2214-5095, DOI https://doi.org/10.1016/j.cscm.2025.e04202.
Full text not available from this repository.Abstract
The high production and low recycling rate of waste glass (WG) have come under increased scrutiny. While WG can be incorporated into construction materials as a binder or aggregate, its susceptibility to alkali-silica reaction (ASR) expansion restricts its large-scale usage. As a result, WG is typically used in controlled proportions or with reduced particle size, diminishing the environmental benefits. Additionally, investigations on the use of WG in geopolymer applications are less intensive compared to those involving Portland cement-based materials. This work, therefore, explores the feasibility of utilizing 100 % crushed waste glass (CWG), crushed and sieved to a size below 4 mm, as fine aggregate in geopolymer applications while investigating the viability of mitigating deleterious ASR expansion using a chemical foaming approach. Results indicate non-foamed geopolymer specimens prepared using CWG exhibited deleterious ASR expansion of 0.54 % at 14 days, despite the enhanced compressive strength, suggesting a reaction occurred between geopolymer paste and CWG. In contrast, the ASR expansion of foamed geopolymer specimens with CWG was significantly reduced to 0.09 %, meeting the 0.1 % threshold specified in ASTM C1260. Notably, the performance of foamed geopolymer specimens prepared with CWG was comparable to those prepared with natural sand. This work demonstrates a viable approach to increase the WG utilization rate without the need to reduce the WG particle size to micron level, while contributing to land conservation. It is estimated that by increasing the recycling rate of WG by 10 %, up to 1493.2 ha of land could be conserved.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education Malaysia under the Fundamental Research Grant Scheme (FRGS/1/2024/TK01/TARUMT/02/1), Basic Ability Improvement Project for Young and Middle-aged Teachers in Colleges and Universities in Guangxi, China (2023KY1865) |
| Uncontrolled Keywords: | Foamed; Geopolymer; Alkali-silica reaction; Crushed waste glass; Land conservation |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering > Department of Civil Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 26 May 2025 01:57 |
| Last Modified: | 26 May 2025 01:57 |
| URI: | http://eprints.um.edu.my/id/eprint/48012 |
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