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Al Mohammad, A, ÇEVİK, A, Jwaida, Z and Shubbar, A (2024) Effect of Expanded Glass Lightweight Aggregate on the Performance of Geopolymer Mortar at Elevated Temperatures. Iranian Journal of Science and Technology, Transactions of Civil Engineering. ISSN 2228-6160
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Mohammad_et_al-2024-Iranian_Journal_of_Science_and_Technology,_Transactions_of_Civil_Engineering.pdf - Published Version Available under License Creative Commons Attribution. Download (2MB) | Preview |
Abstract
The greenhouse gas emissions associated with conventional concrete as a result of the cement industry have prompted scientists to search for eco-friendly alternatives. Among these promising alternatives is geopolymer concrete or mortar. This work studies the impact of using polyvinyl alcohol (PVA) fibers and lightweight expanded glass (EG) aggregate on the mechanical behaviour of lightweight geopolymer mortar (LWGM) at various temperatures (room temperature, 250 °C, and 500 °C). EG was utilized to partially replace the sand by 10 and 20%. Limited studies dealt with geopolymer mortar based on such composition at high temperatures. The geopolymer mortar was created using slag as the main precursor activated by a mixed solution of sodium hydroxide and sodium silicate. Various combinations were produced, and their behaviour was observed at room and high temperatures. Several tests such as workability, compressive and flexural strengths, density, stress-strain relationship, load-displacement behaviour, and uniaxial tensile strength were performed. The findings of the study indicate that the density and compressive strength of geopolymer mortar reduced with increasing the replacement level by the EG. However, the utilization of 10% EG can produce a lightweight mortar with a compressive strength of 17.9 at 28 days. Moreover, the use of 1% PVA significantly improves the mechanical performance. Furthermore, the mechanical characteristics of the materials were considerably altered when subjected to extreme temperatures of 500 °C as observed from experimental data.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 0905 Civil Engineering |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Civil Engineering & Built Environment |
| Publisher: | Springer Science |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 16 Jul 2024 10:57 |
| Last Modified: | 16 Jul 2024 10:57 |
| DOI or ID number: | 10.1007/s40996-024-01526-2 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/23756 |
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