Evaluation of the freeze-thaw resistance of concrete incorporating waste rubber and waste glass

• Published in: Composites communications Vol. 50; p. 102020
• Main Authors: He, Yuzhou, Zhang, Jicheng, Jiang, Zihang, Zhou, Bowen, Zheng, Zezhong, Wang, Yifan, Lu, Qichao, Huang, Wenjie
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2024
• Subjects: Freeze-thaw resistance; Glass concrete; Rubberized concrete; Solid waste recycling; Solid waste recycling; Freeze-thaw resistance; Rubberized concrete; Glass concrete
• ISSN: 2452-2139
• DOI: 10.1016/j.coco.2024.102020

In this paper, a systematic evaluation of the freeze-thaw (F-T) resistance of concrete containing waste rubber (WR) and/or waste glass (WG) was performed. Fine aggregates were replaced separately with crumb rubber (CR), glass powder (GP) and a mixture of both, and substitution rates varied from 0 to 15 % by volume. All mixtures were subjected to 25, 50, 75 and 100 F-T cycles, respectively. After reaching the desired number of F-T cycles, changes in the appearance, mass, dynamic modulus, degree of internal damage, and compressive strength of the degraded mixtures relative to the pre-freeze-thaw (Pre-F-T) condition were observed or measured. Results indicated that compared with plain concrete, rubberized concrete had superior F-T resistance but lower Pre-F-T strength. Although glass concrete may be less impressive than rubberized concrete in F-T resistance, it offered better mechanical strength and a denser microstructure. However, the incorporation of GP failed to mitigate the apparent damage and mass loss of concrete in F-T environments. Besides, the long-term F-T durability of glass concrete may be questioned, as evidenced by a sharp deterioration in nearly all of its parameters during 75–100 F-T cycles. For the combined mixtures, 15 % CR and 10 % GP have been proved to be a reasonable combination for maximizing the F-T resistance of concrete. Finally, scanning electron microscopy (SEM) was employed to reveal the mechanisms of CR and GP action in F-T environments at the microscopic level. In summary, CR and GP are materials worth considering in concrete preparation to improve its F-T resistance. •The freeze-thaw resistance of concrete containing crumb rubber (CR) and/or glass particle (GP) was systematically evaluated.•Rubberized concrete exhibited superior freeze-thaw resistance, especially at 10 % or 15 % CR substitution.•Glass concrete had better mechanical strength and denser microstructure, and performed best at 10 % GP substitution.•Of all the combined mixtures, those containing 15 % CR and 10 % GP performed the best in freeze-thaw resistance.•Mechanisms of CR and GP action in freeze-thaw environments were revealed at the microscopic level.