{"title":"评估加入废橡胶和废玻璃的混凝土的抗冻融性","authors":"","doi":"10.1016/j.coco.2024.102020","DOIUrl":null,"url":null,"abstract":"<div><p>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.</p></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":null,"pages":null},"PeriodicalIF":6.5000,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Evaluation of the freeze-thaw resistance of concrete incorporating waste rubber and waste glass\",\"authors\":\"\",\"doi\":\"10.1016/j.coco.2024.102020\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>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.</p></div>\",\"PeriodicalId\":10533,\"journal\":{\"name\":\"Composites Communications\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.5000,\"publicationDate\":\"2024-07-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Composites Communications\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2452213924002110\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, COMPOSITES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Composites Communications","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2452213924002110","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COMPOSITES","Score":null,"Total":0}
Evaluation of the freeze-thaw resistance of concrete incorporating waste rubber and waste glass
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.
期刊介绍:
Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.