{"title":"流水养护对再生骨料混凝土孔隙结构的影响","authors":"Yuzhi Chen, Yingjie Ning, Xudong Chen, Weihong Xuan, Yuzhu Guo","doi":"10.1680/jadcr.22.00092","DOIUrl":null,"url":null,"abstract":"Pore in steam-cured concrete affect its strength and durability, and the optimization of steaming system can improve the pore structure to some extent. However, the influence mechanism of evaporation on recycled aggregate concrete (RCA) remains unclear. In this paper, the effects of curing temperature (20°C, 40°C, 60°C and 80°C), steam curing time (6h, 9h and 12h) and pozzolans (slag powder and fly ash) on the compressive strength and pore structure of RAC were studied. The microstructure characteristics such as pore size and pore size distribution were analyzed by the mercury injection porosimetry. The results shown that steam curing can significantly improve the compressive strength and reduce the most probable aperture and average pore sizes of RAC. Moreover, the effect of slag powder on RAC pore structure is better than that of fly ash. And there is a linear correlation between the compressive strength and the average pore size of steam-cured RAC. This can be an important parameter for constructing future steam cured RAC strength prediction models.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of stream curing on the pore structure of recycled aggregate concrete\",\"authors\":\"Yuzhi Chen, Yingjie Ning, Xudong Chen, Weihong Xuan, Yuzhu Guo\",\"doi\":\"10.1680/jadcr.22.00092\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Pore in steam-cured concrete affect its strength and durability, and the optimization of steaming system can improve the pore structure to some extent. However, the influence mechanism of evaporation on recycled aggregate concrete (RCA) remains unclear. In this paper, the effects of curing temperature (20°C, 40°C, 60°C and 80°C), steam curing time (6h, 9h and 12h) and pozzolans (slag powder and fly ash) on the compressive strength and pore structure of RAC were studied. The microstructure characteristics such as pore size and pore size distribution were analyzed by the mercury injection porosimetry. The results shown that steam curing can significantly improve the compressive strength and reduce the most probable aperture and average pore sizes of RAC. Moreover, the effect of slag powder on RAC pore structure is better than that of fly ash. And there is a linear correlation between the compressive strength and the average pore size of steam-cured RAC. This can be an important parameter for constructing future steam cured RAC strength prediction models.\",\"PeriodicalId\":1,\"journal\":{\"name\":\"Accounts of Chemical Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":16.4000,\"publicationDate\":\"2024-02-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Accounts of Chemical Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1680/jadcr.22.00092\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1680/jadcr.22.00092","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Effects of stream curing on the pore structure of recycled aggregate concrete
Pore in steam-cured concrete affect its strength and durability, and the optimization of steaming system can improve the pore structure to some extent. However, the influence mechanism of evaporation on recycled aggregate concrete (RCA) remains unclear. In this paper, the effects of curing temperature (20°C, 40°C, 60°C and 80°C), steam curing time (6h, 9h and 12h) and pozzolans (slag powder and fly ash) on the compressive strength and pore structure of RAC were studied. The microstructure characteristics such as pore size and pore size distribution were analyzed by the mercury injection porosimetry. The results shown that steam curing can significantly improve the compressive strength and reduce the most probable aperture and average pore sizes of RAC. Moreover, the effect of slag powder on RAC pore structure is better than that of fly ash. And there is a linear correlation between the compressive strength and the average pore size of steam-cured RAC. This can be an important parameter for constructing future steam cured RAC strength prediction models.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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