Wan Zhang, Zhihong Wu, Wang Huang, Jiawei Wang, Yuexin Pan, Zhishun Li, Shufang Ren, Hongjin Xu
{"title":"Accelerating strength development of cementitious mixtures using aluminum sulfate liquid accelerator with aluminium formate","authors":"Wan Zhang, Zhihong Wu, Wang Huang, Jiawei Wang, Yuexin Pan, Zhishun Li, Shufang Ren, Hongjin Xu","doi":"10.1680/jmacr.23.00170","DOIUrl":null,"url":null,"abstract":"The alkali-free liquid accelerator (ALSF) was prepared with aluminum sulfate and aluminum formate as the main components. The effects of ALSF on the setting of paste and the mechanical strength of mortar were studied, and the impact of ALSF on the early hydration behavior and hydration products of paste were investigated by isothermal calorimeter analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric (TG) analysis. The results show that ALSF is excellent for the rapid setting and hardening of the cement. When the content of ALSF was 8 wt%, the initial setting time and final setting time of paste were 85 s and 180 s, respectively, and the 1 d and 28 d strengths of mortar were 9.52 MPa and 44.42 MPa, respectively. ALSF can accelerate the dissolution and hydration of C3A and C3S and promote the formation of 3CaO·Al2O3·3CaSO4·32H2O (ettringite), AFt formate, and portlandite.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":"42 12","pages":""},"PeriodicalIF":17.7000,"publicationDate":"2024-01-23","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/jmacr.23.00170","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The alkali-free liquid accelerator (ALSF) was prepared with aluminum sulfate and aluminum formate as the main components. The effects of ALSF on the setting of paste and the mechanical strength of mortar were studied, and the impact of ALSF on the early hydration behavior and hydration products of paste were investigated by isothermal calorimeter analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric (TG) analysis. The results show that ALSF is excellent for the rapid setting and hardening of the cement. When the content of ALSF was 8 wt%, the initial setting time and final setting time of paste were 85 s and 180 s, respectively, and the 1 d and 28 d strengths of mortar were 9.52 MPa and 44.42 MPa, respectively. ALSF can accelerate the dissolution and hydration of C3A and C3S and promote the formation of 3CaO·Al2O3·3CaSO4·32H2O (ettringite), AFt formate, and portlandite.
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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