Alexander German , Frank Winnefeld , Pietro Lura , Daniel Rentsch , Barbara Lothenbach
{"title":"氧化镁/氢菱镁矿混合物中含水镁石(HCB)","authors":"Alexander German , Frank Winnefeld , Pietro Lura , Daniel Rentsch , Barbara Lothenbach","doi":"10.1016/j.cemconres.2023.107304","DOIUrl":null,"url":null,"abstract":"<div><p>The hydration of reactive MgO in presence of hydromagnesite was investigated using analyses of the solid and the liquid phase. A brucite-like phase with low crystallinity was identified as hydration product. A partial destabilization of hydromagnesite was observed and it is suggested that the carbonate was taken up by the brucite-like phase. Furthermore, it was evidenced by thermogravimetry that this phase contained loosely bound “gel water”. Thus, a hypothetical <em>hydrous carbonate</em>-containing <em>brucite</em> (HCB) phase is proposed with a tentative composition MgCO<sub>3</sub>·35Mg(OH)<sub>2</sub>·H<sub>2</sub>O derived from mass balance calculations. Based on the solution chemistry and other considerations, its thermodynamic data were determined. Thermodynamic modeling of the hydrate assemblage of MgO/hydromagnesite blends confirmed the stability of HCB in the presence of hydromagnesite and brucite.</p></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"173 ","pages":"Article 107304"},"PeriodicalIF":10.9000,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0008884623002181/pdfft?md5=1582310352468aefdd44cbe6f6d36966&pid=1-s2.0-S0008884623002181-main.pdf","citationCount":"3","resultStr":"{\"title\":\"Hydrous carbonate-containing brucite (HCB) in MgO/hydromagnesite blends\",\"authors\":\"Alexander German , Frank Winnefeld , Pietro Lura , Daniel Rentsch , Barbara Lothenbach\",\"doi\":\"10.1016/j.cemconres.2023.107304\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The hydration of reactive MgO in presence of hydromagnesite was investigated using analyses of the solid and the liquid phase. A brucite-like phase with low crystallinity was identified as hydration product. A partial destabilization of hydromagnesite was observed and it is suggested that the carbonate was taken up by the brucite-like phase. Furthermore, it was evidenced by thermogravimetry that this phase contained loosely bound “gel water”. Thus, a hypothetical <em>hydrous carbonate</em>-containing <em>brucite</em> (HCB) phase is proposed with a tentative composition MgCO<sub>3</sub>·35Mg(OH)<sub>2</sub>·H<sub>2</sub>O derived from mass balance calculations. Based on the solution chemistry and other considerations, its thermodynamic data were determined. Thermodynamic modeling of the hydrate assemblage of MgO/hydromagnesite blends confirmed the stability of HCB in the presence of hydromagnesite and brucite.</p></div>\",\"PeriodicalId\":266,\"journal\":{\"name\":\"Cement and Concrete Research\",\"volume\":\"173 \",\"pages\":\"Article 107304\"},\"PeriodicalIF\":10.9000,\"publicationDate\":\"2023-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0008884623002181/pdfft?md5=1582310352468aefdd44cbe6f6d36966&pid=1-s2.0-S0008884623002181-main.pdf\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cement and Concrete Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0008884623002181\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cement and Concrete Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0008884623002181","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Hydrous carbonate-containing brucite (HCB) in MgO/hydromagnesite blends
The hydration of reactive MgO in presence of hydromagnesite was investigated using analyses of the solid and the liquid phase. A brucite-like phase with low crystallinity was identified as hydration product. A partial destabilization of hydromagnesite was observed and it is suggested that the carbonate was taken up by the brucite-like phase. Furthermore, it was evidenced by thermogravimetry that this phase contained loosely bound “gel water”. Thus, a hypothetical hydrous carbonate-containing brucite (HCB) phase is proposed with a tentative composition MgCO3·35Mg(OH)2·H2O derived from mass balance calculations. Based on the solution chemistry and other considerations, its thermodynamic data were determined. Thermodynamic modeling of the hydrate assemblage of MgO/hydromagnesite blends confirmed the stability of HCB in the presence of hydromagnesite and brucite.
期刊介绍：
Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.
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