Fabio Enrico Furcas, Alexander German, Frank Winnefeld, Pietro Lura, Ueli Angst
{"title":"氧化镁/氢镁砂砂浆的耐久性评价——抗氯化物和耐腐蚀性能","authors":"Fabio Enrico Furcas, Alexander German, Frank Winnefeld, Pietro Lura, Ueli Angst","doi":"10.1617/s11527-025-02765-z","DOIUrl":null,"url":null,"abstract":"<div><p>The durability of MgO/hydromagnesite mortars was studied with respect to their corrosion performance and resistance to chloride attack and moisture. Rapid chloride ingress measurements showed chloride migration coefficients of <span>\\({D}_{\\text{Cl}}={1\\times 10}^{-13}\\)</span> to <span>\\({1\\times 10}^{-12}\\)</span> <span>\\({\\text{m}}^{2}/{\\text{s}}\\)</span>. MgO/hydromagnesite pastes were cured in alkaline chloride solution to investigate the formation of Mg-chlorides; however, no such phases were observed. The corrosion rate of carbon steel embedded in MgO/HY mortars, as determined by linear polarization resistance measurements, was in the range <span>\\({i}_{\\text{corr}}=1\\times {10}^{-9}\\)</span> <span>\\(\\text{A/}{\\text{cm}}^{2}\\)</span> in dry and <span>\\(1\\times {10}^{-7}\\)</span> <span>\\(\\text{A/}{\\text{cm}}^{2}\\)</span> in wet conditions, irrespective of the mortar composition or curing condition. These findings corroborate the hypothesis that, in the absence of chlorides, the moisture condition is the primary predictor of corrosion rate of carbon steel in the MgO/hydromagnesite binder. These accelerated, short-term experiments suggest that the binder may be suited to protect embedded carbon steel from corrosion under specific exposure conditions of practical relevance.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 8","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-025-02765-z.pdf","citationCount":"0","resultStr":"{\"title\":\"Durability assessment of MgO/hydromagnesite mortars—Resistance to chlorides and corrosion\",\"authors\":\"Fabio Enrico Furcas, Alexander German, Frank Winnefeld, Pietro Lura, Ueli Angst\",\"doi\":\"10.1617/s11527-025-02765-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The durability of MgO/hydromagnesite mortars was studied with respect to their corrosion performance and resistance to chloride attack and moisture. Rapid chloride ingress measurements showed chloride migration coefficients of <span>\\\\({D}_{\\\\text{Cl}}={1\\\\times 10}^{-13}\\\\)</span> to <span>\\\\({1\\\\times 10}^{-12}\\\\)</span> <span>\\\\({\\\\text{m}}^{2}/{\\\\text{s}}\\\\)</span>. MgO/hydromagnesite pastes were cured in alkaline chloride solution to investigate the formation of Mg-chlorides; however, no such phases were observed. The corrosion rate of carbon steel embedded in MgO/HY mortars, as determined by linear polarization resistance measurements, was in the range <span>\\\\({i}_{\\\\text{corr}}=1\\\\times {10}^{-9}\\\\)</span> <span>\\\\(\\\\text{A/}{\\\\text{cm}}^{2}\\\\)</span> in dry and <span>\\\\(1\\\\times {10}^{-7}\\\\)</span> <span>\\\\(\\\\text{A/}{\\\\text{cm}}^{2}\\\\)</span> in wet conditions, irrespective of the mortar composition or curing condition. These findings corroborate the hypothesis that, in the absence of chlorides, the moisture condition is the primary predictor of corrosion rate of carbon steel in the MgO/hydromagnesite binder. These accelerated, short-term experiments suggest that the binder may be suited to protect embedded carbon steel from corrosion under specific exposure conditions of practical relevance.</p></div>\",\"PeriodicalId\":691,\"journal\":{\"name\":\"Materials and Structures\",\"volume\":\"58 8\",\"pages\":\"\"},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2025-09-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1617/s11527-025-02765-z.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials and Structures\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1617/s11527-025-02765-z\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials and Structures","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1617/s11527-025-02765-z","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Durability assessment of MgO/hydromagnesite mortars—Resistance to chlorides and corrosion
The durability of MgO/hydromagnesite mortars was studied with respect to their corrosion performance and resistance to chloride attack and moisture. Rapid chloride ingress measurements showed chloride migration coefficients of \({D}_{\text{Cl}}={1\times 10}^{-13}\) to \({1\times 10}^{-12}\)\({\text{m}}^{2}/{\text{s}}\). MgO/hydromagnesite pastes were cured in alkaline chloride solution to investigate the formation of Mg-chlorides; however, no such phases were observed. The corrosion rate of carbon steel embedded in MgO/HY mortars, as determined by linear polarization resistance measurements, was in the range \({i}_{\text{corr}}=1\times {10}^{-9}\)\(\text{A/}{\text{cm}}^{2}\) in dry and \(1\times {10}^{-7}\)\(\text{A/}{\text{cm}}^{2}\) in wet conditions, irrespective of the mortar composition or curing condition. These findings corroborate the hypothesis that, in the absence of chlorides, the moisture condition is the primary predictor of corrosion rate of carbon steel in the MgO/hydromagnesite binder. These accelerated, short-term experiments suggest that the binder may be suited to protect embedded carbon steel from corrosion under specific exposure conditions of practical relevance.
期刊介绍:
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.