Haoran Wang, Rongsheng Xu, Lu Wei, Jian Lin, Dongping Wu
{"title":"硫酸盐侵蚀下蒸压加气混凝土劣化规律及机理","authors":"Haoran Wang, Rongsheng Xu, Lu Wei, Jian Lin, Dongping Wu","doi":"10.1680/jemmr.23.00047","DOIUrl":null,"url":null,"abstract":"Autoclaved aerated concrete (AAC) is a lightweight porous material, which is widely used as wall material. However, the performance of AAC under sulfate attack is still unclear. Therefore, this experiment investigated the performance changes of AAC with different bulk densities in sodium sulfate solution. Meanwhile, the influence of B05 grade AAC under erosion by sodium sulfate, magnesium sulfate and ammonium sulfate solutions was studied separately, and the degradation degree of its performance in different concentrations of sodium sulfate solution was analyzed. Mass change, relative dynamic modulus of elasticity (<i>E</i> <sub>rd</sub>) and compressive strength, mineral phase and micromorphologies were investigated. The results revealed that <i>E</i> <sub>rd</sub> decreased more obviously with a higher bulk density class, but the variety of the compressive strength was inversed. Moreover, the performances of AAC samples degraded more significantly while they were exposed to sodium sulfate solution. With an increase in sulfate solution concentration, the performance of AAC deteriorated more seriously.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Deterioration law and mechanism of autoclaved aerated concrete under sulfate attack\",\"authors\":\"Haoran Wang, Rongsheng Xu, Lu Wei, Jian Lin, Dongping Wu\",\"doi\":\"10.1680/jemmr.23.00047\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Autoclaved aerated concrete (AAC) is a lightweight porous material, which is widely used as wall material. However, the performance of AAC under sulfate attack is still unclear. Therefore, this experiment investigated the performance changes of AAC with different bulk densities in sodium sulfate solution. Meanwhile, the influence of B05 grade AAC under erosion by sodium sulfate, magnesium sulfate and ammonium sulfate solutions was studied separately, and the degradation degree of its performance in different concentrations of sodium sulfate solution was analyzed. Mass change, relative dynamic modulus of elasticity (<i>E</i> <sub>rd</sub>) and compressive strength, mineral phase and micromorphologies were investigated. The results revealed that <i>E</i> <sub>rd</sub> decreased more obviously with a higher bulk density class, but the variety of the compressive strength was inversed. Moreover, the performances of AAC samples degraded more significantly while they were exposed to sodium sulfate solution. With an increase in sulfate solution concentration, the performance of AAC deteriorated more seriously.\",\"PeriodicalId\":11537,\"journal\":{\"name\":\"Emerging Materials Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2023-10-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Emerging Materials Research\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1680/jemmr.23.00047\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Emerging Materials Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1680/jemmr.23.00047","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Deterioration law and mechanism of autoclaved aerated concrete under sulfate attack
Autoclaved aerated concrete (AAC) is a lightweight porous material, which is widely used as wall material. However, the performance of AAC under sulfate attack is still unclear. Therefore, this experiment investigated the performance changes of AAC with different bulk densities in sodium sulfate solution. Meanwhile, the influence of B05 grade AAC under erosion by sodium sulfate, magnesium sulfate and ammonium sulfate solutions was studied separately, and the degradation degree of its performance in different concentrations of sodium sulfate solution was analyzed. Mass change, relative dynamic modulus of elasticity (Erd) and compressive strength, mineral phase and micromorphologies were investigated. The results revealed that Erd decreased more obviously with a higher bulk density class, but the variety of the compressive strength was inversed. Moreover, the performances of AAC samples degraded more significantly while they were exposed to sodium sulfate solution. With an increase in sulfate solution concentration, the performance of AAC deteriorated more seriously.
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Materials Research is constantly evolving and correlations between process, structure, properties and performance which are application specific require expert understanding at the macro-, micro- and nano-scale. The ability to intelligently manipulate material properties and tailor them for desired applications is of constant interest and challenge within universities, national labs and industry.
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