Xu Linglin, W. Peiming, Zhang Guofang, G. Schutter
{"title":"硫酸钙品种对硅酸盐水泥-铝酸钙水泥共混物强度的影响机理","authors":"Xu Linglin, W. Peiming, Zhang Guofang, G. Schutter","doi":"10.7521/J.ISSN.0454-5648.2013.11.06","DOIUrl":null,"url":null,"abstract":"The influence mechanism of calcium sulfate varieties on the strength of Portland cement-calcium aluminate cement blends were investigated by means of calorimetry, X-ray diffraction, environmental scanning electron microscopy. Results show that the variety of calcium sulfate determines its solubility and dissolution rate, which directly lead to the differences in the formation content,time and size of ettringite(AFt), and affects the volume stability, which finally determines the strength of pastes. When the calcium sulfate dosage is 7.5%, the formation content of AFt firstly increases and then decreases. However, the time when AFt content reaches the maximum and the size of AFt have close relationships with the variety of calcium sulfate. When anhydrite is added, the transit time from AFt to monosulfate is the latest, and the size of AFt is much longer and thinner than those with other calcium sulfate, additionally the AFt content before 8 hours is prominently lower than others, which leads to lower strength. When the calcium sulfate dosage is 15%, secondary gypsum also forms besides AFt, is ten times bigger than AFt. This can lead to the expansion and even complete lost of strength for the systems with hemi-hydrite.","PeriodicalId":35812,"journal":{"name":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"Influence Mechanism of Calcium Sulfate Variety on Strength of Portland Cement-calcium Aluminate Cement Blends\",\"authors\":\"Xu Linglin, W. Peiming, Zhang Guofang, G. Schutter\",\"doi\":\"10.7521/J.ISSN.0454-5648.2013.11.06\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The influence mechanism of calcium sulfate varieties on the strength of Portland cement-calcium aluminate cement blends were investigated by means of calorimetry, X-ray diffraction, environmental scanning electron microscopy. Results show that the variety of calcium sulfate determines its solubility and dissolution rate, which directly lead to the differences in the formation content,time and size of ettringite(AFt), and affects the volume stability, which finally determines the strength of pastes. When the calcium sulfate dosage is 7.5%, the formation content of AFt firstly increases and then decreases. However, the time when AFt content reaches the maximum and the size of AFt have close relationships with the variety of calcium sulfate. When anhydrite is added, the transit time from AFt to monosulfate is the latest, and the size of AFt is much longer and thinner than those with other calcium sulfate, additionally the AFt content before 8 hours is prominently lower than others, which leads to lower strength. When the calcium sulfate dosage is 15%, secondary gypsum also forms besides AFt, is ten times bigger than AFt. This can lead to the expansion and even complete lost of strength for the systems with hemi-hydrite.\",\"PeriodicalId\":35812,\"journal\":{\"name\":\"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2013-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://doi.org/10.7521/J.ISSN.0454-5648.2013.11.06\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Materials Science\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.7521/J.ISSN.0454-5648.2013.11.06","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Materials Science","Score":null,"Total":0}
Influence Mechanism of Calcium Sulfate Variety on Strength of Portland Cement-calcium Aluminate Cement Blends
The influence mechanism of calcium sulfate varieties on the strength of Portland cement-calcium aluminate cement blends were investigated by means of calorimetry, X-ray diffraction, environmental scanning electron microscopy. Results show that the variety of calcium sulfate determines its solubility and dissolution rate, which directly lead to the differences in the formation content,time and size of ettringite(AFt), and affects the volume stability, which finally determines the strength of pastes. When the calcium sulfate dosage is 7.5%, the formation content of AFt firstly increases and then decreases. However, the time when AFt content reaches the maximum and the size of AFt have close relationships with the variety of calcium sulfate. When anhydrite is added, the transit time from AFt to monosulfate is the latest, and the size of AFt is much longer and thinner than those with other calcium sulfate, additionally the AFt content before 8 hours is prominently lower than others, which leads to lower strength. When the calcium sulfate dosage is 15%, secondary gypsum also forms besides AFt, is ten times bigger than AFt. This can lead to the expansion and even complete lost of strength for the systems with hemi-hydrite.
期刊介绍:
Journal of the Chinese Ceramic Society was founded in 1957 and published scientific research papers in Chinese or English for Chinese and English academic journals (16 journals). Journal of silicate is a core journal in Chinese, double-effect journal, Chinese excellent scientific journals, 100 outstanding Chinese academic journals, Chinese Association of Science and Technology excellent scientific journals (Category B).