{"title":"无水 CSA 水泥的相定量:X 射线衍射和拉曼成像相结合的方法","authors":"Chirayu Kothari, Nishant Garg","doi":"10.1680/jadcr.23.00238","DOIUrl":null,"url":null,"abstract":"Calcium Sulfoaluminate (CSA) cements are known for their special properties, such as shrinkage compensation and high early-age strength. These properties are dependent on the hydrated phase assemblage, which in turn is governed by the phases present in the initial anhydrous cement. However, the anhydrous CSA phase quantification via XRD Rietveld can be challenging due to the presence of overlapping peaks, polymorphs, and preferred orientation. To overcome this problem, an approach involving high-resolution large-area Raman imaging (5mm x 5mm, 250,000 pixels, with 10 μm/pixel resolution) complemented by XRD analysis is introduced. This integrated approach of combined XRD and Raman Imaging is found to be crucial in the initial identification of phases that are present in a CSA system. Most importantly, quantitative analysis shows a strong correlation (R2 > 0.99) and agreement (variation < 5 wt.%) between the two independent methods, adding confidence and reliability to the phase assemblage obtained by this dual technique approach.","PeriodicalId":7299,"journal":{"name":"Advances in Cement Research","volume":null,"pages":null},"PeriodicalIF":1.4000,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Phase quantification of anhydrous CSA cements: a combined X-ray diffraction and Raman imaging approach\",\"authors\":\"Chirayu Kothari, Nishant Garg\",\"doi\":\"10.1680/jadcr.23.00238\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Calcium Sulfoaluminate (CSA) cements are known for their special properties, such as shrinkage compensation and high early-age strength. These properties are dependent on the hydrated phase assemblage, which in turn is governed by the phases present in the initial anhydrous cement. However, the anhydrous CSA phase quantification via XRD Rietveld can be challenging due to the presence of overlapping peaks, polymorphs, and preferred orientation. To overcome this problem, an approach involving high-resolution large-area Raman imaging (5mm x 5mm, 250,000 pixels, with 10 μm/pixel resolution) complemented by XRD analysis is introduced. This integrated approach of combined XRD and Raman Imaging is found to be crucial in the initial identification of phases that are present in a CSA system. Most importantly, quantitative analysis shows a strong correlation (R2 > 0.99) and agreement (variation < 5 wt.%) between the two independent methods, adding confidence and reliability to the phase assemblage obtained by this dual technique approach.\",\"PeriodicalId\":7299,\"journal\":{\"name\":\"Advances in Cement Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2024-06-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advances in Cement Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1680/jadcr.23.00238\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Cement Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1680/jadcr.23.00238","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Phase quantification of anhydrous CSA cements: a combined X-ray diffraction and Raman imaging approach
Calcium Sulfoaluminate (CSA) cements are known for their special properties, such as shrinkage compensation and high early-age strength. These properties are dependent on the hydrated phase assemblage, which in turn is governed by the phases present in the initial anhydrous cement. However, the anhydrous CSA phase quantification via XRD Rietveld can be challenging due to the presence of overlapping peaks, polymorphs, and preferred orientation. To overcome this problem, an approach involving high-resolution large-area Raman imaging (5mm x 5mm, 250,000 pixels, with 10 μm/pixel resolution) complemented by XRD analysis is introduced. This integrated approach of combined XRD and Raman Imaging is found to be crucial in the initial identification of phases that are present in a CSA system. Most importantly, quantitative analysis shows a strong correlation (R2 > 0.99) and agreement (variation < 5 wt.%) between the two independent methods, adding confidence and reliability to the phase assemblage obtained by this dual technique approach.
期刊介绍:
Advances in Cement Research highlights the scientific ideas and innovations within the cutting-edge cement manufacture industry. It is a global journal with a scope encompassing cement manufacture and materials, properties and durability of cementitious materials and systems, hydration, interaction of cement with other materials, analysis and testing, special cements and applications.