{"title":"石蜡膨胀蛭石基相变混凝土的制备及其储热性能研究","authors":"Min Li, Yafei Guan","doi":"10.1007/s10973-024-13832-y","DOIUrl":null,"url":null,"abstract":"<div><p>Paraffin-expanded vermiculite (EV) composite PCMs are prepared by using vacuum adsorption method. Paraffin-EV with an adsorption rate of 52 mass% paraffin is selected as phase change aggregate to replace sand in concrete. The chemical structure is characterized by Fourier transform infrared spectrometer (FTIR). The thermal storage performance and thermal reliability of phase change aggregate are characterized by differential scanning calorimeter (DSC) and temperature–time curve. The results show that adsorbing paraffin wax by expanded vermiculite is a physical process. The phase change temperature is 26.1 °C, and the melting enthalpy of the phase change aggregate is 63.7 J g<sup>−1</sup>. The mass loss rate of phase change aggregate is 3.26% after 200 cooling/heating cycles. The peak temperature of cement hydration for phase change aggregate is 26.6 °C, which is 4.1 °C lower than that of concrete without phase change aggregate. The prepared phase change concrete shows good heat storage/release performance.</p></div>","PeriodicalId":678,"journal":{"name":"Journal of Thermal Analysis and Calorimetry","volume":"149 24","pages":"14605 - 14614"},"PeriodicalIF":3.0000,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Study on preparation and heat storage performance of paraffin-expanded vermiculite-based phase change concrete\",\"authors\":\"Min Li, Yafei Guan\",\"doi\":\"10.1007/s10973-024-13832-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Paraffin-expanded vermiculite (EV) composite PCMs are prepared by using vacuum adsorption method. Paraffin-EV with an adsorption rate of 52 mass% paraffin is selected as phase change aggregate to replace sand in concrete. The chemical structure is characterized by Fourier transform infrared spectrometer (FTIR). The thermal storage performance and thermal reliability of phase change aggregate are characterized by differential scanning calorimeter (DSC) and temperature–time curve. The results show that adsorbing paraffin wax by expanded vermiculite is a physical process. The phase change temperature is 26.1 °C, and the melting enthalpy of the phase change aggregate is 63.7 J g<sup>−1</sup>. The mass loss rate of phase change aggregate is 3.26% after 200 cooling/heating cycles. The peak temperature of cement hydration for phase change aggregate is 26.6 °C, which is 4.1 °C lower than that of concrete without phase change aggregate. The prepared phase change concrete shows good heat storage/release performance.</p></div>\",\"PeriodicalId\":678,\"journal\":{\"name\":\"Journal of Thermal Analysis and Calorimetry\",\"volume\":\"149 24\",\"pages\":\"14605 - 14614\"},\"PeriodicalIF\":3.0000,\"publicationDate\":\"2024-11-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Thermal Analysis and Calorimetry\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10973-024-13832-y\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, ANALYTICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Thermal Analysis and Calorimetry","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10973-024-13832-y","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
Study on preparation and heat storage performance of paraffin-expanded vermiculite-based phase change concrete
Paraffin-expanded vermiculite (EV) composite PCMs are prepared by using vacuum adsorption method. Paraffin-EV with an adsorption rate of 52 mass% paraffin is selected as phase change aggregate to replace sand in concrete. The chemical structure is characterized by Fourier transform infrared spectrometer (FTIR). The thermal storage performance and thermal reliability of phase change aggregate are characterized by differential scanning calorimeter (DSC) and temperature–time curve. The results show that adsorbing paraffin wax by expanded vermiculite is a physical process. The phase change temperature is 26.1 °C, and the melting enthalpy of the phase change aggregate is 63.7 J g−1. The mass loss rate of phase change aggregate is 3.26% after 200 cooling/heating cycles. The peak temperature of cement hydration for phase change aggregate is 26.6 °C, which is 4.1 °C lower than that of concrete without phase change aggregate. The prepared phase change concrete shows good heat storage/release performance.
期刊介绍：
Journal of Thermal Analysis and Calorimetry is a fully peer reviewed journal publishing high quality papers covering all aspects of thermal analysis, calorimetry, and experimental thermodynamics. The journal publishes regular and special issues in twelve issues every year. The following types of papers are published: Original Research Papers, Short Communications, Reviews, Modern Instruments, Events and Book reviews.
The subjects covered are: thermogravimetry, derivative thermogravimetry, differential thermal analysis, thermodilatometry, differential scanning calorimetry of all types, non-scanning calorimetry of all types, thermometry, evolved gas analysis, thermomechanical analysis, emanation thermal analysis, thermal conductivity, multiple techniques, and miscellaneous thermal methods (including the combination of the thermal method with various instrumental techniques), theory and instrumentation for thermal analysis and calorimetry.
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