| 摘要: |
| 采用煅烧黏土在碱性溶液中的反应热试验，探明了氢氧化钙含量、反应温度、煅烧温度和高岭石含量等因素对煅烧黏土反应活性的影响规律及其机理.结果表明：反应热试验能够实现煅烧黏土反应活性的快速表征，且累计放热量与黏土中高岭石含量具有良好的线性相关性；随着煅烧温度的升高，黏土颗粒逐渐破碎，结构无序化程度增大，反应活性出现并逐渐增长到峰值，随后黏土颗粒粒径进一步增大，导致反应活性显著下降. |
| 关键词: 辅助性胶凝材料 煅烧黏土 反应活性 反应温度 碱含量 煅烧温度 高岭石含量 |
| DOI：10.3969/j.issn.1007-9629.2023.02.010 |
| 分类号:U414.1 |
| 基金项目:“十三五”国家重点研发计划-政府间国际科技创新合作重点专项（2018YFE0106300）；武汉市科技计划项目（2020020601012279） |
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| Reactivity of Calcined Clay and Its Influence Mechanism |
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HU Chuanlin1, TAO Yongzheng1,2, TARIQ Jamil3, BISHNU Gautam4, WANG Fazhou1
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1.State Key Laboratory of Silicate Materials for Architectures， Wuhan University of Technology， Wuhan 430070， China;2.International School of Materials Science and Engineering， Wuhan University of Technology， Wuhan 430070， China;3.Department of Mechanical Engineering， NED University of Engineering and Technology， Karachi 74200，Pakistan;4.Nepal Academy of Science and Technology， Lalitpur 44700， Nepal
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| Abstract: |
| Through the reaction heat release of calcined clay in alkaline solution， the influence rule and mechanism concerning calcium hydroxide content，reaction temperature， calcination temperature and kaolinite content on the reactivity of calcined clay were investigated. Results show that the reactivity of calcined clay can be easily characterized by the reaction heat release analysis， and there is a good linear correlation between the cumulative heat release and the kaolinite content of the clay. With the increase of calcination temperature， the clay particles are broken， the degree of structural disorder increases， and the reaction begins and gradually accelerates to its peak，then the clay particle size further increases and the reactivity decreases significantly. |
| Key words: supplementary cementitious material calcined clay reactivity reaction temperature alkali content calcination temperature kaolinite content |
