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.
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.
作者
胡传林
陶永征
TARIQ Jamil
BISHNU Gautam
王发洲
HU Chuanlin;TAO Yongzheng;TARIQ Jamil;BISHNU Gautam;WANG Fazhou(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;International School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Department of Mechanical Engineering,NED University of Engineering and Technology,Karachi 74200,Pakistan;Nepal Academy of Science and Technology,Lalitpur 44700,Nepal)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2023年第2期179-185,220,共8页
Journal of Building Materials
基金
“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)。
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
supplementary cementitious material
calcined clay
reactivity
reaction temperature
alkali content
calcination temperature
kaolinite content
