水泥-石灰石粉胶凝材料体系水化放热规律研究  

Study on the hydration exothermic law of cement-limestone powder cementitious material system

作　　者：朱鹏飞 余熠[1] 石研然[1] 徐菲 何旸[1] 蒋林华[2] 储洪强[2] 徐宁[1] 徐天磊 ZHU Pengfei;YU Yi;SHI Yanran;XU Fei;HE Yang;JIANG Linhua;CHU Hongqiang;XU Ning;XU Tianlei(Nanjing Hydraulic Research Institute,Materials&Structural Research Institute,Nanjing 210024,China;College of Mechanics and Materials,Hohai University,Nanjing 211100,China)

机构地区：[1]南京水利科学研究院材料结构研究所,江苏南京210024 [2]河海大学力学与材料学院,江苏南京211100

出　　处：《混凝土与水泥制品》2024年第12期33-36,共4页China Concrete and Cement Products

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(Y422007、Y420017、Y422001)。

摘　　要：研究了石灰石粉细度(比表面积分别为218、448、596 m^(2)/kg)、水胶比(0.40、0.45、0.50)、水化温度(20℃、40℃)对胶凝材料体系水化进程的影响,并分析了石灰石粉的作用机理。结果表明:在20℃水化温度下,石灰石粉发挥填充、稀释、成核效应,随着石灰石粉掺量的增加,胶凝材料体系的水化放热速率峰值不断降低,诱导期结束时间基本提前;适当降低石灰石粉细度能促进胶凝材料体系的水化进程,但降低水胶比则起相反作用;适当升高水化温度可有效激发石灰石粉的水化活性,加速其火山灰效应,促进胶凝材料体系的水化进程。The effects of the fineness of limestone powder(specific surface area of 218,448,596 m^(2)/kg,respectively),the water-binder ratio(0.40,0.45,0.50),and the hydration temperature(20℃,40℃)on the hydration process of the cementitious material system were investigated,and the mechanism of the limestone powder was analyzed.The results show that,under the hydration temperature of 20℃,limestone powder plays the filling effect,dilution effect and nucleation effect,with the increase of the content of limestone powder,the peak value of the hydration exothermic rate of the cementitious material system decreases,and the terminal time of the induction period is basically in advance.Appropriate reduction of limestone powder fineness can promote the hydration process of cementitious material system,but reducing the water-binder ratio works in the opposite way.Appropriately elevating the hydration temperature can effectively stimulate the hydration activity of limestone powder,accelerate its volcanic ash effect,and promote the hydration process of cementitious material system.

关 键 词：水泥基材料 石灰石粉 水胶比 水化热 水化温度 等温量热 

分 类 号：TU528.04[建筑科学—建筑技术科学]