摘要
为研究水泥-矿粉复合胶凝材料在恒定负温养护环境下的水化程度规律,采用10%、20%、30%的矿粉等量替代硅酸盐水泥,在-5、-10℃负温环境下恒定养护,进行复合胶凝材料在各个龄期的水化热测定、物相分析和热重分析,计算了各龄期的水化程度,并用CEMHYD 3D模型进行水化模拟用以与试验数据相互对比、验证。结果表明:在恒定负温养护条件下,掺入矿粉可以提高复合胶凝材料水化前期的水化程度,对应于不同的养护温度,矿粉掺量存在相应的最优掺量;CEMHYD 3D模型可以较好得模拟负温养护条件下复合胶凝材料的水化进程,但对矿粉水化反应的模拟有些许偏差。
In order to study the hydration degree of cement-mineral powder composite cementitious materials under constant negative temperature curing environment,10%,20%,and 30%of mineral powder were used to replace Portland cement in equal amounts,and the composite cementitious materials were cured at-5℃and-10℃under constant negative temperature environment,and the heat of hydration,physical phase analysis and thermogravimetric analysis were performed at each age to calculate the hydration degree at each age.The hydration of omposite cementitious materials was simulated by CEMHYD 3D model to compare and verify with the experimental data.The results show that the addition of mineral powder can improve the hydration degree of the composite cementitious material at the early stage of hydration under the curing condition of constant negative temperature,and there is a corresponding optimal amount of mineral powder for different maintenance temperatures;the CEMHYD 3D model can better simulate the hydration process of the composite cementitious material under the curing condition of constant negative temperature,but the simulation of the hydration reaction of mineral powder has some deviation.
作者
刘源
王起才
代金鹏
章鑫
毕瑞枭
王坚强
LIU Yuan;WANG Qicai;DAI Jinpeng;ZHANG Xin;BI Ruixiao;WANG Jianqiang(Bridge Engineering National Local Joint Engineering Laboratory of Disaster Prevention and Control Technology,Lanzhou Jiaotong University,Lanzhou 730070,China;Key Laboratory of Road and Bridge and Underground Engineering of Gansu Province,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《混凝土》
CAS
北大核心
2023年第4期7-11,16,共6页
Concrete
基金
国家自然科学基金(51768033,51808272)
长江学者和创新团队发展计划滚动资助项目(IRT_15R29)
甘肃省引导科技创新发展专项-重点研发能力提升项目(2019ZX-09)
兰州交通大学青年科学基金(2017015)。
关键词
负温养护
矿粉
计算机模拟
水化程度
negative temperature curing
slag
computer simulation
degree of hydration
作者简介
第一作者:刘源(1997-),男,硕士研究生,从事水泥基材料研究。联系地址:甘肃省兰州市安宁西路88号(730070)联系电话:18095151007;通讯作者:王起才(1962-),男,教授。联系电话:15835442601。
