硝酸锌对高铝水泥早期水化产物的影响  

Early hydration performance and hydration products of the high-alumina cement with zinc nitrate

作　　者：王景然[1] 陈鑫铭 何雨珊 陈金纯 董婷婷 马保国[2] WANG Jingran;CHEN Xinming;HE Yushan;CHEN Jinchun;DONG Tingting;MA Baoguo(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070

出　　处：《混凝土》2021年第4期74-77,共4页Concrete

基　　金：国家自然科学基金资助项目(51802235);武汉理工大学硅酸盐国家重点实验室(SYSJJ2015-07);省级大学生创新创业训练计划项目(S202010488068)。

摘　　要：通过XRD、TG-DSC和SEM等方法,研究硝酸锌(0.5%、1.0%、1.5%)对高铝水泥凝结时间、水化热及水化产物的影响。结果表明:0.5%的硝酸锌对高铝水泥水化有明显缓凝作用,而1.5%的硝酸锌有明显的促凝作用。高铝水泥前3 h的水化放热速率,随硝酸锌掺量的增加而增加,随时间的延长而缓慢下降。高铝水泥中添加1.5%硝酸锌后,1 d的水化产物中CAH10和C2AH8明显减少,立方粒状的C3AH6有所增多,Zn均匀的分布在疏松的水化产物表面。The effects of zinc nitrate(0.5%,1.0%,and 1.5%)on setting time,heat of hydration and mechanical properties of the high-alumina cement were studied by XRD,TG-DSC and SEM.Results showed with 0.5% zinc nitrate,the hydration and hardening of slag is delayed.With 1.5% zinc nitrate,the hydration and hardening of slag is accelerated obviously.In the first 3 h,the heat flow of slag was increased with the zinc nitrate was more added.It found that in the hydration products at 1 d of slag adding 1.5% zinc nitrate,the CAH10 and C2 AH8 significantly were significantly reduced,while the cubic granular C3 AH6 was increased.The zinc was uniform distributed on the surface of the loose hydration products.

关 键 词：高铝水泥 硝酸锌 水化 

分 类 号：TU528.041[建筑科学—建筑技术科学]