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材料导报  2022, Vol. 36 Issue (12): 21040035-6    https://doi.org/10.11896/cldb.21040035
  无机非金属及其复合材料 |
不同养护条件下硫硅酸钙-硫铝酸钙水泥的性能研究
沈燕1,2, 朱航宇1, 王培芳1, 陈玺1, 钱觉时3
1 扬州大学建筑科学与工程学院,江苏 扬州 225127
2 绿色建筑材料国家重点实验室,北京 100000
3 重庆大学材料科学与工程学院,重庆 400045
Study on the Performance of Ternesite-Ye'elimite Cement at Different Curing Conditions
SHEN Yan1,2, ZHU Hangyu1, WANG Peifang1, CHEN Xi1, QIAN Jueshi3
1 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu , China
2 State Key Laboratory of Green Building Materials, Beijing 100000, China
3 College of Material Science and Engineering, Chongqing University, Chongqing 400045, China
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摘要 硫硅酸钙-硫铝酸钙水泥是一种新型低碳胶凝材料,其中硫硅酸钙水化活性的发挥对水泥性能有重要的积极作用。本工作在采用离子掺杂制备硫硅酸钙-硫铝酸钙水泥的基础上,研究了养护温度、湿度对水泥力学性能、体积稳定性以及水化产物的影响。结果表明,水泥熟料的实际矿物组成与理论设计较为一致。40 ℃和60 ℃下养护的水泥强度显著高于20 ℃下的强度,泡水养护下水泥强度明显高于自然养护下水泥强度。养护温度升高会使水泥砂浆的膨胀率增大,但后期水泥砂浆的膨胀趋于稳定,高温下硫硅酸钙的水化不会对体积稳定性造成不利影响。较高的养护温度促进3 d龄期时钙矾石的形成,但60 ℃下钙矾石生成量减少。28 d龄期时不同养护温度下钙矾石生成量相近,自然养护下与泡水条件下钙矾石的变化规律一致。
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沈燕
朱航宇
王培芳
陈玺
钱觉时
关键词:  硫硅酸钙-硫铝酸钙水泥  温度  湿度  强度  水化  钙矾石    
Abstract: Ternesite-ye'elimite cement is a new type of low-carbon binder in which the hydration reactivity of ternesite has a significant effect on cement properties. In this work, ternesite-ye'elimite cement was prepared by adding ion doping. The effect of curing temperature and humidity on the mechanical property, dimensional stability and hydration products of ternesite-ye'elimite cement were investigated. The results indicate that the phase composition of the clinker is close to the target mineralogical composition. The compressive strengths of cement pastes cured at 40 ℃ and 60 ℃ are much higher than those of cement pastes cured at 20 ℃. Compared with air curing, water curing provides cement pastes with higher compresive strengths apparently. Increasing curing temperature results in much higher expansion rate of mortars, but the expansion tends to be constant at later ages, which indicates that the hydration of ternesite at higher temperatures is harmless to the volume stability of ternesite-ye'elimite cement. Higher temperature can promote the ettringite formation at 3 d, but the amount of ettringite decreases in cement pastes cured at 60 ℃. After 28 d of hydration, a similar ettringite formation of cement pastes cured at different temperatures is observed. The cement pastes cured at air and water show a similar ettringite development with ongoing hydration.
Key words:  ternesite-ye'elimite cement    temperature    humidity    strength    hydration    ettringite
出版日期:  2022-06-25      发布日期:  2022-06-24
ZTFLH:  TU525  
基金资助: 国家自然科学基金(51802279);绿色建筑材料国家重点实验室开放基金
通讯作者:  shenyan.q@163.com   
作者简介:  沈燕,扬州大学建筑科学与工程学院教师,2015年毕业于重庆大学材料科学与工程学院,获材料科学与工程专业博士学位。主要研究方向为低碳水泥和固体废弃物资源化利用,重点研究硫硅酸钙-硫铝酸钙新型低碳水泥的制备与性能、硫铝酸盐水泥的改性,负责和参加科研项目10余项,在国内外重要期刊发表论文20多篇。
引用本文:    
沈燕, 朱航宇, 王培芳, 陈玺, 钱觉时. 不同养护条件下硫硅酸钙-硫铝酸钙水泥的性能研究[J]. 材料导报, 2022, 36(12): 21040035-6.
SHEN Yan, ZHU Hangyu, WANG Peifang, CHEN Xi, QIAN Jueshi. Study on the Performance of Ternesite-Ye'elimite Cement at Different Curing Conditions. Materials Reports, 2022, 36(12): 21040035-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21040035  或          http://www.mater-rep.com/CN/Y2022/V36/I12/21040035
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