| 脂肪族高效减水剂对水泥水化的微观作用机理 |
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| 引用本文： | 吴晓明,邓敏,赵晖,刘冠国.脂肪族高效减水剂对水泥水化的微观作用机理[J].混凝土,2008(5):75-79. |
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| 作者姓名： | 吴晓明 邓敏 赵晖 刘冠国 |
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| 作者单位： | 1. 江苏交通科学研究院,江苏南京,211112
2. 南京工业大学材料科学与工程学院,江苏南京,210004 |
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| 摘 要： | 通过运用现代测试分析方法(RD、XRD,SEM、TG-DTA)研究了脂肪族高效减水剂对水泥水化和水泥微观结构的影响.结果分析表明,脂肪族高效减水剂能够显著有效降低水泥硬化过程中的孔隙率和孔径,改善孔的结构分布,在加入SAF减水剂1d水泥初期水化速度较慢,28d以后加入脂肪族减水剂的水泥熟料的水化程度与不加脂肪族减水剂的水泥熟料的水化程度逐渐相同.28d掺加SAF减水剂的水泥石SEM显示内部结构均匀致密、大孔减少,有大量的C-S-H凝胶生成,提高了混凝土结构的强度与耐久性.
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| 关 键 词： | 脂肪族 高效减水剂 水泥水化 微观结构 机理 |
| 文章编号： | 1002-3550(2008)05-0075-05 |
| 修稿时间： | 2008年1月7日 |
Influence of aliphatic-based high water-reducer on hydration of cement pastes |
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| WU Xiao-ming,DENG Min,ZHAO Hui,LIU Guan-guo.Influence of aliphatic-based high water-reducer on hydration of cement pastes[J].Concrete,2008(5):75-79. |
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| Authors: | WU Xiao-ming DENG Min ZHAO Hui LIU Guan-guo |
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| Affiliation: | WU Xiao-ming1,DENG Min2,ZHAO Hui1,LIU Guan-guo1(1.Jiangsu Transportation Research Institute,Nanjing 211112,China,2.College of Materials Science , Engineering,Nanjing University of Technology,Nanjing 210004,China) |
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| Abstract: | Aliphatic formaldehyde condensate(SAF) high ranger water-reducer on cement hydration and hydrated pastes microstructure is discussed by applying MIP,XRD,SEM,TG-DTA testing means.The results show that the ratio of porosity was reduced,pore diameter of cement paste and pore size distribution were improved remarkably with adding SAF.The SAF molecules are adsorbed on the cementitious system reducing the crystallization rate of ettringite at 1d.However,SAF molecules can not block the development of ettringite cr... |
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| Keywords: | aliphatic high range water-reducer cement hydration microstructure mechanism |
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