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| 聚羧酸减水剂对不同晶型C3S早期水化放热的影响 | |
| 引用本文： | 谭立心,罗超云,弓子成,黄修林,丁庆军.聚羧酸减水剂对不同晶型C3S早期水化放热的影响[J].武汉理工大学学报,2012,34(6):10-16. |
| 作者姓名： | 谭立心 罗超云 弓子成 黄修林 丁庆军 |
| 作者单位： | 1. 长沙理工大学土木与建筑学院,长沙410015;广东省长大公路工程有限公司,广州511430 2. 广东省长大公路工程有限公司,广州,511430 3. 武汉理工大学材料科学与工程学院,武汉,430070 4. 湖北大学材料科学与工程学院,武汉,430062 |
| 基金项目： | 国家重点基础研究发展计划(973计划) |
| 摘 要： | 采用水化微量热仪研究了不同类型聚羧酸减水剂对不同晶型C3S水化放热特性的影响。结果表明:单斜晶系(M)C3S、三方晶系(R)C3S的水化放热速率峰值相比三斜晶系(T)C3S显著降低,且水化放热峰出现延迟,MC3S的水化放热峰延迟最明显。三种晶型C3S的3d水化放热总量由大到小为:TC3S、MC3S、RC3S。不同分子结构的甲氧基聚乙二醇甲基丙烯酸酯系聚羧酸减水剂,主链越短,支链越长,对TC3S的水化延迟作用越大。乙烯基聚乙二醇醚系聚羧酸减水剂对三种晶型C3S的水化放热过程延迟作用由大到小为:RC3S、MC3S、TC3S。对水化放热曲线进行的Krstulovic-Dabic模型研究表明,C3S的水化过程为NG-D类型水化历程。 |
| 关 键 词： | 聚羧酸减水剂 C3S 水化放热 |
Effect of Superplasticizer on Early Hydration Property of Different Tricalcium Silicate Polymorphs |
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| TAN Li-xin , LUO Chao-yun , GONG Zi-cheng , HUANG Xiu-lin , DING Qing-jun.Effect of Superplasticizer on Early Hydration Property of Different Tricalcium Silicate Polymorphs[J].Journal of Wuhan University of Technology,2012,34(6):10-16. | |
| Authors: | TAN Li-xin LUO Chao-yun GONG Zi-cheng HUANG Xiu-lin DING Qing-jun |
| Affiliation: | 1.School of Civil Engineering and Architecture,Changsha University of Science & Technology, Changsha 410015,China;2.Guangdong Provincial Changda Highway Engineering Co Ltd, Guangzhou 511430,China;3.School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;4.School of Materials Science and Engineering, Hubei University,Wuhan 430062,China) |
| Abstract: | Effect of superplasticizer on hydration exothermic of different tricalcium silicate polymorphs has been studied in this paper by using Isothermal Calorimetry.The results show that MC3S,RC3S hydration heat release rate peak was significantly lower than TC3S,and the heat of hydration of MC3S especially delays.The 3 d total of hydration heat release of three C3S polymorphs as follow: TC3S,MC3S,RC3S.The shorter of main chain length or the longer of branch chains length in methoxy polyethylene glycol-methacrylates-based polycarboxylate molecule,the stronger of the delay in TC3S hydration within 3 days.When samples doped with vinyl-poly(ethylene glycol)-based polycarboxylate superplasticizer,the hydration exothermic of different tricalcium silicate polymorphs delays to a certain extent,The most obvious is RC3S.The study of Krstulovic-Dabic model shows that the dynamics process of C3S is the NG-D type. |
| Keywords: | polycarboxylate superplasticizer tricalcium silicate hydration exothermic |
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