| 纳米级SiO2改性水泥胶砂作用机理研究 |
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| 引用本文： | 徐子芳,王君,张明旭.纳米级SiO2改性水泥胶砂作用机理研究[J].硅酸盐通报,2007,26(1):58-62,216. |
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| 作者姓名： | 徐子芳 王君 张明旭 |
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| 作者单位： | 安徽理工大学材料科学与工程系,淮南,232001 |
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| 基金项目： | 安徽省教育厅自然基金资助项目(2006KJ025C)，安徽理工大学硕、博基金资助项目 |
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| 摘 要： | 用XRD、TGA-DTA分析了纳米级SiO2改性水泥砂浆后的水泥基材料的性能变化,探索了纳米级SiO2的改性机理。XRD、TGA-DTA分析表明水泥砂浆被改性后,Ca(OH)2晶体取向程度降低,晶粒细化且呈无定型。改性后水化产物增多,导致强度增大。除了进行微观力学性能测试之外,用SEM测试评价了纳米级SiO2改性水泥砂浆后的微观形貌,发现在水泥基中添加纳米级SiO2能使水化速率增快,水化产物增多,龄期结构变得致密,导致强度增大,耐久性提高。
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| 关 键 词： | 纳米SiO2 改性 机理研究 XRD、TGA-DTA分析 SEM观察 |
Research on Reaction Mechanism of Cement-Motar by Nano-SiO2 |
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| XU Zi-fang,WANG Jun,ZHANG Ming-xu.Research on Reaction Mechanism of Cement-Motar by Nano-SiO2[J].Bulletin of the Chinese Ceramic Society,2007,26(1):58-62,216. |
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| Authors: | XU Zi-fang WANG Jun ZHANG Ming-xu |
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| Affiliation: | Department of Materials Science and Engineering , Anhui University of Science and Technology, Huainan 232001, China |
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| Abstract: | The characteristics of nano-SiO2 powder investigated with XRD and TGA-DTA fo r cementing composite materials were discussed and the mechanism were quested. T he result of XRD and TGA-DTA test show that, cementing composite materials were modified, and Ca(OH)2 crystal degree of orientation decreases , crystal gra in subdivides and shows itself amorphism . After modified, the hydration product s increase and results to the increasing of the strength. The microstructure of the modified cementing composite materials was evaluated with SEM testing beside s the testing of micro mechanics property. The result shows, after adding nano- SiO2 to cementing composite materials the hydration speed accelerates, the hyd ration products increase, the stadium structure gets tight, and the intensity st rengthened. |
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| Keywords: | nano-SiO2 modify mechanism research XRD TGA-DTA analyse SEM observation |
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