| 摘要: |
| 采用手工搅拌、高速研磨搅拌以及高速研磨搅拌加超声波震荡这3种方法对纳米SiO2进行分散处理，研究了不同处理方式下纳米SiO2对水泥浆体性能的影响.用扫描电镜(SEM)观测了浆体微观结构，并采用紫外可见分光光度法测定了在不同分散方法下纳米SiO2的分散程度.结果表明，采用后2种方法处理的纳米SiO2分散程度更高，可大幅提高水泥砂浆的抗压、抗折强度，使砂浆水化产物结构均匀，更密实. |
| 关键词: 分散方法 纳米SiO2 水泥基材料 紫外可见分光光度法 水泥砂浆强度 微观结构 |
| DOI：10.3969/j.issn.1007 9629.2012.04.010 |
| 分类号: |
| 基金项目:广西自然科学基金资助项目(桂科自0481003)；广西科技开发项目(桂科攻1114016 6)；广西工学院科学研究基金资助项目(030103) |
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| Research on the Microstructure and Performance of the Cement Based Materials by the Stirring Method of Nanometer SiO2 |
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DONG Jian miao1, LIU Chen2, LONG Shi zong3
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1.College of Civil Engineering, Guangxi University of Technology, Liuzhou 545006, China;2.China Building Materials Academy, Beijing 100024, China;3.School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
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| Abstract: |
| Manual stirring, high speed grind stirring, high speed grind stirring with ultrasonic were used to disperse nanometer SiO2. The influence of cement paste by nanometer SiO2 on different stirring methods was studied.In order to investigate the microstructure and performance of cement based materials, SEM was used to observe the microstructure of paste and the UV vis spectrophotometry was used to study the dispersion degree of nanometer SiO2. The results show that if the dispersion degree of nanometer SiO2 are higher, the flexural strength and compressive strength are much higher obviously, and the structure of C S H is more homogeneous and the density is much denser, for the samples with the two latter stirring methods. |
| Key words: stirring method nanometer SiO2 cement based material UV vis spectrophotometry cement mortar strength microstructure |
