| 摘要: |
| 用分形维数来表征轻集料混凝土界面的粗糙度，运用分形理论分析研究了界面分形维数与混凝土力学性能的关系；用灰色关联分析方法研究轻集料颗粒群特征参数与界面分形维数的关系，以此来确定轻集料颗粒群特征参数对轻集料混凝土界面性质的影响.结果表明：轻集料混凝土界面分形维数越大，界面越粗糙，界面黏结力越大，轻集料混凝土的力学性能越好；对界面分形维数影响程度较大的轻集料颗粒群参数为颗粒群比表面积和颗粒长宽比；当颗粒群比表面积取540~630m2/m3且颗粒长宽比取1.32~1.33时，轻集料混凝土的界面分形维数比较大，有更好的力学性能. |
| 关键词: 轻集料 颗粒群特征 界面性质 灰色关联分析 |
| DOI：10.3969/j.issn.1007 9629.2012.05.005 |
| 分类号: |
| 基金项目:“十一五”国家科技支撑计划项目（2006BAF02A00） |
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| Effects of Characteristics of Particle Group of Lightweight Aggregate on Interface Properties of Lightweight Concrete |
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ZHANG Xiong, CHANG Sheng, ZHANG Yong juan, ZHOU Yun
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School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
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| Abstract: |
| Fractal theory was adopted to measure the interfacial roughness of lightweight concrete. The roughness represented by fractal dimension and its relation to the mechanical properties of lightweight concrete was studied. The relation between the characteristics of particle group of lightweight aggregates and interfacial roughness fractal dimension was studied with grey correlation analysis method. Then the effect of characteristics of particle group of lightweight aggregates on interface properties of lightweight concrete was analyzed. The results show that the interfacial roughness shows great effect on the mechanical properties of lightweight concrete. The specific surface area and aspect of particle group have greater influence on the interfacial roughness of lightweight concrete. When the specific surface area of particle group is between 540m2/m3 to 630m2/m3 and aspect of particle group is 1.32 to 1.33, the interface and mechanical properties of lightweight concrete are better. |
| Key words: lightweight aggregate characteristic of particle group interface property grey correlation analysis method |
