| 聚合物改性水泥混凝土集料分形特征研究 |
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| 引用本文： | 訚伟,朱婧,徐方,王定鹏,高攀.聚合物改性水泥混凝土集料分形特征研究[J].人民长江,2016,47(18):88. |
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| 作者姓名： | 訚伟 朱婧 徐方 王定鹏 高攀 |
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| 作者单位： | 1. 中国地质大学(武汉)工程学院,湖北武汉,430074;2. 湖北交通职业技术学院,湖北武汉,430079 |
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| 基金项目： | 国家自然科学基金项目(51308518)，湖北交通职业技术学院科研项目(201515)，中国地质大学(武汉)国家级大学生创新创业训练项目(201510491113) |
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| 摘 要： | 利用分形几何学原理对集料分形特征进行分析,研究了分数维与聚合物改性水泥混凝土(PMCC)集料级配、振实空隙率、强度及刚度性能的相关联系。研究结果表明,分数维与集料级配、空隙率具有较好的线性关系;分数维与PMCC强度、刚度性能的内在联系并不明显,但当分数维D为2.394时,PMCC的抗折强度与折压比均出现最大值,D≥2.394时,其弹性模量减小幅度显著增加。利用集料分数维实现对集料级配及PMCC性能的定量描述,可为PMCC的组成设计与性能研究提供一种新方法。
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| 关 键 词： | 集料级配 折压比 分形维数 聚合物改性混凝土 |
Research on aggregate fractal characteristics of polymer-modified cement concrete |
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| Abstract: | Based on fractal geometry theory, the relationship between fractal dimension and the aggregate gradation, porosity, elastic modulus and strength property of polymer-modified cement concrete (PMCC) are analyzed. The research results indicate that fractal dimension has a good linear relationship with aggregate gradation and porosity while the relevance between fractal dimension and other factors, such as elastic modulus and strength property, is not obvious. However, when the fractal dimension D value is 2.394, the PMCC has the highest flexural strength and bend-press ratio; when D value is not less than 2.394, the elastic modulus of PMCC has a significant reduction. Fractal dimension can be effectively utilized to quantitatively describe aggregate gradation and the performance of PMCC, which can provide a new method for the composition design and the property research of PMCC. |
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| Keywords: | aggregate gradation bend-press ratio fractal dimension PMCC |
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