聚合物改性水泥混凝土集料分形特征研究  

Research on aggregate fractal characteristics of polymer-modified cement concrete

作　　者：訚伟 朱婧[2] 徐方[1] 王定鹏 高攀[1] 

机构地区：[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

出　　处：《人民长江》2016年第18期88-91,95,共5页Yangtze River

基　　金：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)

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。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.

关 键 词：集料级配 折压比 分形维数 聚合物改性混凝土 

分 类 号：TV431[水利工程—水工结构工程]