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.
出处
《人民长江》
北大核心
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)
