纤维弹性模量对轻骨料混凝土气泡分形维数和耐久性影响

Effect of Fiber Elastic Modulus on Concrete Bubble Fractal Dimension and Frost Durability of Light-weight Aggregate Concrete

本文主要对掺入低弹性模量的聚丙烯纤维和高弹性模量的玻璃纤维之后的混凝土与不掺加纤维混凝土进行对比,通过混凝土硬化孔隙分析仪测得混凝土气泡参数,采用分形思想,对混凝土内部气泡空隙进行数学分形分析,推导分形维数D;对掺入两种不同弹性模量纤维的混凝土的气泡参数进行对比,找出其变化规律以及主要气泡参数与混凝土抗冻耐久性之间的联系。得到可由分形维数D的大小判断轻骨料混凝土耐久性强弱的结论。

This article mainly compares the concrete mixed with low elastic modulus polypropylene fiber and high elastic modulus glass fiber with the concrete mixed with no fiber,measuring concrete bubble parameters by air void analyzer, using fractal theory, analyzes the bubble in the concrete using mathematical fractal analysis,deduces fractal dimension D.It finds out the regularity by comparing with air bubble parameters of two kinds of concrete with different modulus of elasticity,and the connection between air bubble parameters and frost resistance properties of concrete.Preliminary concluding that the strength of durability of light-weight aggregate concrete can be figured out from the size of fractal dimension D.