摘要
粘弹性材料的沥青混合料是一种典型的粘、弹、塑性综合体,粘弹性是其基本的力学特征。研究沥青混合料的粘弹性,通常采用蠕变试验、应力松弛试验和动态试验等方式。文章通过研究以沥青混合料动态模量为代表的粘弹性参数,考察试验温度、荷载频率以及沥青种类对混合料动态模量的影响。研究结果显示:沥青混合料动态模量值随着温度的升高而降低、随着荷载频率的增加而增加。对于同种沥青混合料,改性沥青相对于基质沥青,在低温高荷载频率条件下,动态模量值更小,具有更好的低温抗开裂性能;在高温低荷载频率下,动态模量值更大,具有更好的高温稳定性。
The asphalt mixture of viscoelastic material is a kind of typical viscous, elastic and plastic complex, and viscoelasticity is the basic mechanical characteristic. Creep test, stress relaxation test and dynamic test are usually used to study the viscoelastic properties of asphalt mixtures. In this paper, the viscoelastic parameters of asphalt mixture dynamic modulus are studied, and the effects of temperature, load frequency and asphalt mixture on the dynamic modulus of asphalt mixture are investigated. The results show that the dynamic modulus of asphalt mixture decreases with the increase of the temperature, and increases with the increase of the load frequency. For the same asphalt mixture, asphalt relative to the matrix asphalt, under the conditions of low temperature high load frequency and dynamic modulus values is small, with better low - temperature anti cracking performance; under the high temperature and low loading frequency, dynamic modulus values, has better high - temperature stability.
出处
《内蒙古公路与运输》
2016年第5期1-5,63,共5页
Highways & Transportation in Inner Mongolia
基金
交通运输部建设科技项目(2014318J21060)
关键词
道路工程
沥青混合料
粘弹性
动态模量
road engineering, asphalt mixture, viscoelasticity, dynamic modulus
