摘要
沥青混合料是典型的粘弹性材料,其力学性质受温度和荷载作用频率的影响很大,基于时间-温度置换原理的沥青混合料的动态模量主曲线可以很好的描述这一行为,在路面结构设计和力学分析中具有重要作用。在介绍沥青混合料动态模量主曲线的原理的基础上,以2种类型的Superpave沥青混合料为例,详细叙述了利用时间—温度置换原理确定沥青混合料动态模量主曲线的步骤,并绘制了主曲线和时间—温度转化关系图用以描述沥青混合料的粘弹性。
Asphalt mixture is a typical viscoelastic-plastic material,which is sensitive to temperature and the rate of loading.So the use of master curve of dynamic modulus of asphalt mixture,based on time-temperature superposition principles,will allow the engineer to account for the approximate speed of the vehicle under consideration.The paper firstly introduced the principle of how to decide a master curve of dynamic modulus of asphalt mixture;Then taking two kinds of Superpave mixture for example,showed the detail steps and results of deciding the dynamic modulus master curve and time-temperature shift factors according to the time-temperature superposition principle.
出处
《公路工程》
2009年第5期60-62,78,共4页
Highway Engineering
关键词
沥青混合料
动态模量
主曲线
asphalt mixture
dynamic modulus
master curve
