沥青混合料应力松弛试验研究

本文对沥青混合料应力松弛试验所需设备的要求,试件的制作和试验条件的确定等问题进行了探索。用自行改装的设备对几种类型的沥青混合料进行了应力松弛试验。证明压缩式应力松弛试验是可行的;试验时应取用较大的初始应力和较低的负温;用松弛模量指标更能有效地判断沥青混合料的低温性能.

Study on the Stress Relaxation Test of Bituminous Mixture

The requirments of the apparatus of which is made use to study stress relaxation of bituminous mixture were discussed. The technique for making the specimens and determining the test conditions was dealt with. The stress relaxation test for some types of bituminous mixture has performed using a self-refited test machine. It is proved that the compression stress relaxlion test is reliable, and larger initial stress and lower negative temperature should be adopted. It is more effective to use relaxation modulus to judge the properties of bituminous mixture under low temperature.