沥青混合料抗永久变形特性试验方法评价

车辙已经成为我国高等级公路不可忽视的损坏类型之一。就不同温度下沥青混合料抵抗永久变形的能力分别采用APA和单轴贯入试验进行分析。结果表明虽然APA试验能够区分普通沥青混合料在不同温度下抗永久变形特性,但不能评判不同温度下的SBS改性沥青混合料的抗永久变形特性。由于单轴贯入试验可以模拟实际路面的受力状态,同时其试验结果与实际路面车辙变形也具有良好的相关性,并且,单轴贯人试验还可以较好地区别不同沥青混合料,包括SBS改性沥青混合料,在不同温度下的抗永久变形特性。因此建议研究沥青混合料抗永久变形性能时应选择单轴贯入试验。

Evaluation of the Test Methods for Anti-permanent Deformation Performance of Asphalt Mixture

Rut has been a major distress of high-grade pavement in our country.The anti-permanent deformation perform- ances of asphalt mixtures were tested with APA and Single Penetration Test respectively under different temperatures.The test results show that APA can differentiate the anti-permanent deformation performances of asphalt mixture under different temperatures,but it can't differentiate the anti-permanent deformation performances of SBS modified asphalt mixture under different temperatures.Compared with APA test,the Single Penetration Test can simulate the real asphalt pavement stress and strain condition,and its results have good pertinence to deformation of actual pavement rut.Moreover,Single Penetration Test can distinguish anti-permanent deformation performances of different asphalt mixtures well,including SBS modified as- phalt mixture,under different temperatures.Therefore,it is suggested that adopting Single Penetration Test to evaluate the anti-permanent deformation performance of asphalt mixtures is better than APA test does.