结合料性质与应力吸收层沥青混合料疲劳性能相关性研究

Study on Relativity of Binder Property with Fatigue Performance of Stress Absorbing Layer Asphalt Mixture

为探讨结合料性质与应力吸收层沥青混合料性能之间的相关关系,该文分别对六种不同沥青及其对应混合料所作的试验研究进行了分析。结果表明,结合料性质对应力吸收层沥青混合料疲劳性能存在显著影响。其中,60℃粘度、软化点及针入度三项指标与应力吸收层混合料疲劳性能之间存在较好的相关性,可作为选择应力吸收层用沥青结合料的关键指标。

In order to discuss the correlativity of the binder property with the asphalt mixture performance of stress absorbing layer,the article separately analyzes the experiments of six different asphalts and the relative mixtures.The result makes clear that the property of binder obviously affects the fatigue performance of stress absorbing layer asphalt mixture,in which the better relativity is between three indexes,i.e.600C viscidity,intenerating point and penetration and the fatigue performance of stress absorbing layer asphalt mixture.Three indexes can be taken as the key indexes for selecting the asphalt binder used in the stress absorbing layer.