基于沥青路面加速加载磨耗试验研究

Study on accelerated load Wear Test based on Asphalt pavement

为了研究沥青路面抗滑,通过采用三种不同的类型的沥青混合料车辙试件,在25℃~35℃烘箱中烘烤2h左右,常温冷却后进行加速磨耗试验。实验结果表明:摩擦系数与构造深度均将随着摩耗的时间增多日益衰弱减少,AC-13玄武岩摩擦摆值刚开始值比SMA-13玄武岩稍高,AC-13玄武岩构造深度比AC-13玄武岩偏大;由于级配类型对抗滑性初始值的具有一定影响,导致实验时AC-13玄武岩衰变终值小于AC-13玄武岩,而且它衰变速度也比AC玄武岩慢很多;集料的摩光值与摩耗值对抗滑衰变速率大小与稳定之后衰变终值高低有着很密切关系;此外抗滑性能衰减率受温度影响也很大,随着温度升高,能够提升抗滑衰减率,当实验温度达到60℃以上,实验温度衰减率最快,衰减率最慢实验温度为25℃,不过试验温度对抗滑性能衰变曲线规律不会产生影响。

In order to study the anti-skid performance of asphalt pavement,the accelerated wear test was carried out by using three different types of asphalt mixture rut test,baking in 25℃35℃oven for about 2 hours,cooling at room temperature and then carrying out accelerated wear test.The experimental results show that the friction coefficient and tectonic depth will decrease with the increase of friction time,and the initial value of friction swing of AC-13 basalt is a little higher than that of SMA-13 basalt.The structural depth of AC-13 basalt is larger than that of AC-13 basalt.The final decay value of AC-13 basalts is lower than that of AC-13 basalts and its decay rate is much slower than that of AC basalts because of the influence of gradation type on initial values of anti-slip property.The friction value and friction value of aggregate are closely related to the rate of anti-slip decay and the final value of decay after stabilization.In addition,the anti-skid performance of the aggregate has a close relationship with the decline of anti-skid performance.When the experimental temperature is above 60℃,the experimental temperature decay rate is the fastest and the slowest rate is 25℃.However,there is no effect on the decay curve law of the anti-slip performance of the test temperature.