超薄磨耗层SMA-5沥青混合料的设计及性能研究

Study on Design Method and Road Performances of Ultra-thin Wearing Course SMA-5 Asphalt Mixture

采用改进的主骨料空隙体积填充法进行了超薄磨耗层SMA-5沥青混合料的配合比设计,经室内试验验证SMA-5沥青混合料路面具有良好的路用性能。试验路检测结果表明,与密级配沥青混凝土路面相比,超薄磨耗层SMA-5沥青路面的表面构造深度提高38%,摩擦系数提高14%,路面噪音降低3～4 dB,具有构造深度大、抗滑性能好、降噪效果明显的特点。

The modified coarse aggregate void filling method was adopted to design the ultra-thin wearing course SMA-5 asphalt mixture. It is validated by lab test that the designed SMA- 5 asphalt mixture has good road performance. The inspection result shows that texture depth and friction factor of the asphalt pavement with SMA-5 ultra-thin wearing course increase by 38% and 14% respectively and the pavement noise decrease by 3 -4 dB compared with those of density-gradation asphalt pavement. This asphalt mixture has the characteristics of large texture depth, good skid resistance and noise reduction effect.