Research on surface texture and skid resistance of asphalt pavement considering abrasion effect

Good anti-skid performance was the basis for road safety, and it was discovered that the texture abrasion of pavement in service can directly affect its anti-skid performance. To analyze the influence mechanism of abrasion on the surface texture and anti-skid performance of asphalt pavement, this research collected high-precision texture data of different types of asphalt pavements with different degrees of abrasion. The macro and micro texture evaluation indexes were obtained after data filtering and separation, and correlation analysis was conducted with anti-skid performance indexes. The results showed that: the mean profile depth MPD-1 of asphalt pavement could characterize the macro texture abrasion properties well, and the root mean square deviation Rq-2 could characterize the micro texture abrasion well. Simultaneously, it was discovered that the skid resistance attenuation rate was AC > SMA > OGFC, and the larger the nominal maximum size of the same gradation, the lower the attenuation rate. It also found that enhancing the nominal maximum size of the asphalt mixture can effectively increase the macro texture, which in turn improved the anti-skid performance. The attenuation pattern of the macro texture index MPD-1 was consistent with the skid resistance, while the micro texture index Rq-2 decreased quickly in the early stage and was remain in the later stage. The research verified the feasibility of characterizing the skid resistance of asphalt pavements by macro and micro texture.