关键词: 道路工程, 抗滑特性, SMA, 典型灰关联度, 级配范围

Abstract: In order to study the skid-resistance performance of Stone Mastic Asphalt pavement (SMA) and provide advice for the mixture proportion design, several primary parameters in mixture proportion design for SMA, such as the percentage passing through the key sieve size and asphalt content, were taken as factors and the orthogonal experiment design was established. The effects of these factors on the skid resistance were studied and the typical gray correlation degree was introduced to quantify the influence of primary parameters on skid resistance. The results indicate that: with the increase of the percentage passing through the maximum size of aggregate and asphalt content, the skid-resistance performance of SMA is reduced; for the skidresistance performance of SMA-13, when the percentage passing through the sieve size of 9.5 mm grows, it is increased firstly and then decreased; the trend of the skid-resistance performance is contrary when the percentage passing through the sieve size of 4.75 mm is increased; for the sieve size of 2.36 mm, the skid-resistance performance is inclined to increase gradually; and with the increase of asphalt content, the skid-resistance performance of SMA is inclined to decrease gradually. The influence degree of various parameters on the skid resistance follows in a descending order as: the passing percentage of the maximum size of aggregate, percentage passing through the key sieve size, asphalt content, the percentage passing of maximum size of aggregate through the sub-tissue sieve size, the percentage passing through the subtissue sieve size. Finally, based on the above research results, the gradation range for SMA with better skid resistance is recommended.

Key words: road engineering, skid-resistance, Stone Mastic Asphalt (SMA), typical gray correlation degree, gradation range