Influence of Coarse Aggregate Morphology on the Anti-slip Performance of Asphalt Pavement
In order to further clarify the relationship between the morphology characteristics of coarse aggregate and the skid resistance performance of asphalt pavement,based on the AIMS Ⅱ equipment,the morphology indexes of the coarse aggregates with 3 kinds of lithologies and 4 kinds of shaping degrees such as gradient prism,texture in-dex,sphericity,and morphology comprehensive indexes were obtained.And the pendulum friction meter and the la-ser scanner were used to obtain anti-slip performance evaluation indexes such as BPN20,the average tectonic depth MTD,the morphology parameter and fractal dimension indexes of the asphalt mixture surface layer.The relationship between the morphology indexes of coarse aggregate and the anti-slip performance evaluation indexes of asphalt mix-ture surface layer was established by Pearson correlation coefficient method.The results show that the weighted ex-pected gradient prism value of the mixed coarse aggregate has a large correlation with the BPN20 value of the pave-ment,and the correlation coefficient reaches more than 0.9.It is recommended that the gradient prism value of the coarse aggregate should be increased before the construction,so as to ensure that the asphalt pavement has a reliable anti-slip performance.The research results are useful for further improving the anti-slip performance of asphalt pave-ment.
万方数据
维普
