粗骨材の形状特性がアスファルト混合物の変形現象に及ぼす影響
1989 年 1989 巻 408 号 p. 41-50
詳細
1989 年 1989 巻 408 号 p. 41-50
This paper deals with shape properties of crushed stone aggregate in asphalt mixture. It presents a method that determines the shape of aggregate quantitatively. Also in this paper, the configuration of coarse aggregate in asphalt concrete is examined using an image analysis system. Majority of stones consisting of coarse aggregate in asphalt pavement compacted by a roller are oriented at the angle of less than 30° from the horizontal plane. Using a flakey shape of crushed stone is grown Dynamic Stability by the Wheel-Trucking Test. And outdoor experiments by Trucks are made for confirmation of the Wheel-Trucking Test results. In conclusions, the coarse aggregate lined up in horizontal direction shows advantage of deformation phenomenon of asphalt pavement. Therefore, flakey shape aggregate is the best shape for asphalt mixture if it is arranged with the angle almost horizontal.
