Makiko OHTAKE

Development of Asphalt Mixtures Using Crumb Rubber for Multi Functional Pavements

Teruhiko MARUYAMA

Area of porous pavements tends to increase in Japan. But these pavements in cold area and crossings are required better performance because of hard condition for durability.
The asphalt rubber (AR) used in this research is a binder of approximately 15 percent of fine crumb rubber made from scrap tires and 85 percent of conventional asphalt. Pavements using AR have been already constructed in the United States and estimated their greater durability, better performance, and higher economical effects.
We have to develop more durable and functional porous pavements by using economical crumb tire rubber. According to using AR binder, this research is also trying to improve characteristics of mineral aggregate by replacing a part of the aggregates to rubber chips. This replacement intends to obtain low elastic and large deformable material so that we can make traffic noise smaller and ice on road surfaces breakable. This research made clear the basic mechanical characteristics of AR and AR mixtures.