Investigation of Adding Proportion of RAP in Recycled Asphalt Mixture
1 Guangxi Key Lab of Road Structure and Materials, Nanning, 530007, China
2 Key Laboratory of Road Structure & Material Ministry of Transport, Chang’an University, Xi’an 710064, China
3 Key Laboratory of Road Structure & Material Ministry of Transport, Chang’an University, Nanning, 530007, China
4 Shaanxi College of Communication Technology, Shaanxi, 710018, China
According to the relationship between gradation and proportion of Reclaimed Asphalt Pavement (RAP) and design gradation of recycled mixture, the authors discussed the influence of proportion of RAP on gradation adjustment of recycled mixture. And then, recycled mixture with 0%, 30%, 50%, 70% of RAP were made, and Influence of proportion of RAP on high and low temperature performance, water stability and anti-aging performance of recycled mixture were discussed. The results and analysis indicate that gradation of recycled mixture would not be adjusted to aiming gradation if proportion of RAP was too big. With the increase of proportion of RAP, high temperature performance and anti-aging performance of recycled mixture enhanced, but low temperature performance and water stability decayed sharply. In practical application, reasonable proportion of RAP should be determined according to gradation, performance demand and economy of recycled mixture.
Key words: recycled asphalt mixture / proportion of RAP / gradation / road performance
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.