Recycled Micro Surfacing Based on RAP Refined Separation Process

DOI

10.2991/978-94-6463-312-2_16How to use a DOI?

Keywords

asphalt pavement; micro surfacing; recycled asphalt pavement materials; refined separation

Abstract

To achieve high value utilization of reclaimed asphalt pavement materials (RAP), RAP with refined separation was applied to the recycled micro surfacing (the coarse and fine aggregates of micro surfacing coming from RAP), achieving efficient integration of RAP and micro surfacing. The gradation curves were designed based on MS-3 micro surfacing, and the influence of water consumption was explored on the mixing time of recycled micro surfacing mixture. In addition, the influence of modified emulsified asphalt dosage was analysed on the cohesion, wet-track abrasion loss, and sand adhesion of the recycled micro surfacing mixture. The results show that the mixing time of the recycled micro surfacing mixture gradually increases with increasing of water consumption, and the water consumption should not be less than 7%. The cohesion increases with the prolongation of curing time, and the initial setting time and open traffic time of the recycled micro surfacing mixture should be set at 60 min and 90 min, respectively. As the modified emulsified asphalt dosage increases, the wet-track abrasion loss of the recycled micro surfacing mixture gradually decreases, and the sand adhesion gradually increases. The dosage of modified emulsified asphalt for MS-3 micro surfacing mixture should be controlled between 6.3%–7.2%, and the optimal dosage of modified emulsified asphalt is 6.85%.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Jian Li
AU  - Xiaojun Guo
AU  - Dixia Zhao
AU  - Zhihua Li
AU  - Peng Wang
AU  - Jie Wang
AU  - Shenghui Zhao
AU  - Jieyi Gao
PY  - 2023
DA  - 2023/12/07
TI  - Recycled Micro Surfacing Based on RAP Refined Separation Process
BT  - Proceedings of the 2023 5th International Conference on Structural Seismic and Civil Engineering Research (ICSSCER 2023)
PB  - Atlantis Press
SP  - 149
EP  - 157
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-312-2_16
DO  - 10.2991/978-94-6463-312-2_16
ID  - Li2023
ER  -