Affiliation:
1. Department of Civil, Environmental, Land, Building Engineering and Chemistry, Politecnico di Bari, Bari, Italy
2. Professional Engineer, Consultant, Bari, Italy
3. School of Civil Engineering, Chongqing Jiaotong University, Chongqing, China
4. Faculty of Civil Engineering, Institute of Roads and Bridges, Warsaw University of Technology, Warsaw, Poland
Abstract
This paper describes physical and mechanical properties of porous asphalt mixtures with various RAP amount (0%, 10%, 20%, 30%) containing one WMA additive (organic wax). The samples were prepared using the Marshall compactor at two different temperatures (125 °C, 145 °C) by fabricating six series of porous mixtures. Air void content, particle loss, stiffness modulus, indirect tensile strength, and indirect tensile strength ratio were measured and the effects of RAP, wax, and compaction temperatures were evaluated, considering the results of statistical analyses. Based on the performed tests, it has been concluded that high RAP contents (30%) in WMA-RAP PAs result in decreased porosity, permeability, and moisture resistance, and in increased cohesiveness, stiffness, and indirect tensile strength compared to the reference PAs. On the other hand, for low RAP contents (10%), WMA-RAP PAs show lower cohesiveness and indirect tensile strength, at the same time demonstrating an increase in porosity, permeability, moisture resistance, and stiffness. Reduced compaction temperatures (125 °C) particularly affect the cracking resistance.
Publisher
Riga Technical University
Subject
Building and Construction,Civil and Structural Engineering
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