title: A study on the rheological properties of recycled rubber-modified asphalt mixtures.
abstract: Using waste rubber in asphalt mixes has become a common practice in road construction. This paper presents the results of a study on the rheological characteristics of rubber-modified asphalt (RMA) concrete under static and dynamic loading conditions. A number of static and dynamic creep tests were conducted on RMA mix specimens with different rubber sizes and contents, and a series of resonant column tests were conducted to evaluate the shear modulus and damping values. To simulate the stress-strain response of traffic-induced loading, the measurements were taken for different confining pressures and strain levels. The results of the study indicated that rubber modification increases stiffness and damping ratio, making it a very attractive material for use in road construction. However the grain size of the rubber is very important. Although RMA may cost up to 100% more than regular asphalt, the advantages it brings, such as an increased service life of the road and proper waste utilization contributing to a more sustainable infrastructure, may justify the added cost.
authors.affiliation: Department of Civil Engineering, Eskisehir Osmangazi University, 26480 Meselik, Eskisehir, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Karacasu
authors.affiliation: Department of Civil Engineering, Eskisehir Osmangazi University, 26480 Meselik, Eskisehir, Turkey.
authors.forename: Volkan
authors.identifier: 0000-0002-3416-8202
authors.initials: V
authors.lastname: Okur
authors.affiliation: Department of Civil Engineering, Akdeniz University, 07058 Antalya, Turkey.
authors.forename: Arzu
authors.initials: A
authors.lastname: Er