Effects of RH-WMA additive on rheological properties of high amount reclaimed asphalt binders

Lillian Gungat and Nur Izzi Md. Yusoff and Meor Othman Hamzah (2016) Effects of RH-WMA additive on rheological properties of high amount reclaimed asphalt binders. Construction and Building Materials, 114. pp. 665-672. ISSN 9500618


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Warm mix asphalt (WMA) additive enables the utilization of more reclaimed asphalt pavement (RAP) in road construction. However, variations in RAP properties complicate the characterization of the rheological properties of virgin binder when blended with reclaimed asphalt binder. This study presents the evaluation of rheological properties of reclaimed asphalt binder incorporating RH-WMA, a new wax based WMA additive. The reclaimed asphalt binders recovered from two road sources were blended at various percentages with 3% RH-WMA additive. The rheological evaluations were carried out from the viscosity and dynamic shear rheometer (DSR) test results. The results indicated that the incorporation of reclaimed asphalt binder into virgin binder increased the viscosity and stiffness, while addition of RH-WMA additive slightly reduced the viscosity and stiffness. A non-dimensional viscosity index indicated an increase in relative viscosity for every 1% reclaimed asphalt binder. The SHRP Rutting Parameter, rheological master curves and multiple stress creep and recovery (MSCR) test results showed consistency in terms of binder stiffness. An interesting finding on the elasticity improvement demonstrated by percent recovery due to the addition of RH-WMA additive in the MSCR test, indicated the possibilities of rutting improvement when utilizing RAP and RH-WMA additive. © 2016 Elsevier Ltd. All rights reserved.

Item Type: Article
Keyword: Reclaimed asphalt binder; Reclaimed asphalt pavement; Rheology; Viscosity; Warm mix additive
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Department: FACULTY > Faculty of Engineering
Depositing User: ADMIN ADMIN
Date Deposited: 20 Jul 2016 14:14
Last Modified: 23 Oct 2017 12:39
URI: https://eprints.ums.edu.my/id/eprint/13556

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