Combined effect of waste polymer and rejuvenator on performance properties of reclaimed asphalt binder

2021 ◽  
Vol 268 ◽  
pp. 121059
Author(s):  
Daryoosh Daryaee ◽  
Mahdi Habibpour ◽  
Saqib Gulzar ◽  
Benjamin Shane Underwood
Keyword(s):  
Asphalt Binder ◽  
Combined Effect ◽  
Performance Properties ◽  
Reclaimed Asphalt ◽  
Waste Polymer

The Applicability of Estimated Equations of Recycling Agents on the Viscosity Variety of Aged Asphalt Binders

2013 ◽  
Vol 723 ◽  
pp. 670-677 ◽  
Author(s):  
Ping Sien Lin ◽  
Chi Wen Chang ◽  
Tung Lin Wu
Keyword(s):  
Asphalt Binder ◽  
Asphalt Binders ◽  
Apparent Effect ◽  
Reclaimed Asphalt ◽  
Aged Asphalt

This study was to perform the viscosity test of adding different ratios (from 10% to 40%) of three recycling agents (RAs), namely RA25, RA75 and RA250, to the reclaimed asphalt binder (RAB) containing a viscosity of 42800 poises. The purpose of the study was to determine the effects of various RAs on the viscosity of aged asphalt binders. The viscosity values were also estimated based on the recycling model of aged asphalt binder developed by authors and the equations developed by Arrhenius (1887), Grunberg and Nissan (1949) and Epps et al. (1980). The results show that there are significant variations in the viscosity of recycling asphalt binder when being added different ratios of RA. The estimated viscosity values computed by the recycling model of aged asphalt binder are closer to the tested results when compared with the equations developed by Arrhenius (1887), Grunberg and Nissan (1949) and Epps et al. (1980). Furthermore, the Recycling Index (RI) developed by the recycling model of aged asphalt binder can clearly and precisely reveal the recycling performance of different kinds of RAs. The Gmix from the equation developed by Grunberg and Nissan (1949) has an apparent effect on estimating the viscosity when adding RA to the RAB.

scholarly journals Methods to Evaluate the Aging Grades of Reclaimed Asphalt Binder

2017 ◽  
Vol 7 (12) ◽  
pp. 1209 ◽  
Author(s):  
Changjiang Kou ◽  
Peng Xiao ◽  
Aihong Kang ◽  
Peter Mikhailenko ◽  
Hassan Baaj ◽  
...  
Keyword(s):  
Asphalt Binder ◽  
Reclaimed Asphalt

Rejuvenator Influence on Aged Binder Material Properties

2017 ◽  
Vol 730 ◽  
pp. 380-388 ◽  
Author(s):  
Michal Varaus ◽  
Tomas Koudelka ◽  
Pavel Sperka
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Asphalt Mixtures ◽  
Reclaimed Asphalt Pavement ◽  
Optimum Amount ◽  
Bending Beam Rheometer ◽  
Reclaimed Asphalt ◽  
Binder Material ◽  
Aged Binder ◽  
Ball Test

As the amount of reclaimed asphalt pavement (RAP) material used in asphalt mixtures has increased recently, it is vital to address problems regarding aged binder incorporated in RAP. Asphalt binder hardens during its production process as well as during service life of pavements. External influences such as oxygen and ultraviolet radiation affect greatly bitumen characteristics. Thanks to adding rejuvenating agents, the original binder properties should be recovered and resulting asphalt binder parameters should become equal to those measured upon the reference material. In this study, four different rejuvenator agents and one neat soft binder were employed to rejuvenate the artificially aged binder by a complete blending between both constituents. Thereafter, empirical as well as performance based binder properties were examined with a dynamic shear rheometer (DSR) and with a bending beam rheometer (BBR). Three different dosages of each rejuvenator were added to evaluate the required amount for the original binder properties to be restored. Moreover, the softening efficiency of each agent was assessed by means of the Ring and Ball test. Finally, the optimum amount of each rejuvenator needed for the blend to achieve the target specification was determined. It can be concluded that the rejuvenators affect binder properties greatly, and mainly in a positive way. However, the data also indicate significant discrepancies between the types of the rejuvenator.

First Observation of Blending-Zone Morphology at Interface of Reclaimed Asphalt Binder and Virgin Bitumen

2013 ◽  
Vol 2370 (1) ◽  
pp. 1-9 ◽  
Author(s):  
S. N. Nahar ◽  
M. Mohajeri ◽  
A. J. M. Schmets ◽  
A. Scarpas ◽  
M. F. C. van de Ven ◽  
...  
Keyword(s):  
Asphalt Binder ◽  
Reclaimed Asphalt

scholarly journals Desempenho de misturas asfálticas recicladas mornas e sua influência no dimensionamento do revestimento asfáltico

2020 ◽  
Vol 41 (2) ◽  
pp. 157
Author(s):  
Fernanda Gadler ◽  
Leonardo Fagundes Rosemback Miranda ◽  
Joe Villena
Keyword(s):  
Resilient Modulus ◽  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Binder Content ◽  
Asphalt Mixtures ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Reclaimed Asphalt Pavement ◽  
Recycled Concrete Aggregate ◽  
Reclaimed Asphalt

The main purpose is to evaluate the performance of asphalt regarding resilient modulus and fatigue curve.The asphalt was produced with two wastes, reclaimed asphalt pavement (RAP) and recycled concrete aggregate (RCA), using the technique of warm mixtures. The evaluation includes, based on these parameters, the thickness differences in the design of asphalt layer for each mixture. Five asphalt mixtures were produced with incorporation of RAP and RCA, in different gradation fractions (fine and/or course), without adding any natural aggregate. In view of the aim of the article, the mixtures were evaluated through tests of resilient modulus and fatigue life, in order to support the design, establishing the necessary thickness to meet traffic demands of each mixture. The design was performed using MeDiNa software. Among all results, it is highlighted that asphalt binder content is the component that exerts the greatest influence on the resilient modulus of the mixtures. As for fatigue, in addition to the binder content, the possible anchoring of the asphalt binder in the pores of the RCA may have favored the performance of the GARC_MRAP mixture. Still, all mixtures with RAP, both in fine or course fraction, resulted in lower coating thicknesses compared to the REF, for the same load request, with better performance of the GARC_MRAP mixture produced with 100 % waste material and incorporation of only 3.1 % neat binder.

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