NDLI: Effects of recycling agents on aged asphalt binders and reclaimed asphalt concrete

Content Provider	Springer Nature Link
Author	Lin, Ping Sien Wu, Tung Lin Chang, Chi Wen Chou, Bang Yan
Copyright Year	2010
Abstract	This paper aims to study the effect of adding different ratios (from 10 to 40%) of three recycling agents (RAs), including RA-25, RA-75 and RA-250, to the reclaimed asphalt binder (RAB) with a viscosity of 42800 poises and also to the reclaimed asphalt concrete (RAC) according to the Marshall mix design method. The study includes a variety of tests designed to determine the difference between the three RAs in terms of penetration, viscosity, softening point, ductility, toughness of the asphalt binder, as well as indirect tensile strength, and stability value of Marshall specimens. The results show that adding the RA increased the cohesiveness of RAB and thus improved the applicability of RAB. Of the three RAs in this study, RA-25 offered the best performance when added to asphalt binder. This study proposes a recycling model to predict the changes in RAB viscosity when adding RAs. The results of this model show a close fit with experimental data from laboratory tests. This model allows highway engineers to estimate the amount of RA added to aged binder. Marshall tests show that the RA-75 specimen had higher indirect tensile strength and stability value than the RA-25 and RA-250 specimens. Based on overall performance and cost comparisons among the three RAs, this study regards RA-75 as the RA of choice.
Starting Page	911
Ending Page	921
Page Count	11
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	44
Issue Number	5
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-11-02
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Recycling agent Viscosity RAB RAP Recycling model Materials Science Structural Mechanics Building Materials Civil Engineering Theoretical and Applied Mechanics Operating Procedures, Materials Treatment
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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