Aging effect on rheology and cracking behaviour of reclaimed binder with bio-based rejuvenators

JOURNAL OF CLEANER PRODUCTION

卷:189

Article

Cavalli, M. C.^1,2  Zaumanis, M.¹  Mazza, E.^1,2  Partl, M. N.¹  Poulikakos, L. D.¹ 

[1] Empa, CH-8600 Dubendorf, Switzerland

[2] ETH, Inst Mech Syst, CH-8092 Zurich, Switzerland

关键词: Reclaimed asphalt;    Rejuvenators;    Cracking resistance;    Rheology;    Oxidation;   

DOI  :  10.1016/j.jclepro.2018.03.305

来源: Elsevier

【 摘 要 】

Reclaimed asphalt pavement (RAP) is stiffer than the virgin material due to aging, thus it is expected to have worse cracking resistance. By adding bio-based rejuvenators, RAP binder mechanical performances at low temperatures improve: fracture toughness temperature of RAP decreases after the addition of rejuvenators to a level similar to the virgin binder. Furthermore, work to fracture of RAP binder increases after the addition of rejuvenators. Addition of rejuvenators to RAP binder can restore both mechanical properties and toughness at low temperature. However, despite the rejuvenators' addition, physiochemical oxidation did not reverse as mechanical changes were not caused by chemical changes at functional groups level. Results confirmed how considering the effect of aging is crucial when studying how rejuvenators affect the RAP binder chemically and mechanically. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

Free