Effect of ageing and RAP content on the induction healing properties of asphalt mixtures

被引：42
|
作者：
Gomez-Meijide, Breixo [1 ]
Ajam, Harith [1 ,2 ]
Lastra-Gonzalez, Pedro [3 ]
Garcia, Alvaro [1 ]
机构：
[1] Univ Nottingham, Dept Civil Engn, NTEC, Nottingham NG7 2RD, England
[2] Univ Babylon, Babil, Iraq
[3] Univ Cantabria, ETS Ingenieros Caminos Canales & Puertos Santande, Av Castros S-N, E-39005 Santander, Spain
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 179卷
基金：
英国工程与自然科学研究理事会;
关键词：
Asphalt; Ageing; RAP; Induction; Healing; REJUVENATORS; MICROCAPSULES; PERFORMANCE; CAPSULES; CONCRETE; BINDER; MODEL;
D O I：
10.1016/j.conbuildmat.2018.05.121
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Over the service life of asphalt roads, different factors produce, in the bitumen, a hardening process known as "ageing". Also, the addition of recycled, aged material (i.e. RAP) to new mixes modifies the viscosity of the mix. The present research studies how these two actions affect the capacity for healing, by electromagnetic induction, of asphalt mixes. Mixes subjected to different ageing processes or containing different amounts of RAP were tested. Results show that both ageing, and RAP content contribute to increasing binder stiffness and air voids content in the mix. Therefore, the healing process becomes less effective and energy efficient. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：468 / 476
页数：9
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