Estimation of Reclaimed Asphalt Pavement Binder Low-Temperature Properties without Extraction

2010 ◽  
Vol 2179 (1) ◽  
pp. 58-65 ◽  
Author(s):  
Tao Ma ◽  
Enad Mahmoud ◽  
Hussain U. Bahia
Keyword(s):  
Low Temperature ◽  
Asphalt Pavement ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt

Wearing Course Mixtures Prepared with High Reclaimed Asphalt Pavement Content Modified by Rejuvenators

2018 ◽  
Vol 2672 (28) ◽  
pp. 96-106 ◽  
Author(s):  
Stephan Büchler ◽  
Augusto Cannone Falchetto ◽  
Axel Walther ◽  
Chiara Riccardi ◽  
Di Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Asphalt Pavement ◽  
Fatigue Behavior ◽  
Permanent Deformation ◽  
Field Tests ◽  
Asphalt Mixtures ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
Combined Use ◽  
Characterization Test

This paper presents an experimental investigation on the combined use of high content of reclaimed asphalt pavement (RAP) and rejuvenators, for producing asphalt mixtures for wearing courses. First, the new Binder-Fast-Characterization-Test (Bitumen Typisierungs Schnell Verfahren in German) BTSV method, recently proposed in Germany, is used to determine the amount of rejuvenator required to design recycled mixtures for a specific RAP source. Then, a set of seven asphalt mixtures for wearing course is prepared with different amounts of RAP and with three types of rejuvenators. The BTSV procedure is further applied to evaluate the rheological properties of the binder extracted from the mixtures. Resistance to permanent deformation, stiffness, fatigue, and low temperature behavior tests are then performed to determine the material response. It is observed that the use of recycled material and rejuvenators results in similar or better deformation resistance, higher stiffness and enhanced low temperature properties, with an improved fatigue behavior, also for high RAP content, when compared to mixtures prepared with virgin material. These findings suggest the possibility of using rejuvenators for field tests on wearing courses.

Experimental Investigation on Fatigue and Low Temperature Properties of Asphalt Mixtures Designed with Reclaimed Asphalt Pavement and Taconite Aggregate

2019 ◽  
Vol 2673 (3) ◽  
pp. 472-484 ◽  
Author(s):  
Ki Hoon Moon ◽  
Augusto Cannone Falchetto ◽  
Di Wang ◽  
Yun Su Kim
Keyword(s):  
Low Temperature ◽  
Mechanical Performance ◽  
Asphalt Pavement ◽  
Fatigue Behavior ◽  
Economic Benefits ◽  
Asphalt Mixtures ◽  
Reclaimed Asphalt Pavement ◽  
Recycled Materials ◽  
Reclaimed Asphalt ◽  
By Products

Using reclaimed asphalt material for rehabilitation and construction of new asphalt pavements is currently a common practice not only in view of the economic benefits associated with this process but also because of the reduced exploitation of natural resources. For this reason, road authorities have implemented recommendations and guidelines to regulate the use of reclaimed asphalt pavement (RAP) and other recycled materials such as industrial by-products. Nevertheless, the combined use of different recycled materials is not commonly addressed. In this paper, the effect of adding RAP and taconite (a mining by-product) on fatigue and low temperature properties of asphalt mixture was investigated with two different testing geometries: indirect tensile (IDT) and semi-circular bending (SCB). Fatigue behavior, creep stiffness, relaxation modulus, low temperature fracture energy, and fracture toughness were also evaluated, computed, and then compared. A more brittle behavior was observed for mixture prepared with RAP material, however, the mechanical performance was not significantly different for mixtures containing 20% RAP alone and in combination with 50% taconite compared with conventional asphalt mixtures designed with virgin material. This was not the case when RAP content was increased up to 50%, showing a substantially poorer response both in terms of fatigue and low temperature characteristics and suggesting the RAP had a dominant effect. The present exploratory research seems to support the idea of combining RAP and different industry by-products, such as taconite, as long as the RAP content is kept below a specific threshold.

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