Effect of Long-Term Aging on Fracture Properties of Virgin and Recycled Asphalt Concrete

2019 ◽  
Vol 8 (1) ◽  
pp. 20190092 ◽  
Author(s):  
Xuan Chen ◽  
Mansour Solaimanian
Keyword(s):  
Asphalt Concrete ◽  
Recycled Asphalt ◽  
Fracture Properties

The feasibility of using asphalt concrete with a high percentage of recycled asphalt material in a railway trackbed layer

2021 ◽  
Vol 26 ◽  
pp. 100429
Author(s):  
Petr Kucera ◽  
Martin Lidmila ◽  
Petr Jasansky ◽  
Marek Pycha ◽  
Michael P.N. Burrow ◽  
...  
Keyword(s):  
Asphalt Concrete ◽  
Recycled Asphalt

Mitigation of permanent deformation in base layer containing recycled asphalt aggregates

2013 ◽  
Vol 40 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Jean-Pascal Bilodeau ◽  
Guy Doré ◽  
Jonas Depatie
Keyword(s):  
Asphalt Concrete ◽  
Deformation Behaviour ◽  
Permanent Deformation ◽  
Design Procedure ◽  
Base Layer ◽  
Repeated Loading ◽  
Recycled Asphalt ◽  
Thickness Increase ◽  
Permanent Strain ◽  
Pavement Base

The use of recycled asphalt pavement (RAP) aggregates as replacement for new materials in the pavement base weakens the layer in regards to the resistance to permanent deformation under repeated loading. A mechanistic based design procedure is proposed to ensure that base layers containing RAP particles have a similar rutting behaviour to base layers made of virgin aggregates. The design procedure allows calculating an asphalt concrete thickness increase that is based on permanent deformation behaviour of base materials. The calculation approach is based on multistage triaxial permanent deformation tests performed on granular material samples with varied RAP content. The tests allowed proposing an equation that relates permanent strain rate, RAP content, and deviatoric stress, which is the basis of the design procedure. Design charts are proposed to select adequate thickness increase for the asphalt concrete layer according to the expected RAP content in the base layer and asphalt concrete modulus.

Review From Multiple Perspectives for the State of the Practice on the Use of Recycled Asphalt Materials and Recycling Agents in Asphalt Concrete Surface Mixtures

2021 ◽  
pp. 036119812110611
Author(s):  
Jhony Habbouche ◽  
Ilker Boz ◽  
Benjamin Shane Underwood ◽  
Cassie Castorena ◽  
Saqib Gulzar ◽  
...  
Keyword(s):  
Quality Control ◽  
Asphalt Concrete ◽  
Asphalt Binder ◽  
Concrete Surface ◽  
Lessons Learned ◽  
Multiple Perspectives ◽  
Recycled Asphalt ◽  
Recycled Materials ◽  
Continuous Quality ◽  
Virginia Department

The objective of this paper is to provide information from multiple perspectives on the current state of the practice with regard to using recycled materials and recycling agents (RAs) in asphalt concrete mixtures. This information was collected through a survey of U.S. transportation agencies and RA suppliers combined with a search of RA-related specifications and pilot projects previously constructed. Moreover, a case study describing the Virginia Department of Transportation’s experience with RAs provides a tangible example of how at least one agency is approaching the potential implementation of these technologies. This practice review was achieved by documenting the experience, lessons learned, and best practices of multiple asphalt experienced contractors and asphalt binder suppliers in the Virginia area. This paper follows a similar survey conducted in 2014 as part of NCHRP 09-58 and provides a second look at the use of RAs across North America. Not all state departments of transportation have experience with using RAs. Factors preventing the use of RAs included specification limitations, lack of expertise in processing recycled materials, supporting data, and negative prior experiences. Developing a performance-based testing framework is mandatory for the successful use of RAs. In general, good and frequent communication with the RA supplier is critical and necessary during the planning stages, the production of mixtures, and the continuous quality control by the supplier to resolve issues when they arise. Finally, a strong quality control and quality assurance-testing program should be implemented to ensure that materials meet the properties needed to produce a good-performing mixture.

scholarly journals Special Issue: Recent Advances and Future Trends in Pavement Engineering

2020 ◽  
Vol 5 (4) ◽  
pp. 34
Author(s):  
Patricia Kara De Maeijer
Keyword(s):  
Fiber Optics ◽  
Asphalt Concrete ◽  
Future Trends ◽  
Special Issue ◽  
Destructive Testing ◽  
Recycled Asphalt ◽  
Recent Advances ◽  
Pavement Monitoring ◽  
Pavement Engineering ◽  
Recent Developments

This Special Issue “Recent Advances and Future Trends in Pavement Engineering” has been proposed and organized to present recent developments in the field of innovative pavement materials and engineering. For this reason, the articles and state-of-the-art reviews highlighted in this editorial relate to different aspects of pavement engineering, from recycled asphalt pavements to alkali-activated materials, from hot mix asphalt concrete to porous asphalt concrete, from interface bonding to modal analysis, from destructive testing to non-destructive pavement monitoring by using fiber optics sensors.

Long-term strength of asphalt concrete and its applications

2020 ◽  
Vol 244 ◽  
pp. 118325
Author(s):  
A.I. Iskakbayev ◽  
B.B. Teltayev ◽  
K.Z. Yestayev ◽  
B.D. Abu
Keyword(s):  
Asphalt Concrete ◽  
Term Strength
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