Assessing binder blending level in asphalt mixtures containing recycled asphalt shingles

Naser P. Sharifi; Zachary Mckay; Phillip Blankenship; Kamyar C. Mahboub; R. Michael Anderson

doi:10.1061/(ASCE)MT.1943-5533.0002835

Assessing binder blending level in asphalt mixtures containing recycled asphalt shingles

Naser P. Sharifi, Zachary Mckay, Phillip Blankenship, Kamyar C. Mahboub, R. Michael Anderson

Civil Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (SciVal)

Abstract

The recycling of asphalt shingles (RAS) in hot mix asphalt (HMA) has been the topic of much research. The asphalt binder of RAS is highly aged, oxidized, and stiffened, and the incorporation of it into HMA may alter the performance characteristics of the asphalt mixture. The first goal of this study was to determine the degree to which RAS binder blends with HMA virgin binder; the second goal was to determine the potential effects of this blending of binders on the long-term performance of RAS-containing HMA. A series of laboratory experiments were conducted, and the performance of RAS-containing HMA, which was fabricated replicating practical field conditions, was compared in two extreme scenarios-zero binder blending and total blending. The results showed that the performance of RAS-containing HMA tended to be closer to the total blending scenario. This suggests that RAS binder blends with HMA virgin binder nearly to the full extent. In addition, increasing RAS content makes HMA brittle and, therefore, more vulnerable to early-age cracking.

Original language	English
Article number	4019144
Journal	Journal of Materials in Civil Engineering
Volume	31
Issue number	8
DOIs	https://doi.org/10.1061/(ASCE)MT.1943-5533.0002835
State	Published - Aug 1 2019

Bibliographical note

Funding Information:
This paper is based on work supported by the US Department of Transportation under Cooperative Agreement No. DTFH61-11-H-00033. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the US Department of Transportation, the University of Kentucky, or the Asphalt Institute and its member companies.

Funding Information:
The authors thank the Federal Highway Administration (FHWA) for its financial support and thank John Bukowski, Michael Arasteh, and Matthew Corrigan-all from the FHWA-for their technical support. In addition, the authors gratefully acknowledge the support of the member companies of the Asphalt Institute. Without their continued interest and support, none of the work could have been accomplished. Additional support was provided by the University of Kentucky.

Funding Information:
The authors thank the Federal Highway Administration (FHWA) for its financial support and thank John Bukowski, Michael Arasteh, and Matthew Corrigan—all from the FHWA—for their technical support. In addition, the authors gratefully acknowledge the support of the member companies of the Asphalt Institute. Without their continued interest and support, none of the work could have been accomplished. Additional support was provided by the University of Kentucky.

Publisher Copyright:
© 2019 American Society of Civil Engineers.

Keywords

Asphalt mixtures
Fatigue life
Flexibility index
Fracture energy
Recycled asphalt shingles (RAS)
Regression analysis

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Materials Science (all)
Mechanics of Materials

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10.1061/(ASCE)MT.1943-5533.0002835

Cite this

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title = "Assessing binder blending level in asphalt mixtures containing recycled asphalt shingles",

abstract = "The recycling of asphalt shingles (RAS) in hot mix asphalt (HMA) has been the topic of much research. The asphalt binder of RAS is highly aged, oxidized, and stiffened, and the incorporation of it into HMA may alter the performance characteristics of the asphalt mixture. The first goal of this study was to determine the degree to which RAS binder blends with HMA virgin binder; the second goal was to determine the potential effects of this blending of binders on the long-term performance of RAS-containing HMA. A series of laboratory experiments were conducted, and the performance of RAS-containing HMA, which was fabricated replicating practical field conditions, was compared in two extreme scenarios-zero binder blending and total blending. The results showed that the performance of RAS-containing HMA tended to be closer to the total blending scenario. This suggests that RAS binder blends with HMA virgin binder nearly to the full extent. In addition, increasing RAS content makes HMA brittle and, therefore, more vulnerable to early-age cracking.",

keywords = "Asphalt mixtures, Fatigue life, Flexibility index, Fracture energy, Recycled asphalt shingles (RAS), Regression analysis",

author = "Sharifi, {Naser P.} and Zachary Mckay and Phillip Blankenship and Mahboub, {Kamyar C.} and Anderson, {R. Michael}",

note = "Funding Information: This paper is based on work supported by the US Department of Transportation under Cooperative Agreement No. DTFH61-11-H-00033. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the US Department of Transportation, the University of Kentucky, or the Asphalt Institute and its member companies. Funding Information: The authors thank the Federal Highway Administration (FHWA) for its financial support and thank John Bukowski, Michael Arasteh, and Matthew Corrigan-all from the FHWA-for their technical support. In addition, the authors gratefully acknowledge the support of the member companies of the Asphalt Institute. Without their continued interest and support, none of the work could have been accomplished. Additional support was provided by the University of Kentucky. Funding Information: The authors thank the Federal Highway Administration (FHWA) for its financial support and thank John Bukowski, Michael Arasteh, and Matthew Corrigan—all from the FHWA—for their technical support. In addition, the authors gratefully acknowledge the support of the member companies of the Asphalt Institute. Without their continued interest and support, none of the work could have been accomplished. Additional support was provided by the University of Kentucky. Publisher Copyright: {\textcopyright} 2019 American Society of Civil Engineers.",

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AU - Sharifi, Naser P.

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AU - Blankenship, Phillip

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AU - Anderson, R. Michael

N1 - Funding Information: This paper is based on work supported by the US Department of Transportation under Cooperative Agreement No. DTFH61-11-H-00033. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of the US Department of Transportation, the University of Kentucky, or the Asphalt Institute and its member companies. Funding Information: The authors thank the Federal Highway Administration (FHWA) for its financial support and thank John Bukowski, Michael Arasteh, and Matthew Corrigan-all from the FHWA-for their technical support. In addition, the authors gratefully acknowledge the support of the member companies of the Asphalt Institute. Without their continued interest and support, none of the work could have been accomplished. Additional support was provided by the University of Kentucky. Funding Information: The authors thank the Federal Highway Administration (FHWA) for its financial support and thank John Bukowski, Michael Arasteh, and Matthew Corrigan—all from the FHWA—for their technical support. In addition, the authors gratefully acknowledge the support of the member companies of the Asphalt Institute. Without their continued interest and support, none of the work could have been accomplished. Additional support was provided by the University of Kentucky. Publisher Copyright: © 2019 American Society of Civil Engineers.

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N2 - The recycling of asphalt shingles (RAS) in hot mix asphalt (HMA) has been the topic of much research. The asphalt binder of RAS is highly aged, oxidized, and stiffened, and the incorporation of it into HMA may alter the performance characteristics of the asphalt mixture. The first goal of this study was to determine the degree to which RAS binder blends with HMA virgin binder; the second goal was to determine the potential effects of this blending of binders on the long-term performance of RAS-containing HMA. A series of laboratory experiments were conducted, and the performance of RAS-containing HMA, which was fabricated replicating practical field conditions, was compared in two extreme scenarios-zero binder blending and total blending. The results showed that the performance of RAS-containing HMA tended to be closer to the total blending scenario. This suggests that RAS binder blends with HMA virgin binder nearly to the full extent. In addition, increasing RAS content makes HMA brittle and, therefore, more vulnerable to early-age cracking.

AB - The recycling of asphalt shingles (RAS) in hot mix asphalt (HMA) has been the topic of much research. The asphalt binder of RAS is highly aged, oxidized, and stiffened, and the incorporation of it into HMA may alter the performance characteristics of the asphalt mixture. The first goal of this study was to determine the degree to which RAS binder blends with HMA virgin binder; the second goal was to determine the potential effects of this blending of binders on the long-term performance of RAS-containing HMA. A series of laboratory experiments were conducted, and the performance of RAS-containing HMA, which was fabricated replicating practical field conditions, was compared in two extreme scenarios-zero binder blending and total blending. The results showed that the performance of RAS-containing HMA tended to be closer to the total blending scenario. This suggests that RAS binder blends with HMA virgin binder nearly to the full extent. In addition, increasing RAS content makes HMA brittle and, therefore, more vulnerable to early-age cracking.

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KW - Fracture energy

KW - Recycled asphalt shingles (RAS)

KW - Regression analysis

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Assessing binder blending level in asphalt mixtures containing recycled asphalt shingles

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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