Recycled Asphalt Pavement (RAP) is the largest recycled good in the United States and 80 million tons are recycled yearly, saving taxpayers about $1.5 billion dollars. This paper explores the possibility of utilizing 100% RAP materials in asphalt pavement. Asphalt mixtures are produced at 135°C in a typical asphalt plant. However, at 135°C, not all binder from RAP materials may not become effective for coating aggregates. The main objective of the study is to determine the amount of effective binder available from RAP in the asphalt plant. The 100% RAP mixes have aged binder that can alter mix designs and interaction with virgin binder. In this study, to determine low temperature cracking resistance and fatigue performance, samples were prepared using a 100% RAP mix with no virgin binder and a 100% RAP mix with virgin asphalt binder to achieve the optimum binder content of the mix. Second, to determine the effectiveness of binder from RAP materials, compaction tests were performed by heating RAP materials at various temperatures. It was found that 100% RAP mixes cannot be feasible for field use if additional virgin binder is added to reach the optimum asphalt content. Based on limited test results, the low temperature grade was not within proper limits but the beam fatigue testing results were acceptable. Based on compaction test results, additional heating is needed to increase the effectiveness of asphalt binder from RAP materials.
Thesis
Feasibility of using 100% recycled asphalt pavement mixtures for road construction
University of Iowa
Master of Science (MS), University of Iowa
Autumn 2014
DOI: 10.17077/etd.s1ioermw
Free to read and download, Open Access
Abstract
Details
- Title: Subtitle
- Feasibility of using 100% recycled asphalt pavement mixtures for road construction
- Creators
- Russell Edgar Carlson IV - University of Iowa
- Contributors
- Hosin (David) Lee (Advisor)Wilfrid Nixon (Committee Member)Paul Hanley (Committee Member)
- Resource Type
- Thesis
- Degree Awarded
- Master of Science (MS), University of Iowa
- Degree in
- Civil and Environmental Engineering
- Date degree season
- Autumn 2014
- Publisher
- University of Iowa
- DOI
- 10.17077/etd.s1ioermw
- Number of pages
- xi, 67 pages
- Copyright
- Copyright 2014 Russell Edgar Carlson IV
- Language
- English
- Description illustrations
- color illustrations
- Description bibliographic
- Includes bibliographical references (pages 66-67).
- Academic Unit
- Civil and Environmental Engineering
- Record Identifier
- 9983777244802771
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