Investigation of Warm-Mix Asphalt (WMA) with Chemical Additives for Moisture Susceptibility
To date, moisture induced damage is the most common pavement damage observed in warm-mix asphalt (WMA) pavement. This study evaluated moisture damage resistance of WMA with chemical additives through laboratory experimentation and repeated load-deformation analysis. To facilitate the study, two chemical WMA mixtures (Evotherm and Cecabase) and one control hot-mix asphalt (HMA) have been employed in this study. In addition, another Cecabase WMA containing polymer modified binder (PMB) has been employed to assess the polymer effect on chemical WMA. Laboratory evaluation have been conducted through Hamburg wheel tracking test (HWTT) results analysis. A new HWTT analysis encompassing viscoplastic and stripping induced strain have been successfully employed for better moisture damage evaluation. Two recently proposed moisture damage evaluation parameters, stripping number and stripping life, have been estimated. In addition, tensile strength ratio (TSR) test have been conducted for validating newly HWTT analysis results. Results and analysis revealed that permanent strain-based HWTT analysis is better predictive in moisture damage evaluation. The study found that chemical additives with non-polymerized binder showed equivalent moisture damage resistance as HMA. However, PMB utilization in chemical WMA resulted in improved moisture damage resistance.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784483541
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Supplemental Notes:
- © 2021 American Society of Civil Engineers.
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Bairgi, Biswajit K
- Tarefder, Rafiqul A
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Conference:
- International Conference on Transportation and Development 2021
- Date: 2021-6-8 to 2021-6-10
- Publication Date: 2021
Language
- English
Media Info
- Pagination: pp 313 - 321
- Monograph Title: International Conference on Transportation and Development 2021: Transportation Planning and Development
Subject/Index Terms
- TRT Terms: Additives; Binders; Chemicals; Hot mix asphalt; Moisture damage; Polymer asphalt; Stripping (Pavements); Tensile strength; Viscoplasticity; Warm mix paving mixtures
- Identifier Terms: Hamburg Wheel Rut Tester
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01777601
- Record Type: Publication
- ISBN: 9780784483541
- Files: TRIS, ASCE
- Created Date: Jul 23 2021 3:26PM