Asphalt Resurfacing Structural Research, HR-556, Construction Report, 1995

(1995) Asphalt Resurfacing Structural Research, HR-556, Construction Report, 1995. Transportation, Department of

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Abstract

Discarded tires present major disposal and environmental problems. One method of recycling tires is to use finely ground rubber from tires in asphalt cement concrete (ACC). This process has been researched in Iowa since 1991. There are currently eight projects being researched. This project involved using crumb rubber modifier (CRM) in ACC using a dry process. This project is located on US 63 in Howard County. It involved 17 test sections. There were five test sections using 20 lb of CRM per ton, four test sections using 10 lb of CRM per ton and eight test sections using a conventional mix. Not only were different mixes used, but the overlay was also placed in various thicknesses ranging from 2 in. to 8 in. (5 cm to 20 cm). The project was completed in August 1994. The project construction went well with only minor problems. This report contains information about procedures and tests that were completed and those that will be completed. Evaluation on the project will continue for five years.

Item Type: Departmental Report
Keywords: Asphalt rubber, Crumb rubber, Overlays (Pavements), Solid wastes, Test procedures, Test sections, Thickness, Tires
Subjects: Transportation > Pavements
Transportation
Transportation > Roads and highways
Transportation > Research
Transportation > Research > Concrete
Transportation > Design and Construction
ID Code: 16903
Deposited By: Iowa DOT Library
Deposited On: 13 May 2014 12:13
Last Modified: 28 May 2015 15:09
URI: http://publications.iowa.gov/id/eprint/16903