Field Evaluation of Cold In-Place Recycling of Asphalt Concrete, HR-303, Construction Report, 1990

(1990) Field Evaluation of Cold In-Place Recycling of Asphalt Concrete, HR-303, Construction Report, 1990. Transportation, Department of

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Abstract

There are still many vintage portland cement concrete (PCC) pavements, 18 ft wide (5.4 m), dating back to pre-World War II era in use today. Successive overlays have been placed to cover joints and to improve rideability. The average thickness of the existing asphalt cement concrete (ACC) along route E66 in Tama County, Iowa, was 6.13 in. (15.6 cm). The rehabilitation strategy called for widening the base using the top 3 in. (7.6 cm) of the existing ACC by a recycling process involving cold milling and mixing with additional emulsion/rejuvenator. The material was then placed into a widening trench and compacted to match the level of the milled surface. This project was undertaken to develop a rehabilitation methodology to widen these older pavements economically and to have a finished surface capable of carrying traffic with little or no additional work.

Item Type: Departmental Report
Keywords: Asphalt concrete, Cold in-place recycling, Cold weather, Concrete pavements, Driver rehabilitation, Overlays (Pavements), Pavement widening, Recycling, Thickness
Subjects: Transportation > Pavements
Transportation > Pavements > Asphalt
Transportation
Transportation > Research
Transportation > Maintenance and preservation
ID Code: 21996
Deposited By: Iowa DOT Library
Deposited On: 29 Apr 2016 19:51
Last Modified: 29 Apr 2016 19:51
URI: http://publications.iowa.gov/id/eprint/21996