Foamed Asphalt Shoulders City of Muscatine, HR-529, 1993

(1993) Foamed Asphalt Shoulders City of Muscatine, HR-529, 1993. Transportation, Department of

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Abstract

Foamed asphalt shoulders were placed on an Industrial Connector road at the south edge of Muscatine. The foamed asphalt was produced by injecting 1 to 2 percent water into hot asphalt cement in a patented foaming chamber. A foam develops which is 10 to 15 times the original volume. of the asphalt cement. A 3/8" limestone aggregate was used in the foamed asphalt mixture. This foamed asphalt was placed on the shoulders and in the radii on the Industrial Connector road in May 1987. The radii were later replaced due to reconstruction, but the shoulders remain and performed fairly well with some recent stripping and potholing. The performance appeared to be lower than expected from conventional hot mix on projects with similar traffic.

Item Type: Departmental Report
Keywords: Asphalt concrete pavements, Foamed asphalt, Limestone aggregates, Pavement performance, Road shoulders
Subjects: Transportation > Pavements
Transportation > Pavements > Asphalt
Transportation
Transportation > Materials
Transportation > Materials > Gravel and aggregates
Transportation > Roads and highways
ID Code: 19731
Deposited By: Iowa DOT Library
Deposited On: 02 Jun 2015 18:22
Last Modified: 02 Jun 2015 18:22
URI: http://publications.iowa.gov/id/eprint/19731