Performance of Various Thicknesses of P.C. Concrete Secondary Pavement, HR-9, 1979

(1979) Performance of Various Thicknesses of P.C. Concrete Secondary Pavement, HR-9, 1979. Transportation, Department of

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Abstract

In 1951 Greene County and the Iowa Highway Research Board paved County Road E-33 from Iowa Highway No. 17 (now Iowa 4) to Farlin with various thicknesses [ranging from 4.5 in. (11.4 cm) to 6 in. (15.2 cm)] of portland cement concrete pavement. The project, designated HR-9, was divided into ten research sections. This formed pavement was placed on the existing grade. Eight of the sections were non-reinforced except for centerline tie bars and no contraction joints were used. Mesh reinforcing and contraction joints spaced at 29 ft 7 in. (9.02 m) intervals were used in two 4.5-in. (11.4-cm) thick sections. The concrete in one of the sections was air entrained. Signs denoting the design and limits of the research sections were placed along the roadway. The pavement has performed well over its 28-year life, carrying a light volume of traffic safely while requiring no major maintenance. The 4.5-in. (11.4-cm) thick mesh-reinforced pavement with contraction joints has exhibited the best overall performance.

Item Type: Departmental Report
Keywords: Air entrained concrete, Concrete pavements, Contraction joints, Low volume roads, Pavement performance, Pavements, Reinforcement (Engineering), Secondary roads, Test sections, Thickness, Wire mesh, Pavement thickness
Subjects: Transportation > Pavements
Transportation > Pavements > Concrete
Transportation
Transportation > Roads and highways
Transportation > Design and Construction
ID Code: 16988
Deposited By: Iowa DOT Library
Deposited On: 02 Jun 2014 11:54
Last Modified: 18 Sep 2014 18:35
URI: http://publications.iowa.gov/id/eprint/16988