PDF courtesy of the American Concrete Pavement Association’s (ACPA’s) technical resources archives.
Oregon, in keeping pace with the modern progress of highway construction, has updated its Portland cement concrete paving practices. With the advent of the Interstate program, our design was updated to wire mesh reinforced pavement with joints formed by the insertion of paper strips or by sawing. Due to an extremely pleasant influx of marine air into the western portion of the state each afternoon, a troublesome problem occurs in sawing of joints. The trouble lies in a rather rapid initial curing of concrete due to midday heat and an accelerated contraction duo to the marine air influx. This results in a rather narrow band of’ sawing time. This trouble was alleviated to some extcmt when the gang saw came into general use. Our joint spacing under this design was 61 feet , 6 inches.
In an attempt to improve our paving design, we have now completed our second experimental project of continuous reinforced concrete . The first of these, which will be the subject of this paper, was completed in southern Oregon during the construction year of 1962. The second project was completed in the Portland urban area in the 1963 construction season and some mention of it will be made in this paper.
Author: Tom Edwards