RECYCLED D-CRACKED PORTLAND CEMENT CONCRETE PAVEMENTS IN NORTH DAKOTA.

This paper presents the North Dakota approach to recycling portland cement concrete pavements (PCCP) on the Interstate system. A committee was appointed to develop a rehabilitation philosophy and a program that would get a fast start on project lettings. The program that came out of the committee started the recycling process and also developed concrete pavement restoration (CPR) projects consisting of joint repair, grinding to improve ride, asphaltic concrete shoulder recycling, and interchange overlays. The committee started its work by inspecting the entire Interstate system in February 1983 followed by a second inspection in April 1984. The 1984 inspection revealed a rate of deterioration greater than had originally been anticipated and this caused some rethinking concerning the cost effectiveness of scheduled CPR projects. The amount of joint repair, especially on the pavements with 20-ft joint spacing, will drive the cost up substantially.