An Experimental Self-Stressing Concrete Pavement, Route 2, Glastonbury. 2. 4-Year Pavement Evaluation

摘要

In September 1963 the Connecticut State Highway Department built 3 adjacent 500-ft. sections of experimental prestressed concrete pavement 6-inches thick and 24-feet wide on the southbound lane of State Route 2 in Glastonbury. Longitudinal tendons of 1/2-inch seven-wire strand on 14-inch centers and transverse No. 7 deformed bars on 2-ft. centers were preplaced and subsequently covered with a concrete containing an expansive cement. Construction difficulties were encountered and 4-inch growth occurred on each end of a 500-ft. section but this was inadequate when compared to the anticipated 18-inch necessary for a midlength residual of 300 psi which was necessary to prevent cracking from subgrade resistance. Consequently, the pavement has cracked and appears to be behaving as a CRCP. This report presents the observations during the first 4 years. Primary emphasis is placed on the analysis of joint and crack formation and movements data but information is also presented on traffic, serviceability, and joint conditions. Adequate photo coverage is provided to show the pavement condition and some recommendations for future research are presented. (BPR abstract)