CRCP in Virginia – Lessons Learned
This paper presents the lessons learned from the performance of continuously reinforced concrete pavement (CRCP) in Virginia. The approach was to identify the most critical distresses, establish the failure mechanism, and implement the best practice for extended service life with minimal maintenance. Distress included map cracking, localized areas of broken concrete, punchouts, longitudinal cracking, and sags. The failure mechanism of each distress was established using pavement condition surveys, forensic investigations, coring, and shoulder trenching. The experience gained was translated into changes to include using 4.2-m (14-ft) truck lanes, thicker pavement, a higher percentage of reinforcing steel, steel placed on chairs, transverse steel, larger size aggregate, a lower water/cementitious material ratio, mineral admixtures, adequate consolidation, and dense asphalt drainage layer, supported by an effective edgedrain system. These changes were complemented by an emphasis on quality construction and a smoother ride. These changes were implemented on our most recent project with very promising results.
Presented at the 7th International Conference on Concrete Pavements in 2001.
Authors: Mohamed Elfino, Celik Ozyildirim, and Richard Steele