Development of Distress Progress Model for Determining the Appropriate Time for Overlaying Durability Cracks in Concrete Pavement

Abstract

As far as concrete is concerned, durability distress such as alkali-silica reaction (ASR) and D-crack is recognized as a big-problem that rapidly degrades the performance. Particularly, in the case of surfaces, the deterioration speed is very fast because of the direct impact of the vehicle load and re-damage occurs quickly even if asphalt patching or concrete partial depth repair is performed. Asphalt overlay has been widely used as a rehabilitation alternative for slowing the distress progress. However, the overlay is required before the distress becomes severe to secure a good performance. The study is aimed to find an appropriate time of overlay and to predict the years of preparation time for the overlay. Through the road surface photography time series analysis, a model predicts how much damage will progress after a year according to the current condition. The appropriate distress area needed to be overlaid is quantified through the panel rating. Through the two results, it is possible to predict how much time remains until the appropriate time to overlay when the current pavement damaged area is known.