01372849

Component

Crack, seat and overlay (CS&O) is a technique used to rehabilitate Jointed Plain Concrete Pavements (JPCP). The intent of cracking a deteriorated concrete pavement is to create shorter concrete pieces, which helps to reduce horizontal slab movements and to minimize the risk of reflective cracking. Seating after cracking is intended to reestablish the support between the broken slabs and the subbase/subgrade. During the past 20 years, hundreds of highway miles nationwide have been rehabilitated using this technique. The objective of this study is to evaluate the CS&O rehabilitation technique employed in California. CS&O sections in three geographical regions in California were selected and their performance evaluated. Statistically significant difference was observed in terms of alligator (fatigue) cracking and surface roughness. No statistically significant difference was observed in the performance in terms of reflective transverse and longitudinal cracks. The fabric layer placed atop the leveling course is believed to improve resistance to reflective cracking regardless of the geographical sections location. This study recommends evaluating the effect of subgrade type/condition and the condition of concrete slabs (before being cracked and seated) on sections performance.

This paper was sponsored by TRB committee AFD70 Pavement Rehabilitation

01362476

12-1460

English

15p

2012

Transportation Research Board 91st Annual Meeting

Digital/other

Figures; References; Tables

Cracking of concrete pavements; Deterioration; Overlays (Pavements); Rehabilitation; Slabs

Jointed plain concrete pavements

California

Highways; Maintenance and Preservation; Pavements; I60: Maintenance

Transportation Research Board Annual Meeting 2012 Paper #12-1460

TRIS, TRB

Feb 8 2012 5:02PM