RESONABLE BONDING PROCEDURES BETWEEN NEW AND EXISTING LAYERS OF THIN BONDED CONCRETE OVERLAY PAVEMENT

Abstract

Bonded concrete overlay is considered as an advantageous method from an economical point of view, when rehabilitating structurally sound concrete pavements. However, it is difficult to secure the bonding between overlay layer and existing concrete slab. Two treating techniques for existing slab surface were studied to obtain the sufficient bonding strength between them, by both strength tests and long term observation of the experimental constructions. Finite element analyses were conducted to clarify the reasons of observed distress and determine the required bonding strength. Finally, the optimum procedures to treat the existing concrete slab were proposed.