Investigation of Various Factors Affecting Bond in Bonded Concrete Overlays

摘要

Bonded concrete overlays (BCO) are rapidly becoming a preferred strategy forTexas highway rehabilitation projects. These overlays have worked well in most areas, but have had occasional problems with debonding and subsequent cracking. The report describes a large-scale laboratory study of many of the factors that are suspected of influencing the bond between overlays and their substrates. Additionally, several bond strength test methods are compared. The study was made in an effort to provide timely information to the Texas Department of Transportation for assistance in specifications and concurrent construction.