ACI Concrete International · 1998 · 13 citations · 0 references
EngineeringCivil EngineeringMaterials EngineeringBuilding MaterialsStructural EngineeringStructural MaterialsAdhesive BondingConcrete ConstructionConcrete MaterialsReinforced Concrete StructuresBondingConcrete Structure RepairConcrete Surface FinishesDelaminationOverlay DesignRepair Of Reinforced Concrete
In the repair and rehabilitation of concrete structures, additional concrete is often placed on existing concrete in the form of an overlay or augmentation. The performance of the new composite is directly dependent upon good bond and full transfer of shear stresses at the interface of the new and old concrete. It is well understood that a clean and well-textured prepared surface at the bond line is essential to obtain good bond. However, not as well known is the fact that while certain equipment can provide surfaces for good bonding, other techniques can produce inadequate surfaces resulting in poor bond or possible delamination. The latter methods should be minimized or avoided whenever possible.