ABSTRACT
Concrete repair works involve most of the time the removal of the damaged or contaminated surface layer. It is necessary to assess the effect of that operation (tool, procedure, etc.) upon the integrity of the residual concrete substrate, prior to the placement of the repair material, since it can affect significantly the adhesion of the repair system (Courard & Bissonnette, 2004). A parameter which was very rarely experimentally studied is load eccentricity. The principle of pull-off test is to set a load perpendicularly to investigated surface. Two main reasons may however induce eccentricity: the first is angle of inclination α, caused by inaccurate core drilling. The second is really load eccentricity. It is caused by inaccurate positioning the steel dolly on the top of the core. The main objective of this program was to investigate the influence of load eccentricity on pull-off test, for angles of inclination up to 5°.
