[en] The study of adhesion of repair materials on concrete structures implies a good knowledge of the influence of concrete surface characteristics. A large research project has been realized with regards to the influence of concrete substrate strength and preparation technique efficiency. Three types of concretes and four types of surface preparation have been combined in order to obtain twelve different concrete slabs. They have been characterized according different destructive and non destructive techniques: Schmidt hammer, compressive strength, superficial cohesion (pull-off tests), Impact Echo measurements and cracking quantification (microscopical observations). Finally, a polymer cement concrete mortar has been applied and adhesion has been evaluated by means of pull-off and laboratory tensile tests. The relationships between parameters describing surface quality (roughness, cracking), adhesion strength and stress wave propagation have been analysed.
Disciplines :
Civil engineering
Author, co-author :
Courard, Luc ; Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Garbacz, A.
Schwall, D.
Piotrowski, T.
Language :
English
Title :
Effect of concrete substrate texture on the adhesion properties of PCC repair mortar
