[en] Appropriate surface saturation level is essential for the durability of the repaired structure. The repair material is often blamed for ‘‘not sticking’’, although the general source of the trouble lies with the substrate surface conditioning. An extensive research project has been undertaken to develop specifications and performance criteria for surface preparation of concrete substrates. A field test was developed to evaluate the optimum moisture conditioning of the substrate concrete prior to application of repair material; this has been calibrated and compared with destructive and non-destructive on three types of concrete and two types of surface preparation. In order to evaluate different saturation levels, concrete samples have been stored in more than 12 modes of conservation. Finally, repair mortars have been applied on concrete substrates and adhesion was measured for different concrete surface saturation levels.
Initial Surface Absorption Test (ISAT) can be used as an attractive quantitative test to evaluate saturation level of concrete substrate. Moreover, it is clearly shown that saturation levels higher than 50% and lower than 90% are requested for promoting adhesion of PCC mortars.
Disciplines :
Civil engineering
Author, co-author :
Courard, Luc ; Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Lenaers, Jean-François; SNCB > Infrastructures
Michel, Frédéric ; Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Garbacz, Andzej; Warsaw University of Technology
Language :
English
Title :
Saturation level of the superficial zone of concrete and adhesion of repair systems
Courard L, Degeimbre R, Darimont A, Wiertz J. Influence of composition of repairing mortars on adhesion. In: van Gemert D, editor. Proceedings of the VIII international congress on polymers in concrete (KULeuven en KVIV), Oostende, 1995. p. 119-24.
Pareek SN. Improvement in adhesion of polymeric repair and finish materials for reinforced concrete structures. Doctorate Dissertation, Nihon University, College of Engineering (Japan); 1993. 182p.
Courard L, Degeimbre R, Darimont A, Wiertz J. Hygro-thermal application conditions and adhesion. In: Seidler P, editor. Proceedings of the fifth international colloquium industrial floors '03 (Technische Akademie Esslingen), Ostfildern/Stuttgart; 2003. p 137-42.
Courard L, Darimont A. Appetency and adhesion: analysis of the kinetics of contact between concrete and repairing mortars. In: Katz A, Bentur A, Alexander M, Arliguie G, editors. Proceedings of the RILEM international conference, interfacial transition zone in cementitious composites. Haïfa: E&FN Spon; 1998. p 185-94.
Courard L, Degeimbre R, Darimont A, Wiertz J. Effects of sunshine/rain cycles on the behaviour of repair systems. In: Ohama Y, Puterman M, editors. ISAP 99, proceedings of the 2nd international RILEM symposium on adhesion between polymers and concrete, Dresden, 1999. p. 511-21.
B. Bissonnette, L. Courard, A. Vaysburd, and N. Bélair Concrete removal techniques: influence on residual cracking and bond strength Concr Int 28 12 2006 49 55
Courard L. How to analyse thermodynamic properties of solids and liquids in relation with adhesion? In: Ohama Y, Puterman M, editors. ISAP 99, proceedings of the 2nd international RILEM symposium on adhesion between polymers and concrete, Dresden; 1999. p. 9-20.
L. Courard Parametric study for the creation of the interface between concrete and repair products Mater Struct 33 2000 65 72 (Pubitemid 30558287)
Courard L, Degeimbre R, Wiertz J. The behaviour of coatings on concrete substrates in relation with different forms of water attack. In: Gjorv OE, Sakai K, Banthia N, editors. CONSEC '98, proceedings of the 2nd international conference on concrete under severe conditions. Tromso: E&FN Spon; 1998. p. 997-1006.
J. Comyn Contact angles and adhesive bonding Int J Adhes Adhes 12 3 1992 145 149
Courard L, Degeimbre R, Darimont A, Wiertz J. Effects of environment on repair materials: results of a five-year research project. In: Malhotra VM, editor. Proceedings of the sixth canmet/ACI international conference on durability of concrete (SP212-57), Thessaloniki; 2003. p. 921-40.
Courard L, Degeimbre R, Wiertz J, Van de Put M. Analysis of the resistance to water of the interface between concrete and repairing systems: experimental approach. In: Gjorv OE, Sakai K, Banthia N, editors. E &FN SponCONSEC '98, proceedings of the 2nd international conference on concrete under severe conditions, Tromso; 1998. p. 988-96.
L. Courard Evaluation of thermodynamic properties of concrete substrates and cement slurries modified with admixtures Mater Struct 35 2002 149 155 (Pubitemid 34684416)
W. Gutowski The relationship between the strength of an adhesive bond and the thermodynamic properties of its component Int J Adhes Adhes 7 4 1987 189 198 (Pubitemid 18535149)
W. Posart, and H. Kamuzewitz The thermodynamics and wetting of real surfaces and their relationship to adhesion Int J Adhes Adhes 13 2 1993 77 84
Permeability testing on site concrete. A review of methods and experience. Concrete society technical report, 31. London: Concrete Society Working Party; 1987.
L. Courard, and R. Degeimbre A capillary suction test for a better knowledge of adhesion process in repair technology Can J Civil Eng 30 6 2003 1101 1110 (Pubitemid 38454201)
Courard L, Lenaers JF. Evaluation of saturation and microcracking of the superficial zone of concrete: new developments. In: Alexander et al., editor. Proceedings of the ICCRRR08 international congress on concrete repair, reinforcement and retrofitting 2009. London, Cape Town: Taylor & Francis Group; 2008. p. 977-82.
CNS Electronics Ltd., Autoclam.
Justnes H. Capillary suction of water by polymer cement mortars. In: van Gemert D, KULeuven en KVIV, editors. Proceedings of the RILEM symposium on properties and test methods for concrete-polymer composites, Oostende; 1995. p. 29-37.
