Réparations et recherche:
une nécessité
Luc COURARD
Université de Liège, Belgique
Nouvelle norme EN 1504 FEREB
Liège, 14 novembre 2012 Génie Minéral Matériaux & Environnement
Le sort des nations qui négligent la
science et les savants est marque
Thématiques de recherche
Adhérence Adhésion spécifique Equilibre thermodynamique Interactions physico-chimiques Liaisons chimiques Adhésion mécaniqueEvaluation of thermodynamic properties of concrete substrates and cement slurries modified with admixtures. L. Courard. Mater. Struct.,
35 (April 2002) 149-155.
Compatibilité des produits
SOLID (S) γSV γSL LIQUID (L) VAPOUR (V) γLV θ
Concrete surface roughness characterization by means of opto-morphology technique. L. Courard, D. Schwall and T. Piotrowski. Monography: Adhesion in Interfaces of Building Materials: a Multi-Scale Approach (AMSR Advances in Material Science and
Restoration, Eds. L. Czarnecki and A. Garbacz, Aedificio Publishers) (2007) 107-116.
Evaluation de la rugosité
Topography evaluation methods for concrete substrates: parametric study. L. Courard, A. Garbacz and B. Bissonnette. ICCRRR12 International Congress on Concrete Repair, Reinforcement and Retrofitting, (Alexander et al (eds), 2012 Taylor & Francis Group, London), Cape Town (2012), pp379.
Comparaison des méthodes d’évaluation de
la rugosité
Surface Rough Index vs arithmetic mean of waviness for mechanical (p,∆) and laser (s,•) profilometers
Essai dérivé de l’essai d’adhérence pour la caractérisation de la cohésion superficielle des supports en béton dans les travaux de réparation : analyse des paramètres d’essai. L. Courard et B. Bissonnette. Mater. Struct., 37(269) (2004) 342-350.
Mesure de la cohésion superficielle
Evaluation of the effect of load eccentricity on pull-off strength . G. Moczulski, A. Garbacz and L. Courard. ICCRRR08 International Congress on Concrete Repair, Reinforcement and Retrofitting,
(Alexander et al (eds), 2009 Taylor & Francis Group, London), Cape
Town (2008) 1017-22.
Eccentricité du pull-off test
Percentage of variation of pull-off strength vs reference (%) Concrete type Core depth 15mm (0.59 in.) Core depth 30mm (1.18 in.) 2° 4° 2° 4° C30/37 8 5 6 6 C40/50 8 10 3 -6 C50/60 3 13 6 12
Effect of concrete surface treatment on adhesion in repair systems, A. Garbacz, M. Gorka and L. Courard. Mag. Concrete Res., 57(1) (2005) 49-60.
Effets de la rugosité sur l’adhérence
0.00 0.50 1.00 1.50 2.00 2.50 3.00
polishing sandblasting scabbling hydrodemolition
Type of surface treatment
p u ll -o ff s tr e n g th [ M P a ] C30 C40 C50 Mean :
Concrete removal techniques: influence on residual cracking and bond strength. B. Bissonnette, L. Courard, A. Vaysburd and N. Bélair. Concrete International, 28(12) (2006) 49-55.
Technique de préparation de surface
1,0 1,5 2,0 2,5 3,0 d h é re n c e ( M P a ) NAT SCA-SAB HYD MPS7 MPS14
Roughness?
Cohesion?
Concrete removal techniques: influence on residual cracking and bond strength. B. Bissonnette, L. Courard, A. Vaysburd and N. Bélair. Concrete International, 28(12) (2006) 49-55.
Technique de préparation de surface
81.9 99.9 117.4 9.4 28.7 11.4 4.4 26.8 0 20 40 60 80 100 120 140 MPS7 MPS14 MPS21 P H SA SC V L o n g u e u r to ta le d e s f is s u re s ( m m )
Saturation level of the superficial zone of concrete and adhesion of repair systems. L. Courard, J. F. Lenaers, F. Michel and A. Garbacz. Construction and Building Materials 25 (5) (May 2011) 2488-2494.
Saturation du support
0 0,5 1 1,5 2 2,5 3 0,0 20,0 40,0 60,0 80,0 100,0 120,0 Saturation level (%) A b s o rp ti o n c o e ff ic ie n t (L o g (m g /s ^ 0 .5 )) . HD SB NT lin HD lin SB lin NT Mortars A and B 0 1 2 3 4 40 50 60 70 80 90 100 110Water Saturation rate (%)
Design of a Self Compacting Repair Mortar to be applied under
concrete slabs and floors. St. Flamant and L. Courard. In: 2ndRILEM
Symposium Advances in Concrete through Science and Engineering, Québec, Canada (September 11-13, 2006).
Développement de SCRM
Flow trough test (EN 13395-2)
Distance en cm
Electromagnetic field amplitude
E R
Analyses non destructives
Static Detection of Thin Layers into Concrete with Ground Penetrating Radar. A. Van der Wielen, L. Courard, F. Nguyen. Restoration of Buildings and Monuments 18 (3/4) (2012) 247–254.
Comparison of destructive methods to appraise the mechanical integrity of a concrete surface. L. Courard, B. Bissonnette, A. Vaysburd, N. Belair and F. Lebeau. Concrete Repair Bulletin 25(4) (July-August 2012) 22-30
Auscultation et méthodes semi-destructives
SB = sablage
CB9 = marteau-piqueur (9kg) CB11 = marteau-piqueur (11kg) CB34 = marteau-piqueur (34kg)
Churches and concrete in Liège district: history, architecture and pathologies. A. Gillard, L. Courard and P. Paquet. Restoration of Buildings and Monuments 17 (1) (2011) 3–14.
Monuments historiques
Eglise Saint-Vincent, Liège
Structure en béton armé supportant le dôme, église
Bonded cement-based material overlays for the repair, the lining or the strengthening of slabs and pavements. B. Bissonnette, L. Courard, D.W. Fowler and J.L. Granju. RILEM STAR Report Volume 3, 193-RLS RILEM TC (Springer, Dordrecht), 2011,175p.
