Mechanical behaviour of repair mortars
Résumé
We investigate two repair mortars using mechanical tests specifically developed for this type of material. The first is a fibre reinforced lime-based mortar, which contains thickening agent and limestone additions. The second is a fibre reinforced ordinary mortar, which contains a small quantity of silica fume and additives. The mechanical characterisation of the materials is based on tension, compression and three-point bending tests. The bond between the repair mortars and substrate was investigated by slant shear and flexural bonding tests. The results obtained have demonstrated the influence of the surface roughness and moisture conditions on the bond strength. Finally, scanning electron microscope observations have showed the morphology of the repair mortar-to-substrate interfacial zone.
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