Experimental set-up for mortar / brick interface strength characterization at high temperature

Jérôme Brulin (1, 2) , Eric Blond (1) , Emmanuel de Bilbao (3) , Amna Rekik (1) , Matthieu Landreau (4) , Alain Gasser (5) , Yannick Colleville (1)

1 PRISME - Laboratoire Pluridisciplinaire de Recherche en Ingénierie des Systèmes, Mécanique et Energétique
2 CREE - Centre de recherche et d'étude européen
3 CEMHTI - Conditions Extrêmes et Matériaux : Haute Température et Irradiation
4 CPM - Centre de Pyrolise de Marienau
5 F2ME

The interface between bricks and mortar is often the weakest part of refractory masonries. Then, the prediction of the refractory lining damage requires the knowledge of the strength of this interface at high temperature. This paper proposes to use a slant shear test and a new tensile test device to characterize the brick/mortar interface from room temperature up to 1450°C. The slant shear test allowed measuring ultimate compressive and shear stresses and deducing temperature dependent parameters of Mohr-Coulomb failure criterion. The tensile test allowed identifying the tensile cut-off. For materials tested with these set-ups, internal friction angle shows a weak dependence on temperature, while cohesion and tensile strength decrease sharply over 900°C.

Domaines: Matériaux et structures en mécanique [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]

Jérôme Brulin, Eric Blond, Emmanuel de Bilbao, Amna Rekik, Matthieu Landreau, et al.. Experimental set-up for mortar / brick interface strength characterization at high temperature. UNITECR'11, Oct 2011, Kyoto, Japan. pp.CD-ROM. ⟨hal-00651606⟩