FOUCHAL, FAZIA 1; GOUNY, FABRICE 2,3; MAILLARD, PASCAL 3; ULMET, LAURENT 1; ROSSIGNOL, SYLVIE 2

1) Université de Limoges- Groupe d’Etude des Matériaux Hétérogènes (GEMH -MMGD), Boulevard Jacques Derche, 19300 Egletons, France, fazia.fouchal@unilim.fr, laurent.ulmet@unilim.fr

2) Ecole Nationale Supérieure de Céramique Industrielle – Groupe d’Etude des Matériaux Hétérogènes (GEMH -MMGD),12 rue Atlantis, 87068 Limoges, France. Fabrice.gouny@unilim.fr, Sylvie.rossignol@unilim.fr

3) Centre Technique de Matériaux Naturels de Construction (CTMNC), Research and development department, Ester Technopole BP 26929 87069 Limoges Cedex. p.maillard@ctmnc.fr

The present study discusses the development of a new geopolymer binder able to better bond the earth to wood while respecting the construction and comfort requirements of building. This work is particularly focused on the understanding of mechanical behavior and hydric transfers in a new construction system composed with geopolymer binder, wood and extruded earth brick. First, the double shear and pullout tests are performed on samples made with two different types of extrusion-manufactured industrial earth bricks in order to describe the interface mechanical behavior between earth brick -binder and wood. Secondly, a wall at real scale (2.40 x 2.50 m2) is tested in double climatic chamber under several humidity conditions in the aim to determine its hydric performances.

Keywords: Masonry, earth brick, geopolymer binder, wood, Interface, mechanical and hydric behavior.