Extrusion Criterion for Firm Cement‐Based Materials

Arnaud Perrot (1) , Yannick Mélinge (2) , Damien Rangeard (2) , Patrice Estellé (2) , Christophe Lanos (2)

1 LIMATB - Laboratoire d'Ingénierie des Matériaux de Bretagne
2 LGCGM - Laboratoire de Génie Civil et Génie Mécanique

The stability of the flow induced by extrusion forming process of a cement based material is largely influenced by the relative migration between lubricating liquid phase and granular skeleton. In the present work, we propose to link rheology and soil mechanics concepts (consolidation theory, Darcy's law) to reach a simple criterion which predicts the extrusion ability of the mortar. Extrusion tests on cement pastes performed at different ram velocities allow validating the criterion.

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Arnaud Perrot, Yannick Mélinge, Damien Rangeard, Patrice Estellé, Christophe Lanos. Extrusion Criterion for Firm Cement‐Based Materials. THE XV INTERNATIONAL CONGRESS ON RHEOLOGY: The Society of Rheology 80th Annual Meeting, Aug 2008, Monterey, United States. pp.96-98, ⟨10.1063/1.2964911⟩. ⟨hal-00672906⟩