Use Of Phospho Magnesium Compounds as Concrete Repair

Christophe Baux (1) , Christophe Lanos (1) , Yannick Mélinge (1) , Laurent Molez (1) , Raoul Jauberthie (1)

1 LGCGM - Laboratoire de Génie Civil et Génie Mécanique

Phospho magnesium compounds are tested to repair different typologies of concrete elements prepared with different surface roughness. Mechanical tests (flexion tests) show that rupture is logically conditioned by the type of preparation. SEM observations are realised along the rupture plan. The phosphate binder crystallized phases at the interface are very dense. When repaired surface is rough , the adhesion between the two phases (phosphate binder and Portland cement paste) is quite correct.

Mots clés: Concrete repair; phospho magnesium binder; SEM; X-ray diffraction

Domaines: Construction durable; Matériaux composites et construction; Réhabilitation

Christophe Baux, Christophe Lanos, Yannick Mélinge, Laurent Molez, Raoul Jauberthie. Use Of Phospho Magnesium Compounds as Concrete Repair . Structural Faults and Repair 2008, Jun 2008, Edinburgh, United Kingdom. ⟨hal-01421247⟩