**3.**

**
OPTIMAL DESIGN IN ABRASIVE RESISTANCE**

OF REFRACTORY CONCRETES

T. MATHIA and M.OUADOU

Laboratoire de Tribologie et Dynamique des Systemes - URA 855

Département de Technologie des Surfaces, Ecole Centrale de Lyon

36 Av. Guy de Collongue, 69131 Ecully, FRANCE

** P. LANTERI and R. LONGERAY**

Université C. Bernard Lyon I. & Ecole Chimie Physique Eléctronique de Lyon

Laboratoire de Synthese Organique Appliquée et Chimiométrie

69622 Villeurbanne, FRANCE

** B. CLAVAUD**

Lafarge Réfractaires Monolithiques. Centre de Recherche

69804 Saint Priest, FRANCE

The motivation is to optimise mechanical properties, principally to make
refractory concretes more resistant to abrasive wear process in such industrial
applications as cementry, brick-field, petrochemistry and petroleum refining,
industrial incinerators, iron and steel industry and all metals metallurgy. For
a better understanding of abrasion resistance it was necessary to develop a new
experimental and analytical approach in order to predict its optimum conditions.
A new technique based on a fully computerised sclero-topometer has been adapted
and applied to this type of heterogeneous composites. A strategy of appropirate
experimental measurements has been worked out. The data obtained from
experimental techniques on refractory concretes composed of materials as, AL_{2}O_{3}, SiC,
Chamotte and Bauxite have been interpreted, explored and presented. This paper
summarizes the influence of fundamental parameters for abrasive process applied
to alumina castables only, for different temperatures of firing.