Environmental-Clay-based Concrete

Mariette Moevus-Dorvaux (1) , Lucile Couvreur (1) , Laetitia Fontaine (1) , Romain Anger (1) , Patrice Doat (1) , Lionel Ronsoux (2, 3) , Yves Jorand (2) , Christian Olagnon (2) , Sandrine Maximilien (2)

1 CRAterre - CRAterre
2 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
3 DGCB - Département génie civil et batiment

The C2D2-Environmental-Clay-based Concrete research program, funded by the French Ministry of Ecology for three years, brought together eight partners: research laboratories , material producers, constructors, technical center and educational experimentation center. The challenge was to propose innovative solutions to transform raw earth, a complex and highly variable raw material, into genuine environmental clay-based concretes whose implementation and final properties are controlled. Research has focused on cement concrete and industrial ceramics technology transfer towards a clay-based concrete: the control of granulometry, the use of dispersants and superplasticizers, coagulation techniques to harden the material and enable a rapid removal of the formwork. Exciting developments have been made, like the understanding of the impact of dispersants on the microstructure and final properties of the material. The economic partners had the ambition to commercialize innovative products. A fluid clay-based concrete was formulated from argilo-calcareous fines derived from aggregate washing; an abundant resource so far unused. This clay-based concrete was recently implemented on two construction sites, produced in a batching plant, transported in a mixer truck, poured and vibrated like a cement concrete. This is one of the pioneer experiences in France for an earth-based concrete.

Mots clés: Innovation; Matériaux; Béton d'argile

Domaines: Architecture, aménagement de l'espace

Mariette Moevus-Dorvaux, Lucile Couvreur, Laetitia Fontaine, Romain Anger, Patrice Doat, et al.. Environmental-Clay-based Concrete. Terra 2016, CRAterre, Jul 2016, Lyon, France. pp.208-212. ⟨hal-02930276⟩