Project New ternary cement 1

Summary

The European working group « Ad Hoc CEM X » of CEN/TC 51 WG 6 has given the mission to the CRIC-OCCN to characterize a new ternary cement « CEM X » with high limestone filler contents. This project is realised in collaboration with the CRIC-OCCN Testing Department.

The four compositions (AA, BB, CC and DD) of the CEM X which have been manufactured industrially and tested are summarized in the table below:

The performances of these four compositions are compared between them and also with these of the following cements: CEM I, CEM II/B-M (S-L), CEM II/B-L and CEM III/B depending on the type of the test considered.

Three different test programs have been performed:

− Full mechanical and chemical characterization of the cements;

− Comparative study of the following performances:

+ Mechanical on concrete (density, compression, traction, Young-modulus, shrinkage, creep …);

+ Durability (Carbonation, Freeze-Thaw using two methods, Chloride diffusion in concrete and Sulphate Resistance on mortar).

A common technical report CRIC-OCCN - Lafarge has been edited and validated by the European working group at the end of 2011. The 2 partners present the results of the cements obtained respectively by co-grinding at Holcim Haccourt and recomposed in the lab. All the results of the physic-chemical characterization and mechanical tests on cement, the mechanical and durability tests on concrete manufactured with the same cements are presented, together with the ones on the reference cements.