 SummaryThe 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:
|
Constituents
|
AA
|
BB
|
CC
|
DD
|
|
Clinker (K)
|
20
|
42
|
64
|
25
|
|
Slag (S)
|
50
|
40
|
30
|
50
|
|
Limestone filler (L)
|
30
|
18
|
6
|
25
|
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. |