Binder composition comprising fine filler and fine ground granulated blast furnace slag

A binder composition comprising:

• a. between 1% and 30% in dry weight of at least one lime source;
• b. between 5% and 75% in dry weight of ground granulated blast furnace slag;
• c. between 20% and 90% in dry weight of at least one filler;
• d. between 0.1% and 5% in dry weight, relative to the total weight of components a, b and c, of SO3−;
• e. between 0.1% and 1% in dry weight, relative to the total weight of components a, b and c, of at least one water reducer polymer;
• f. between 0% and 2% in dry weight, relative to the total weight of components a, b and c, of at least one activator different from d.;
• said ground granulated blast furnace slag being a particles mixture of:
• between 10% and 100% in weight, in respect with the total weight of the ground granulated blast furnace slag, of particles having a d50 greater than or equal to 1 μm and strictly less than 5 μm,
• between 0% and 90% in weight, in respect with the total weight of the ground granulated blast furnace slag, of particles having a d50 greater than or equal to 5 μm, said filler being a particles mixture of:
• between 10% and 90% in weight, in respect with the total weight of the filler, of particles having a d50 greater than or equal to 0.05 μm and strictly less than 8 μm, and
• between 10% and 90% in weight, in respect with the total weight of the filler, of particles having a d50 greater than or equal to 8 μm and strictly less than 200 μm, measurement of d50 being done by Laser diffraction analysis, by means of Laser diffraction analyzer with a humid way method.