Binder composition comprising pozzolanic material and fine filler
A binder composition in dry weight percentage comprising a) between 1% and 30% of Portland cement, lime or a mixture thereof, b) between 1% and 40% of ground granulated blast furnace slag, c) between 20% and 50% of at least one pozzolanic material, d) between 20% and 65% of at least one filler, e) between 0.5% and 10%, relative to the total weight of components a, b, c, and d, of at least one activator, f) between 0.05% and 1.5%, relative to the total weight of components a, b, c and d, of at least one water reducer polymer, the filler being a mixture between 10% and 90% in weight of particles having a d 50 ≥0.05 μm and <8 μm, and between 10% and 90% in weight of particles having a d 50 ≥8 μm and <200 μm, the filler mixture weight percentages in respect to total weight of the filler.
1 . A binder composition comprising:
a. between 1% and 30% in dry weight of Portland cement, lime or a mixture thereof;
b. between 1% and 40% in dry weight of ground granulated blast furnace slag;
c. between 20% and 50% in dry weight of at least one pozzolanic material;
d. between 20% and 65% in dry weight of at least one filler;
e. between 0.5% and 10% in dry weight, relative to the total weight of components a, b, c and d, of at least one activator;
f. between 0.05% and 1.5% in dry weight, relative to the total weight of components a, b, c and d, of at least one water reducer polymer;
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 d 50 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 d 50 greater than or equal to 8 μm and strictly less than 200 μm, measurement of d 50 being done by Laser diffraction analysis by means of Laser diffraction analyzer with a humid way method.
2 . The binder composition according to claim 1 , wherein the pozzolanic material is selected from the group consisting of silica fumes, fly ashes, calcinated schists, metakaolin, calcined illite, calcined bentonite, calcined montmorillonite, calcined smectite, biomass ashes, rice husk ashes, diatomaceous earth, grounded opal, carbonated basic oxygen furnace slag, carbonated olivine, carbonated wollastonite and mixtures thereof.
3 . The binder composition according to claim 1 , wherein the filler is a natural material.
4 . The binder composition according to claim 1 , wherein the activator is an alkaline metal salt.
5 . The binder composition according to claim 1 , wherein the water reducing polymer is selected from the group consisting of lignosulfonate polymers, melamine sulfonate polymers, naphthalene sulfonate polymers, polycarboxylic acid ether polymers, polyoxyethylene phosphonates, vinyl copolymers, methallyl ether polycarboxylic acid ether and mixtures thereof.
6 . The binder composition according to claim 1 , wherein at least a portion of the ground granulated blast furnace slag has a d 50 less or equal to 2.5 μm.
7 . A dry concrete composition or dry industrial mortar composition comprising at least one aggregate and the binder composition according to claim 1 .
8 . A wet concrete composition or wet industrial mortar composition comprising at least one aggregate, the binder composition according to claim 1 and water.
9 . A hardened concrete composition or hardened industrial mortar composition obtained from the wet concrete composition or the wet industrial mortar composition according to claim 8 .
10 . A process for preparing the wet concrete composition or wet industrial mortar composition according to claim 8 comprising a step of mixing with water, at least one aggregate and a binder composition comprising:
a. between 1% and 30% in dry weight of Portland cement, lime or a mixture thereof;
b. between 1% and 40% in dry weight of ground granulated blast furnace slag;
c. between 20% and 50% in dry weight of at least one pozzolanic material;
d. between 20% and 65% in dry weight of at least one filler;
e. between 0.5% and 10% in dry weight, relative to the total weight of components a, b, c and d, of at least one activator;
f. between 0.05% and 1.5% in dry weight, relative to the total weight of components a, b, c and d, of at least one water reducer polymer;
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 d 50 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 d 50 greater than or equal to 8 μm and strictly less than 200 μm, measurement of d 50 being done by Laser diffraction analysis by means of Laser diffraction analyzer with a humid way method, the binder composition being prepared before the mixing step or in situ during the mixing step from at least some of the components a) to f) of the binder composition taken separately and/or under a form of premix(es).
11 . The process according to claim 10 , wherein a ratio water to binder composition is comprised between 0.1 and 0.5.