Abstract: A hydraulic binder includes, in parts by mass: (a) from 20 to 60 parts of Portland clinker; (b) from 20 to 40 parts of slag; and (c) from 0 to 60 parts of inorganic material other than the clinker and the slag; the sum of (a), (b) and (c) being equal to 100 parts; which binder further includes a slag activator including, relative to 100 parts of the sum of (a) and (b): from 1.4 to 6.55 parts of alkali metal salt, expressed as equivalent-Na2O; and from 1.1 to 11.0 parts of calcium sulfate, expressed as SO3.

Abstract: A hydraulic binder includes, in parts by mass: (a) from 20 to 60 parts of Portland clinker; (b) from 20 to 40 parts of slag; and (c) from 0 to 60 parts of inorganic material other than the clinker and the slag; the sum of (a), (b) and (c) being equal to 100 parts; which binder further includes a slag activator including, relative to 100 parts of the sum of (a) and (b): from 1.4 to 6.55 parts of alkali metal salt, expressed as equivalent—Na2O; and from 1.1 to 11.0 parts of calcium sulfate, expressed as SO3.

Abstract: A gypsum slurry mixer includes a stationary part delimiting a mixing chamber including an upper part with a supply orifice, a lower part, a lateral part with an outlet orifice defining on the lateral part two end points and the outlet orifice is located within the angular sector formed by the centre of the stationary part and by the 2 points; a smooth movable part having an axis of rotation arranged in the stationary part; and an outlet system including a tubular element oriented tangentially to the stationary part along an axis of which the projection in a plane perpendicular to the axis of rotation is located within the sector formed by the acute angle between the projections, in the perpendicular plane, of the two tangents to the lateral part passing through the end points; and a collecting element.

Abstract: An aqueous slurry including a particulate pozzolan, different from silica fume, which pozzolan includes less than 80% silicon dioxide, and, optionally, a particulate substantially inert filler: wherein the dry matter content of the slurry is from 30% to 90% by weight; substantially all of the elementary particles of pozzolan and filler have an elementary particle size less than 100 ?m; and the particles have a mean particle size less than 15 ?m.