The invention provides a ductile ultra-high performance concrete which comprises in relative parts by weight: 100 of Portland cement; 50 to 200 of a sand having a single grading with a D10 to D90 between 0.063 and 5mm, or a mixture of sands, the finest sand having a D10 to D90 between 0.063 and 1mm and the coarsest ...

The present invention relates to a process for the production of a hydraulic binder said process comprising co grinding a clinker and 0.1 to 5% by dry mass relative to the mass of clinker of a material comprising more than 15% by mass of calcium silicate hydrate relative to the solid fraction of the material. ...

The present invention relates to a treatment method for manufacturing a hydraulic composition having entrained air said hydraulic composition including at least one additive and a component including carbon materials. The method includes: obtaining a value representing the adsorption of molecules sought by the carbo...

The present invention relates to the use of carbon materials as an inertant for treating at least one component of a hydraulic composition including at least one air entraining agent. Said component includes the carbon materials of an additive including at least one polymer including at least one chain having hydrop...

A process for treating a raw steel industry slag, for converting same into a hydraulic binder at least equivalent to a Portland cement clinker, comprising: - an oxidative treatment process with an oxygen or air supply, or their mixture at a pressure ranging from 1 to 15 bars, preferably from 5 and 10 bars, at a tem...

The present invention relates to a hydraulic composition comprising: - at least one hydraulic binder; - at least one first water-reducing additive comprising at least one phosphonic amino-alkylene group; - at least one second water-reducing additive comprising at least one polymer with a comb structure, the conce...

The present invention relates to a hydraulic binder comprising, as percentage by mass: - from 17 to 55% of a Portland cement, the particles of which have a D50 of from 2 μm to 11 μm; - at least 5% of silica fume; - from 36 to 70% of a mineral addition A1, the particles of which have a D50 of from 15 to 150 μm; the s...

The invention relates to an installation for pre calcination (20) of pulverulent mineral materials (22) intended for the production of cement comprising a pre calciner (14) including an enclosure (50) supply ducts (70) of the mineral materials into the enclosure supply ducts (65 66) of hot gases into the enclosure a...

The invention concerns a method for producing a mineral foam comprising the following steps: (i) independently preparing a cement slurry and an aqueous foam, the cement slurry being prepared by mixing water E and cement C, the cement C comprising a soluble equivalent quantity x of Na2O, x being expressed by weight f...

The invention relates to a novel non self levelling ultra high performance hydraulic composition that can be used to produce concrete parts in a single step regardless of the shape or cross section of the part and without requiring an assembly step.

The present invention relates to a process for production of clinker and electricity comprising the following steps:  introduce the raw meal (102,102 ) fuel (121,121 ) and a combustion agent (113,113 ) in at least two precalciners (3,3 ) positioned in parallel  precalcine the raw meal at a temperature of from 750 to...

The invention provides a particulate material for the production of a cement foam which material comprises particles comprising attached to the particle surface a surfactant which renders the particles hydrophilic the surfactant comprising a moiety which is hydrolysable under alkaline conditions which surfactant aft...

The present invention relates to a composition comprising at least, in % expressed by mass relative to the total mass of the composition, - from 0.01 to 3 % of polycarboxylic acid or salts thereof, the said polycarboxylic acid comprising 2 to 4 carboxyl groups per molecule; and - from 97 to 99.99 % of a Belite-Ca...

The present invention relates to the use, during the manufacture of cement, of a composition containing at least one dispersing agent and at least one sacrificial molecule for partially or totally maintaining the properties of the dispersing agent, the composition being in the form of either a liquid solution, an em...

The present invention relates to a compression grinding process of at least one component of a hydraulic binder said process comprising the compression of a bed of material (M) formed by this or these component(s) in a grinding zone (30) said process further comprising the addition of oil to the bed of material via ...

The present invention relates to a grinding process in a grinding unit comprising: • a first shop comprising a first mill (11) and a first separator (12) an outlet from the first mill (11) being connected to an inlet of the first separator (12); • a second shop comprising a second separator (22) and a second mill (2...

The invention provides a dry binder premix comprising, in mass proportions: - Portland clinker in the form of grains having a Dv97 from 10 to 30 [im or having a Blaine specific surface greater than or equal to 5300 cmVg, preferably greater than or equal to 5500 cmVg, the minimum quantity of the said clinker in ma...

The present invention relates to a hydraulic composition for building roads in particular for repairing roads comprising: a hydraulic binder comprising a cement; 0.18 % to 0.35 % of a superplasticiser said percentage being given as a dry weight percentage relative to the cement said superplasticiser comprising a bra...

The subject of the present invention is a section (10) of concrete intended to form a mast (1) for a windmill (2) said section comprising:  a first portion (11) comprising a first flange (11 )  a second portion (12) comprising a second flange (12 )  a prestressing device (20) comprising at least one visible part (22...

The present invention relates to a hydraulic binder comprising: 25 to 60 % by mass of Portland clinker; 5 to 15 % by mass of a first mineral addition selected from: o mineral additions reacting with at least 400 mg/g of CaO according to the method at 90°C described in the NF P 18 513 Standard of December 30 201 1 in...

A bag (10) for a granular material (12) comprising: a body (20) defining a volume and formed of a woven polymer material the body (20) comprising a laminated layer arranged along at least an outer surface (22) of the body (20) located on the opposite side of the volume the body (20) presenting end portions (30) disp...

The invention concerns a method for controlling at least one workability parameter of concrete (14) contained in a container (12) of a mixer ( 11) with a non-vertical axis of rotation. The method comprises the following steps: rotating the container at at least two different rotational speeds; determining, for eac...

The present invention relates to a hydraulic binder comprising in parts by mass: (a) from 20 to 60 parts of Portland clinker; (b) from 20 to 40parts of slag; and (c) from 0to 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 ...

The invention provides a foamed concrete having a density from 100 to 800kg/m comprising by mass relative to the total mass of the concrete:  a cement;  water;  from 0.01 to 5% of a water reducing agent plasticizer or superplasticizer; from 0.45 to 5% of a foaming agent relative to the amount of water;  from 0.01 to...

The invention provides a foamed concrete having a density from 100 to 800kg/m comprising by mass relative to the total mass of the concrete: a cement;  water; from 0.01 to 5% of a water reducing agent plasticizer or superplasticizer;  from 0.45 to 5% of a foaming agent relative to the amount of water; from 0.01 to 5...

The present invention relates to ahydraulic binder comprising a Portland clinker having a Blaine specific surface of 4000 to 5500 cm²/g, from 2.5 to 8 % of sulphate expressed by mass of SO relative to the mass of clinker, from 1.5 to 10 % of calcium nitrite and/or calcium nitrate expressed as anhydrous mass relative...

The invention mainly relates to the use of a (co)polymer having a main chain essentially consisting of (meth)acrylic units and polyoxyalkylated side-chains containing statistically-distributed hydrophobic units as an adjuvant for lowering the viscosity of hydraulic compositions.

The present invention relates to a dry binder premix comprising, in mass proportions: - Portland clinker having a Blaine specific surface area comprised from 4500 to 9500 cm2/g, preferably from 5500 to 8000 cm2/g, the minimum quantity of the said clinker by mass percentage relative to the total mass of the premix...

A subject matter of the invention is a binder premix comprising from 0.2% to 63% of a material of an ultrafine particle size category, comprising individual particles with a D90 value less than 1 µm and/or with a BET specific surface greater than 5 m2/g; from 8% to 63% of selected Portland cement comprising particle...

The invention concerns a method for inciting clays in sand intended for preparing hydraulic compositions, comprising a step which consists in adding to the composition or one of its constituents a cationic polymer having a cationic charge density more than 0.5 meq/g and an intrinsic viscosity less than 1 dg/1. ...

The invention relates to a slag-cement-based hydraulic binder, in which the slag cement contains between 20 and 80 wt.- % of a blast furnace slag or a mixture of same in relation to the total weight of the slag cement. The inventive binder is characterised in that it contains at least one accelerating additive which...

This invention relates to a hydraulic mineral composition wherein it comprises a vitreous or crystallised matrix based on calcium or magnesium silico-aluminates, accounting for at least 25%, and preferably at least 30% by weight of the composition, one or several specific mineral oxides and optionally one or several...

The invention relates to a steel desulphurating agent, characterised in that it comprises compared with the total weight of the agent: atleast10% of SiO2, at least 10% of C2S, at least 35% of at least one calcium aluminate and optionally a calcium silico-aluminate.

The invention provides an admixture for a hydraulic binder composition comprising at least one cationic polymer and at least one anionic polymer, at least one of these polymers having a comb type of structure, wherein the mass ratio of the anionic polymer/cationic polymer is from 99.9/0.1 to 60/40. It also provides...

The present invention concerns a belite-rich sulphoaluminous clinker, a method for producing such a clinker and its use for preparing hydraulic binders, and comprising as a mineralogical formulation: - 5 to 25%, preferably 10 to 20%, of a calcium aluminoferrite phase with a formulation corresponding to the general...

The invention concerns a composition useful for inerting clays in hydraulic compositions, comprising at least 50 wt. % of a cationic polymer having a cationic charge density more than 0. 5 meq/g and an intrinsic viscosity less than Idl/g, as active substance.

This invention concerns process for the treatment of a steel works slag comprising: the injection into the liquid slag of oxygen or a mixture of gases containing gaseous oxygen to mix and oxidise the slag; the addition to and dissolution in the mixed liquid slag of a source of alumina and a source of lime and option...

A concrete in which metallic fibres are dispersed, obtained through mixing with water a composition comprising: a) a cement; b) ultrafine elements with a pouzzolanic reaction; c) granular elements distributed into two granular classes C1 > 1 mm and < 5 mm and C2 ranges from 5 to 15 mm; d) cement additions; e) a...

The invention provides a belite-calcium sulphoaluminate-ferrite (BCSAF) cement composition comprising: a BCSAF clinker which clinker has the following mineralogical composition, based on the total weight of the clinker: 5 to 25%, preferably 10 to 20%, of a calcium aluminoferrite phase having the general formula C2Ax...

The invention concerns a fast binder comprising; cement; at least one superplasticizer; calcium nitrite; and at least one formic derivative. The invention also concerns concrete mixtures obtained from said binder and methods for making same.

The invention concerns a concrete wherein are dispersed metal fibres obtained by mixing with water a composition containing: a) a cement; b) fine elements with pozzolanic reaction; c) granular elements divided into two granular categories C1 > 1 mm and < 5 mm and C2 from 5 to 15 mm; d) cement additives; e) an amount...

The invention provides an aqueous slurry comprising: a particulate pozzolan, different from silica fume, which pozzolan comprises less than 80% silicon dioxide; and, optionally, a particulate substantially inert filler: the dry matter content of the slurry being from 30% to 90%; substantially all of the elementary p...

The present invention relates to a mix comprising at least one hydraulic and/or pozzolanic material and at least one water-soluble cationic polymer, the said cationic polymer having a density of cationic charges greater than 0.5 meq/g and an intrinsic viscosity less than 1 dl/g, the said hydraulic and/or pozzolanic ...

The invention relates to a fast hydraulic binder that includes cement, at least a first super-plasticiser, a calcium salt and at least a second super-plasticiser. The second super-plasticiser is different from the first super-plasticiser and includes a main chain and pending groups connected to the main chain and ad...

The present invention relates to a lightweight plate made of foamed cement.

Mixture for a hydraulic composition comprising: an inerting agent for at least partly neutralizing the deleterious effects of impurities of the hydraulic composition on the workability of the hydraulic composition; a first superplasticizer that differs from the inerting agent; and a second superplasticizer that diff...

The present invention relates to a curing process of a concrete element comprising at least partially coating the element with a curing composition, said composition comprising a solvent and a thickening agent said thickening agent being insoluble at a pH greater than (12) and being soluble in the solvent for a solu...

The invention relates to an insulating construction material with low thermal conductivity comprising vegetal additions , as well as to a process for preparation and to uses of such a material.

The invention provides a mixture comprising in mass proportions: from 0.4 to 4%, preferably from 0.8 to 1.7%, of materials in the ultrafine particle size range, comprising particles with a D90 less than 1 µm and/or with a specific BET surface area greater than 6 m2/g; from 1 to 6%, preferably from 2 to 5%, of Portl...

THE PRESENT INVENTION RELATES TO A HYDRAULIC BINDER COMPRISING IN PARTS BY MASS: (A) 40 TO 70 PARTS OF A PORTLAND CLINKER; (B) 30 TO 60 PARTS OF FLY ASH; (C) OPTIONALLY UP TO 30 PARTS OF AN INORGANIC MATERIAL OTHER THAN CLINKER OR THAN FLY ASH; (D) 2.5 TO 15 PARTS OF AN ALKALI METAL SALT EXPRESSED IN PARTS OF EQUIVA...

The present invention relates to a process for production of insulating mineral foams produced from a slurry of cement and an aqueous foam. The invention also relates to the mineral foam obtained by this process its uses and elements of construction produced with this mineral foam.

The present invention relates to the use of a bag to provide an admixture for a hydraulic composition wherein a wall of the bag comprises a layer said layer comprising a water soluble polymer and wherein an admixture is present in the wall of the bag.

The present invention relates to the use of a composition in the production of cement, said composition - comprising at least one dispersing agent and at least one sacrificial molecule to partially or totally retain the properties of the dispersing agent; - being either in the form of a liquid solution, or an emul...

The present invention relates to a composition comprising at least - a Portland clinker and - a Belite-Calcium-Sulphoaluminate-Ferrite clinker (BCSAF).

The invention relates to a method for producing an insulating composite block comprising a mineral foam said method comprising the following steps: a. providing a block comprising at least one cell having walls which are either sufficiently humid or consist of a water repellent material and b. filling said cell with...