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Lafarge patents


Recent patent applications related to Lafarge. Lafarge is listed as an Agent/Assignee. Note: Lafarge may have other listings under different names/spellings. We're not affiliated with Lafarge, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "L" | Lafarge-related inventors


Microstructured carbonatable calcium silicate clinkers and methods thereof

The invention provides novel, microstructured clinker and cement materials that are characterized by superior grindability and reactivity. The disclosed clinker and cement materials are based on carbonatable calcium silicate and can be made from widely available, low cost raw materials via a process suitable for large-scale production. ... Lafarge

Low density cementitious compositions for use at low and high temperatures

A cementitious binder, includes a hydraulic binder; a first siliceous based material, which has a (sio2)/(al2o3) ratio by weight greater than 2.5; a second siliceous based material, which is different from the first siliceous based material and has (a) a (sio2)/(al2o3) ratio by weight greater than 10 and (b) a bet specific surface area greater than 5 m2/g; and an aluminum based material, which has a (sio2)/(al2o3) ratio by weight lower than 2.5, wherein 0.09<aleff/(aleff+sieff)<0.28, where aleff=molar content of alumina in the hydraulic binder, and sieff=molar content of silica in the first siliceous based material for particles having a size lower than 3 μm+molar content of silica in the second siliceous based material.. . ... Lafarge

A hydraulic composition for the construction of pavements

A hydraulic composition for the construction of pavements, and in particular for the repair of pavements, includes a hydraulic binder including a cement, 0.18% to 0.35% of a superplasticiser, where the percentage is expressed by dry weight compared to the cement, and where the superplasticiser includes a branched polymer including at least one pendant chain, with a terminal function of the phosphonate or phosphate type, and 0.25% to 2% of a setting accelerator, where the percentage is expressed by dry weight compared to the cement, where the setting accelerator includes a calcium salt, where the hydraulic composition has a water/cement ratio higher than 0.38 and strictly less than 0.45.. . ... Lafarge

Novel hydraulic binder and hydraulic composition comprising same

A hydraulic binder which includes a clinker with a specific shape, the clinker including as main phases, given as weight percentages relative to the total weight of the clinker: (i) 70 to 95% of a belite phase having a particle size such that the dv50 ranges from 5 to 15 μm; (ii) 5 to 30% of a calcium aluminoferrite phase; and (iii) less than 5% of minor phases; the clinker having an al2o3/fe2o3 weight ratio of less than 1.5; and the clinker including less than 5% of alite phase and less than 5% of calcium sulphoaluminate phase; and at least 0.5% dry weight of an activator made of calcium sulphate, as a weight percentage relative to the total weight of phases (i) to (iii).. . ... Lafarge

Method for the continuous production of a low-density mineral foam

A method for the continuous production of a mineral foam of which the density in the dry state (d) is from 40 to 600 kg/m3, includes (i) mixing cement; a water reducing agent; 0.5 to 10%, % by weight with respect to the total weight of cement, of ultrafine particles having a liquid-solid contact angle comprised from 30° to 140°, and of which the d50 is from 10 to 600 nm; water, with a water/cement weight ratio from 0.3 to 2.5; (ii) adding to the mixture from 0.5 to 10% of a pore-forming agent, % by weight with respect to the weight of cement; (iii) applying the mixture obtained at step (ii) on a support; (iv) leaving the mixture to expand on the support.. . ... Lafarge

Oxy-calcination process

Method and installation for calcining cement raw meal in a calciner whereby fuel and a calciner oxidant having an oxygen content of at least 30% vol are introduced into the calciner so as to generate either an oxidant-lean zone or a fuel-lean zone in the calciner located between the lowermost fuel inlet level and the lowermost oxidant inlet level of the calciner, between 50% and 100% by weight of the raw meal being supplied to the calciner upstream of and/or within the oxidant-lean, respectively the fuel-lean zone.. . ... Lafarge

Ultra-light mineral foam and method for producing same

A method for producing a mineral foam includes: (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 including a soluble equivalent quantity x of na2o, x being expressed by weight for 100 parts cement, the slurry having a ratio x/(e/c) less than or equal to 1.75, e/c being expressed by weight, and the particles of cement c having a size distribution such that the particle size distribution ratio dmax(h/2)/dmin(h/2) is between 5 and 25; (ii) bringing the cement slurry into contact with the aqueous foam in order to obtain a foamed cement slurry; and (iii) shaping the foamed cement slurry obtained in step (ii) and allowing setting to take place.. . ... Lafarge

Ultra-high performance concretes having a low cement content

A hydraulic binder includes, as percentage by mass: from 17 to 55% of a portland cement, the particles of which have a d50 of from 2μm 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 sum of these percentages being from 80 to 100%; the sum of the percentages of cement and of silica fume being greater than 28%; the mineral addition a1 being selected from slags, pozzolanic additions or siliceous additions such as quartz, silico-calcareous mineral additions, calcareous additions such as calcium carbonate or mixtures thereof.. . ... Lafarge

Novel ultra-high performance concrete

A hydraulic composition includes in relative parts by mass with respect to the cement 100 parts of cement the particles of which have a bet specific surface area comprised from 1.20 to 5 m2/g; 32 to 42 parts of water; 5 to 50 parts of a mineral addition a1 the particles of which have a d50 less than or equal to 6 μm and selected from silica fume, metakaolin, slag, pozzolans or mixtures thereof; 90 to 230 parts of sand the particles of which have a d50 greater than or equal to 50 μm and a d90 less than or equal to 3 mm; 0.0001 to 10 parts of a superplasticizer, the active material concentration of which is 15% by mass.. . ... Lafarge

Photovoltaic concrete, its method of manufacture and construction element including such a concrete

A concrete having a smooth surface, which is wholly or partly coated with a polymer film obtained by polymerisation under the action of radiation, where the film is itself wholly or partly coated with a thin photovoltaic film.. . ... Lafarge

Ultra-high performance non-self-consolidating concrete

A hydraulic binder includes in mass percent from 20 to 82% of a portland cement the particles of which have a d50 comprised from 2 μm to 11 μm; from 15 to 56% of a non-pozzolanic mineral addition a1, the particles of which have a d50 from 1 to 150 μm and selected from among limestone additions, siliceous additions, siliceous limestone mineral additions, calcined shales, zeolites, burnt plant ashes, and mixtures thereof; from 4 to 30% of pozzolanic mineral addition a2, the particles of which have a d50 from 1 to 150 μm; a sum of the percentages of the portland cement, the non-pozzolanic mineral addition a1 and the pozzolanic mineral addition a2 being comprised from 90 to 100%.. . ... Lafarge

Belite sulfoaluminate binder

A hydraulic binder includes a belite sulfoaluminate clinker and silica having a bet specific surface area in nitrogen of at least 50 m2/g, the quantity of silica being lower than or equal to 5%, the percentage being expressed as a mass percentage in relation to the mass of the binder.. . ... Lafarge

Method for producing an insulating composite building block

A method for producing an insulating composite block including a mineral foam, includes: providing a block including at least one cell having walls which are either sufficiently humid or consist of a water-repellent material, and b. Filling the cell with a mineral foam that does not substantially include any calcium aluminate.. ... Lafarge








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