Lafarge

Paris, France
Paris, France

Lafarge is a French industrial company specialising in four major products: cement, construction aggregates, concrete and gypsum wallboard. In 2010 the company was the world's second-largest cement manufacturer by mass shipped behind Holcim. Wikipedia.


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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 a mineral foam that does not substantially comprise any calcium aluminate. The invention also relates to an insulating composite block comprising a block, said block comprising at least one cell having walls optionally comprising a water-repellent material, said cell being filled with a mineral foam that does not substantially comprise any calcium aluminate.


Patent
Lafarge | Date: 2017-02-01

The invention relates to a hydraulic binder comprising a belite sulfoaluminate clinker and silica having a BET specific surface area in nitrogen of at least 50 m/g, the quantity of silica being lower than or equal to 5%, said percentage being expressed as a mass percentage in relation to the mass of the binder.


Patent
Lafarge | Date: 2017-06-07

A process for the production of a mineral foam comprising the following steps:(i) separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry comprises water (W) and Portland cement (C);(ii) contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement;(iii) adding a magnesium salt source in step (i) or before, during or after step (ii);(iv) casting the slurry of foamed cement and leave it to set.


Patent
Lafarge | Date: 2017-06-07

A process for the production of a mineral foam comprising the following steps:(i) separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry comprises water (W) and Portland cement (C) as well as CSH crystallization seeds;(ii) contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement;(iii) casting the slurry of foamed cement and leave it to set.


Patent
Lafarge | Date: 2017-06-07

A process for the production of a mineral foam comprising the following steps:(i) separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry comprises water (W) and Portland cement (C);(ii) contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement;(iii) adding an aluminium salt source before, during or after step (ii);(iv) casting the slurry of foamed cement and leave it to set.


Patent
Lafarge | Date: 2017-06-14

The present invention relates to a method for treatment of a pozzolanic material, comprising a step of bringing the pozzolanic material into contact with an inorganic compound able to release a cation in solution, the mixture of the pozzolanic material and the inorganic compound comprising 1 to 15% water by mass, and the bringing of the pozzolanic material into contact with the mineral compound being performed over a period of at least 1 hour before the use of the treated pozzolanic material.


Patent
Lafarge | Date: 2017-06-28

A bag for containing powdery substances, in particular hydraulic cementing materials such as cement, wherein said bag is made from a water-disintegrable or water-soluble material (1) and comprises an element (5) storing reinforcement fibres, wherein said element (5) is adapted to release the reinforcement fibres upon its disintegration or dissolution in contact with water.


Patent
Lafarge | Date: 2017-04-12

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 for 100 parts cement, said 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.


Grant
Agency: European Commission | Branch: H2020 | Program: IA | Phase: SPIRE-03-2016 | Award Amount: 8.30M | Year: 2016

Europes position in the production of biochemicals from biomass and by-products is limited to a few compounds, while their demand is among the largest in the world. However, Europe has a lot of world leader chemical companies. On the other hand, lignocellulosic waste constitutes one of the most abundant resources without competing with food chain. REHAPs 16 partners aim at revalorizing agricultural (wheat straw) and forestry (bark) waste through its recovery, and primary (sugars, lignin, tannins) and secondary (sugar acids, carboxylic acids, aromatics and resins) processing to turn them into novel materials, and considering Green Building as business case. The project will provide reductions in utilization of fossil resources of 80-100%, and energy utilization and CO2 emissions above 30%. Specifically, building blocks (1,4 and 2,3-Butanediol, estherpolyols), materials (PUs, phenolic resins, modified hydrolysis lignin) and products (wooden boards, insulation foams, cement, adhesive) will be obtained: Isolation of tannins and carbohydrates from forestry waste to turn them into bio-phenolic resins for wooden panels and isocyanate-free polyurethanes (PU) for insulating foams, respectively. Isolation of lignin and carbohydrates from agricultural waste to turn them into bio-phenolic resins for wooden panels and biosuperplasticizers for cement, and estherpolyol PU for adhesives, respectively. Fire retardant lignin and sugar-based additives will be also developed. Developed processing technologies (chemo/thermo/enzymatic and fermentation) will be optimized at pilot scale (TRL6-7) for further exploitation and replication of results. All products will be integrated in a prototype to demonstrate industrial applicability into the Green Construction sector. Throughout the project, Life Cycle and Cost Assessment, market analysis, business plan, waste management strategy and measures for future standardization will be implemented using a systemic perspective approach.


Grant
Agency: European Commission | Branch: H2020 | Program: RIA | Phase: FOF-01-2016 | Award Amount: 4.80M | Year: 2016

Advanced Manufacturing has been highlighted by the EU as one of the key enablers to support and promotion of business research and innovation in key enabling technologies. Therefore, a number of objectives, aligned with pursuing the large scale targets, have been set for advanced manufacturing through four pillars: technology, economic, social and environment. Thus, HINDCON project aims to adapt manufacturing technologies to the construction sector, advancing towards industrialisation and overcoming the limitations of actual approach for introducing Additive and Subtractive Manufacturing in construction activities. The project has a duration of 36 months. The main aim of the HINDCON project is to develop and demonstrate a hybrid machine regarding 3D printing technologies with concrete materials focused on the industrialization of the Construction Industry, delivering to this sector an innovative technology that reduces environmental impact at the same time it reduces dramatically economic costs. The collaborative structure of the project will help to: 1) Integrate different technologies that converge in a hybrid solution. HINDCON all-in-one machine will integrate Additive Manufacturing concrete extruder and Subtractive Manufacturing tool kit with the use of cementitious materials including mass materials with alternatives in concrete and additives, and reinforced with composites. 2) Cover the different aspects concerned (technology, economic, social and environment) and demonstrate the hybrid machine from different perspectives. On the one hand, it includes testing basic capabilities of the integrated prototype in laboratory. On the other hand, it involves the demonstration of the manufacturing system in a relevant environment.

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