Abstract: A dry cementitious material mixture for 3D-printing, includes a hydraulic cement, a mineral component having a BET-specific surface area of 0.5-30 m2/g, and being present in an amount of 3-50% by weight based on the hydraulic cement, an additional material being one of: at least one viscosity enhancing admixture being present in an amount of 0.01-1.5% by weight based on the hydraulic cement, clay being present in an amount of 0.01-5.0% by weight based on the hydraulic cement, and further optionally comprising aggregates.

Abstract: A dry cementitious material mixture for 3D-printing, includes a hydraulic cement, at least one viscosity enhancing admixture, and clay and optionally aggregates, wherein the at least one viscosity enhancing admixture is present in an amount of 0.05-1.5% by weight based on the hydraulic cement and the clay is present in an amount of 0.01-5.0% by weight based on the hydraulic cement.

Abstract: A dry cementitious material mixture for 3D-printing, includes a hydraulic cement, at least one viscosity enhancing admixture, at least one accelerator and aggregates, wherein the at least one viscosity enhancing admixture is present in an amount of 0.05-1.5% by weight based on the hydraulic cement and the at least one accelerator is present in an amount of 0.5-6.0% by weight based on the hydraulic cement.

Abstract: A process for the production of a mineral foam includes separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry includes water and Portland cement as well as calcium silicate hydrate crystallization seeds; contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement; and casting the slurry of foamed cement and leave it to set.

Abstract: A process for the production of a mineral foam includes separately preparing a slurry of cement and an aqueous foam, wherein the cement slurry includes water and Portland cement as well as calcium silicate hydrate crystallization seeds; contacting the slurry of cement with the aqueous foam to obtain a slurry of foamed cement; and casting the slurry of foamed cement and leave it to set.

Abstract: A process for manufacturing an inorganic foam includes (i) separately preparing an aqueous foam and a cement slurry, the cement slurry including water W, a cement C, a water-reducing agent, a water-soluble calcium salt, a water-soluble silicate salt, the calcium/silicon molar ratio being 0.7 to 1.7 and the W/C weight ratio being 0.25 to 0.40, and given that the calcium ion concentration is 0.03 to 0.97%, expressed as weight percent relative to the weight of the cement, and that the silicate ion concentration is 0.04 to 1.67%, expressed as weight percent relative to the weight of the cement; (ii) contacting the cement slurry obtained with the aqueous foam to obtain a foamed cement slurry; and (iii) shaping the foamed cement slurry obtained in step (ii) and allowing setting to occur.

Abstract: A method for producing a composite insulating mineral block, includes providing a mineral masonry block including at least one cell with walls having a water absorption rate of less than 5 g/(m2·s) at 10 minutes, and filling the cell with a mineral cement foam, wherein a cement used to produce the mineral cement foam has an aluminum oxide content of less than 20% by weight of the cement.

Abstract: 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.

Abstract: 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.

Abstract: A method for controlling at least one workability parameter of a concrete contained in the container of a mixer with a non vertical rotational axis, includes making the container turn at least at least two different rotational speeds; determining, for each of the rotational speeds, a rotary drive torque C of the container, a value of shear stress r of the concrete and a speed gradient ? of the concrete according to the following relationships: ?=T(?)·C and ?=G(?). ? where T and G are predetermined functions; determining a relationship of variation of shear stress ? according to the speed gradient ? by extrapolation and/or approximation from the determined values; and providing an indication of the workability parameter of the concrete based on the relationship variation.

Abstract: A method for controlling at least one workability parameter of a concrete contained in the container of a mixer with a non vertical rotational axis, includes making the container turn at at least two different rotational speeds; determining, for each of the rotational speeds, a rotary drive torque C of the container, a value of shear stress ? of the concrete and a speed gradient value {dot over (?)} of the concrete according to the following relationships: ?=T(?)·C {dot over (?)}=G(?)·? where T and G are predetermined functions; determining a relationship of variation of the shear stress ? according to the speed gradient {dot over (?)} by extrapolation and/or approximation based on the determined values; and providing an indication of the workability parameter of the concrete based on the relationship of variation.

Abstract: A method includes providing a hydraulic composition, wherein a setting time of the hydraulic composition is greater than or equal to 12 hours without triggering the setting of the hydraulic composition and a variation of the slump of the hydraulic composition measured according to the EN 12350-2 Standard, is less than 50 mm or a variation of the spread of the hydraulic composition measured with a cone according to the EN 12350-2 Standard, is less than 100 mm for at least 12 hours without triggering the setting of the hydraulic composition; and storing the hydraulic composition in a closed container; wherein storing of the hydraulic composition occurs for at least 12 hours without mixing, after which the hydraulic composition is useable without further mixing.

Abstract: A hydraulic composition including from 220 to 500 kg per cubic metre of fresh hydraulic composition, of a hydraulic binder including Portland cement; from 400 to 1200 kg per cubic metre of the fresh hydraulic composition, of a sand having a D10 greater than 0.1 mm and a D90 less than 6 mm; from 0.1 to 5 % by mass of dry extract relative to the mass of the hydraulic binder of a retarding agent; from 0.05 to 5 % by mass of dry extract relative to the mass of the hydraulic binder of a superplasticizer; and from 0.01 to 2% by mass of dry extract relative to the mass of the hydraulic binder of a rheology-modifying agent.

Abstract: A process for transportation of a fresh hydraulic composition including: from 220 to 500 kg per cubic metre of the fresh hydraulic composition, of a hydraulic binder including Portland cement; from 400 to 1200 kg per cubic metre of the fresh hydraulic composition, of a sand; from 150 to 1000 kg, per cubic metre of the fresh hydraulic composition, of gravel; from 0.05 to 5% by mass of dry extract relative to the mass of the hydraulic binder of a superplasticizer; and from 0.01 to 0.5% by mass of dry extract relative to the mass of the hydraulic binder of a rheology-modifying agent, the transportation taking more than ten minutes without mixing the hydraulic composition.