Abstract: A method for preparing concrete or mortar using a fraction whose particle size d10 is greater than or equal to 150 ?m, the fraction having a loss on ignition varying from 3% to 30% and including: from 20% to 80% SiO2; from 5% to 40% CaO; from 1% to 15% Al2O3; and from 0.5% to 4% Fe2O3.

Abstract: An accelerated carbonatation method including the following steps: a) providing recycled concrete granulates with a grain size smaller than or equal to a value V1 being between 1 mm and 6 mm, in other words a 0/V1 sand; b) performing on the 0/V1 sand a separation step by defining a granulometric cut of a determined value V2 being between 0.1 mm and 0.2 mm so as to obtain: a 1st fraction whose grain size is less than V2, and a 2nd fraction whose grain size is between V2 and V1; c) subjecting the 2nd fraction to an accelerated carbonatation step in a dynamic carbonator so as to obtain carbonated recycled concrete granulates. Also, a method for valorizing concrete wastes and industrial gaseous discharges implementing the accelerated carbonatation method, in particular the gaseous discharges of a cement plant.

Abstract: A method for inerting polluted soil, comprising adding to a polluted soil a composition comprising: from 40% to 99% of a sulfoaluminous clinker comprising as a phase composition, to the overall weight of the clinker: from 5% to 80% of a calcium sulfoaluminate phase possibly iron-doped corresponding to the formula C4AxFy$z in which x varies from 2 to 3; y varies from 0 to 0.5; and z varies from 0.8 to 1.2; from 0 to 25% of a calcium aluminoferrite phase of a composition corresponding to the general formula C6Ax?Fy?; x? varies from 0 to 1.5; and y? varies from 0.5 to 3; and from 10% to 70% of a belite phase C2S; and from 1% to 60% of a lime.

Abstract: The invention relates to a vertical-shaft kiln (2) for manufacturing a clinker, including: a tubular enclosure (4) comprising from top to bottom: a feeder section (14); a decarbonatation section (16) exhibiting a slanted lower surface (16a); a clinkering section (18) exhibiting a slanted lower surface (18a); a first collection section (20) extending substantially vertically; first extraction means (42) arranged for extracting the clinker from the first collection section (20); means arranged for generating a first gas exhibiting a temperature ranging between 950° C. and 1250° C., and for supplying the first gas in the decarbonatation section (16); means arranged for generating a second oxidizing gas exhibiting a temperature ranging between 1250° C. and 1450° C., and for supplying the second oxidizing gas in the clinkering section (18); and first suction means for suctioning the first and second gas from the feeder section (14).

Abstract: The invention relates to a vertical-shaft kiln (2) for manufacturing a clinker, including: a tubular enclosure (4) comprising from top to bottom: a feeder section (14); a decarbonatation section (16) exhibiting a slanted lower surface (16a); a clinkering section (18) exhibiting a slanted lower surface (18a); a first collection section (20) extending substantially vertically; first extraction means (42) arranged for extracting the clinker from the first collection section (20); means arranged for generating a first gas exhibiting a temperature ranging between 950° C. and 1250° C., and for supplying the first gas in the decarbonatation section (16); means arranged for generating a second oxidizing gas exhibiting a temperature ranging between 1250° C. and 1450° C., and for supplying the second oxidizing gas in the clinkering section (18); and first suction means for suctioning the first and second gas from the feeder section (14).

Abstract: The invention relates to a method for manufacturing a sulfoaluminous or belitic sulfoaluminous clinker from a raw mix formed from a mixture including minerals containing calcium, aluminum, silica, iron, and sulfur, preferably in sulfate form, and is characterized in that the method comprises the steps including: at least partially dehydrating and decarbonating the mixture through placement in a vertical kiln (1) comprising a substantially vertical chamber (2) wherein the mixture is heated, the chamber (2) of the vertical kiln (1) being supplied with hot gases the temperature of which is between 900 and 1150° C.

Abstract: The invention relates to a method for manufacturing a sulfoaluminous or belitic sulfoaluminous clinker from a raw mix formed from a mixture including minerals containing calcium, aluminum, silica, iron, and sulfur, preferably in sulfate form, and is characterized in that the method comprises the steps including: at least partially dehydrating and decarbonating the mixture through placement in a vertical kiln (1) comprising a substantially vertical chamber (2) wherein the mixture is heated, the chamber (2) of the vertical kiln (1) being supplied with hot gases the temperature of which is between 900 and 1150° C; extracting the dehydrated and decarbonated mixture from the vertical kiln (1) and conveying the same in a continuous kiln (4) comprising a furnace (5) and a transporting means (6) for transporting the mixture across the furnace (5); heating the mixture from the vertical kiln (1) by passing the mixture through the furnace (5) via the transporting means (6) such that a clinkerization of the mixture is ob