It is to provide a powdered-state geopolymer composition comprising an active filler comprising a carbonated slag fine powder and a pozzolanic material powder, an alkali source in a powdered-state comprising at least one selected from alkali metal silicate powder, alkali metal carbonate powder, wherein the carbonated slag fine powder comprises 0.1 mass % or more and 2.0 mass % or less of CO.sub.2, and comprises 0.26 mass % or more and 1.0 mass % or less of bonding water.

The invention relates to a method for the preparation of a carbonated mineral component in particular for the use as a substituent of cement in hydraulic binder compositions wherein a raw material comprising at least one of the group of concrete demolition waste, hardened concrete paste, hardened cement paste, or any mineral component containing hydrated calcium silicates, calcium aluminates is carbonated and heated, a carbonated mineral component manufactured in this way, a method for the preparation of a hydraulic binder using the carbonated mineral component and a cementitious component as well as a concrete composition with that hydraulic binder.

Composite cement containing from 5 to 70 wt.-% cement clinker and from 30 to 95 wt.-% mixture of carbonated or not carbonated recycled cement paste and calcined clay with a weight ratio carbonated or not carbonated recycled cement paste to calcined clay from 4 to 0.1, method for manufacturing it as well as method for manufacturing hydraulically hardening building materials using the composite cement or blending from 5 to 70 wt.-% ground cement clinker with from 30 to 95 wt.-% of a mixture of carbonated or not carbonated recycled cement paste and calcined clay with a weight ratio carbonated or not carbonated recycled cement paste to calcined clay from 4 to 0.1 during mixing.

A method of preparing a high-performance green building material based on combustion flue gas carbon dioxide mineralization, including: calculating a raw material ratio; taking each industrial solid waste material to obtain a solid powder; pouring the solid powder, dihydrate gypsum and gel material into a granulator, mixing uniformly, and then taking a part of the mixture, and then stirring the remaining mixture with deionized water sprayed until spherical kernels are formed, uniformly adding the previously-taken part of mixture to prepare an aggregate; performing hydration reaction on the aggregate; drying the hydrated aggregate to prepare spherical ceramic granules; placing the ceramic granules into a reaction kettle and introducing a combustion flue gas containing CO.sub.2 for mineralization reaction, and taking out reacted ceramic granules and putting into drying oven for drying to prepare a cold-bonded lightweight aggregate; supplementing water to the lightweight aggregate to perform hydration reaction and obtain a finished product.

A method of preparing a high-performance green building material based on combustion flue gas carbon dioxide mineralization, including: calculating a raw material ratio; taking each industrial solid waste material to obtain a solid powder; pouring the solid powder, dihydrate gypsum and gel material into a granulator, mixing uniformly, and then taking a part of the mixture, and then stirring the remaining mixture with deionized water sprayed until spherical kernels are formed, uniformly adding the previously-taken part of mixture to prepare an aggregate; performing hydration reaction on the aggregate; drying the hydrated aggregate to prepare spherical ceramic granules; placing the ceramic granules into a reaction kettle and introducing a combustion flue gas containing CO.sub.2 for mineralization reaction, and taking out reacted ceramic granules and putting into drying oven for drying to prepare a cold-bonded lightweight aggregate; supplementing water to the lightweight aggregate to perform hydration reaction and obtain a finished product.

The present invention relates to a method of capturing carbon dioxide comprising: a) providing a particulate material, wherein the particulate material comprises calcium carbonate and/or titanium dioxide, b) providing a silane, c) providing a surface activator, d) mixing the particulate material and the surface activator to form a surface activated particulate material, e) mixing the silane and the surface activated particulate material to form a mixture, f) mixing water and the mixture to form a composition, g) drying the composition to produce a carrier, and h) treating the carrier with carbon dioxide.

A facility for the forced carbonation of a fine fraction of a recycled concrete, the facility including a carbonation reactor in which the fine fraction is able and intended to be brought into contact with a carbon dioxide-containing gas, a first water-spraying device able to increase the moisture content of the fine fraction, and a conditioning device able to manage the temperature and the relative humidity of the carbon dioxide-containing gas. The facility includes a computer control unit able to control the first spraying device and the device for conditioning the carbon dioxide-containing gas.

Systems and method are provided for a low carbon light weight aggregate made from disk pelletizing biochar; binder; supplementary cementitious material (SCM); fine aggregates; and water.

The invention relates to a method of producing a supplementary cementitious material (SCM) comprising:

a) providing a particulate mineral material;

b) mixing the mineral material with water to form a mixture;

c) milling the mixture in the presence of carbon dioxide to form a slurry, wherein the concentration of carbon dioxide is greater than about 8 vol %; and;

d) drying the slurry to form the SCM.

The present invention relates a mechanochemically carbonated clay. The invention further relates to methods of its production and uses thereof. The invention further relates to compositions comprising the mechanochemically carbonated clay and a further material selected from the group consisting of asphalt, cement, polymers and combinations thereof. The invention further relates to concrete and methods of their preparation.