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 present invention relates to the use of grinding aids comprising Aluminum sulfate, Alum, and/or Na salt, K salt, or Li salt of a hydroxycarboxylic acid, wherein the hydroxycarboxylic acid comprises citric, lactic, glycolic, tartaric, acetic, or malic acid, for producing Ground Activated Cementitious Precursor Material (GACPM) by co-grinding with granulated slag, such as a steel industry waste, Granulated Blast Furnace Slag (GBFS), and the products provided therefrom. The use of the one or more grinding aids reduces the grinding time by about 10-33%, improves particle fineness by about 10-33%, and/or reduces carbon emissions (CO.sub.2) associated with such processes by about 10-33%, thereby significantly enhancing efficiency. Additionally, it improves particle morphology and activates amorphous glass particles in the GACPM (compared to conventional Ground Granulated Blast Furnace Slag (GGBFS), increasing their reactivity with alkali activators in geopolymer cements or with calcium hydroxide when used with Portland cement applications. This activation, due to use of GACPM instead of GGBFS, leads to compressive strength gains of about 5-33% in activated geopolymer cement mortar/grout/concrete and about 5-33% in Portland GACPM cement blends, all while significantly reducing energy usage, costs, and carbon emissions.

An efficient sound-absorbing lightweight aggregate cellular concrete, a method for preparing the same, and an application thereof. The concrete comprises: 85-95 parts by weight of low-carbon sulfur-aluminum-ferric cementitious materials, 5-15 parts by weight of supplementary cementitious material, 0.6-1.5 parts by weight of functional admixture, 20-60 parts by weight of non-sintered lightweight aggregate, 0.35-0.45 parts by weight of water, and 0.5-1.5 L of preformed foam. The non-sintered lightweight aggregate includes cementitious materials, byproduct gypsum, hydrogen peroxide, water, and expanded perlite. A multi-level pore structure is constructed from expanded perlite pores, hydrogen peroxide foaming pores, and physical foaming pores. The material exhibits a noise reduction coefficient 0.80, a bulk density500 kg/m.sup.3, and a flexural strength 1.5 MPa.

An efficient sound-absorbing lightweight aggregate cellular concrete, a method for preparing the same, and an application thereof. The concrete comprises: 85-95 parts by weight of low-carbon sulfur-aluminum-ferric cementitious materials, 5-15 parts by weight of supplementary cementitious material, 0.6-1.5 parts by weight of functional admixture, 20-60 parts by weight of non-sintered lightweight aggregate, 0.35-0.45 parts by weight of water, and 0.5-1.5 L of preformed foam. The non-sintered lightweight aggregate includes cementitious materials, byproduct gypsum, hydrogen peroxide, water, and expanded perlite. A multi-level pore structure is constructed from expanded perlite pores, hydrogen peroxide foaming pores, and physical foaming pores. The material exhibits a noise reduction coefficient 0.80, a bulk density500 kg/m.sup.3, and a flexural strength 1.5 MPa.

Embodiments provide a novel concrete composition and method for forming a geopolymer-based building material. The composition comprises a geopolymer binder, water-retentive aggregates with long-term water retention properties and biological surface growth facilitation, where at least one aggregate is cellulose pre-treated with a saturating coating solution. The composition also includes rigid, porous aeration aggregates and strength aggregates. The method involves mixing these components to form a pourable building material, which is then poured and cured under controlled conditions to create a durable, cured building material. Embodiments include a geopolymer-based construction material comprising an aluminosilicate precursor, an activator, biopolymer-coated water-retentive aggregates, and a porosity agent. Said geopolymer-based construction material retains water above 10% by weight with a pH below 8.0, offering enhanced sustainability, biological compatibility, and durability in construction applications.

A rapidly-expanding and -curing geopolymer formulation includes a liquid aqueous phase with silicate, aluminate and/or silico-aluminate precursors, an inorganic base, a monosaccharide and/or disaccharide, and a water-soluble peroxy compound. The saccharide and peroxy compound react spontaneously and rapidly in strongly alkaline conditions, producing an expanding gas and exothermic heat of reaction that drives at least an initial cure of the geopolymer formulation. The resulting foamed geopolymer formulation can be used in a variety of building and construction applications, as well as and others.

Cement compositions that can capture carbon dioxide and related methods are generally described. These cement compositions can supplement and/or be added to concrete-forming materials to form concrete that can sequester carbon dioxide directly within the concrete.

The invention relates to a process for preparing an alkali activated binder mixture comprising mixing: (i) 50 to 100% by weight of ultramafic rock, based on the weight of the binder mixture, (ii) 0 to 60% by weight of aluminosilicate precursor, based on the weight of the binder mixture, (iii) an alkali activator, wherein the ultramafic rock and aluminosilicate precursor are present in an amount of less than or equal to 95% by weight of the binder mixture, wherein the alkali activator dosage (R) is between 3 and 14, where R is given by the mass ratio: R=Mass of Na2O or K2O in the alkali activator100 Mass of the binder mixture, and wherein the activator modulus (M) is between 0 and 3, where M is a mass ratio given by: M=SiO2 or SiO2 Na2O K2O. The invention further relates to an alkali activated binder mixture, use of the alkali activated binder mixture, a method of making an alkali activated binder slurry, an alkali activated binder slurry obtainable by the method, use of the alkali activated binder slurry, a process for making a concrete structure from the alkali activated binder slurry, and a concrete structure obtainable from the alkali activated binder slurry.

In one embodiment, a geopolymer formulation for a building material comprises sand, ground granulated blast furnace slag (GGBFS), fly ash, sodium tetraborate, boric acid, zeolite, sodium caseinate, and SC-9. Optionally, the formulation also comprises additional constituents like sodium metasilicate, sodium hydroxide, magnesium oxide, hemp, basalt fibers, aggregates, and fillers. Building materials manufactured from the geopolymer formulation have high compressive strength, flexural strength, tensile strength, impact resistance, and thermal resistance.

Method for obtaining a friction material for a brake pad wherein a wet paste formed by mixing an alkaline silicate solution with metakaolin is spread on a support in a layer or tape and subsequently subjected to a thermal treatment to form a geopolymer aggregate; wherein the thermal treatment consists in drying the wet paste to a completely dried or almost completely dried geopolymer aggregate having a moisture content lower than a desired moisture content in the final geopolymer; and wherein the completely dried or almost completely dried geopolymer is ground to a powder, which is then re-wetted to a desired moisture content by addition of water or of a hydrated salt.