Method for producing a supplementary cementitious material from concrete waste and similar materials, supplementary cementitious material obtainable by the method, use of the supplementary cementitious material for making hydraulic building materials and alkali activated binders, method for manufacturing alkali activated binders, composite binders and alkali activated binders comprising the supplementary cementitious material, and use of the composite binder for making hydraulic building materials.

The present disclosure concerns an aluminosilicate having a Blaine fineness of about 500 m.sup.2/kg to about 3000 m.sup.2/kg and/or a specific surface area of about 4 m.sup.2/g to about 20 m.sup.2/g, as well as the uses thereof. The present disclosure also comprises a dry cementing composition and a mortar or concrete composition, the compositions comprising said aluminosilicate. The present disclosure also comprises a process for the manufacture of aluminosilicate. The process comprises: roasting a spodumene concentrate in an acid medium; leaching the acidic roast spodumene concentrate so as to obtain a mixture comprising a solid comprising the aluminosilicate and a leachate; and separating the aluminosilicate from the leachate in an acid medium, wherein said aluminosilicate contains a calcium concentration of less than about 5%.

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.

A hybrid additive for use in construction materials such as asphalt and concrete. The additive includes a plastic or polymer material, and one or more of fibers, pozzolans, nano-carbon tubes, glass, recycled asphalt shingles (RAS), liquid anti-strip, hydrated lime, rejuvenators, cementitious material, and ground tire rubber. Also disclosed are hybrid composite materials useful as paving and building materials, and methods of making the same. The hybrid additives were found to improve the performance of the asphalt and concrete mixtures by increasing bonding and strength within the mixture, thereby lowering the costs and increasing the performance and useable life of structures formed using the mixtures.

A hybrid additive for use in construction materials such as asphalt and concrete. The additive includes a plastic or polymer material, and one or more of fibers, pozzolans, nano-carbon tubes, glass, recycled asphalt shingles (RAS), liquid anti-strip, hydrated lime, rejuvenators, cementitious material, and ground tire rubber. Also disclosed are hybrid composite materials useful as paving and building materials, and methods of making the same. The hybrid additives were found to improve the performance of the asphalt and concrete mixtures by increasing bonding and strength within the mixture, thereby lowering the costs and increasing the performance and useable life of structures formed using the mixtures.

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.

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.

Provided herein are compositions, methods, and systems related to 3D printing a reactive vaterite cement composition, comprising feeding a composition comprising reactive vaterite cement through a 3D printing machine; printing a 3D printed reactive vaterite cement product; and curing the 3D printed reactive vaterite cement product by transforming reactive vaterite cement in the 3D printed reactive vaterite cement product to aragonite and/or calcite during and/or after the curing.

Provided herein are compositions, methods, and systems related to 3D printing a reactive vaterite cement composition, comprising feeding a composition comprising reactive vaterite cement through a 3D printing machine; printing a 3D printed reactive vaterite cement product; and curing the 3D printed reactive vaterite cement product by transforming reactive vaterite cement in the 3D printed reactive vaterite cement product to aragonite and/or calcite during and/or after the curing.

A reinforced composite product of concrete (14) reinforced by reinforcement mesh(s) (13, 13) of an aluminium alloy. where calcium hydroxide of the concrete is absent to avoid or reduce corrosion of the aluminium reinforcement by replacing cement with >35% active pozzolana and that the mesh can be made by slit-stretching or by punching a sheet aluminium metal. The aluminium mesh is advantageous for use as reinforcement in various concrete structures in corrosive environment and where traditional steel meshes are used today.