An aluminosilicate having a pozzolanic activity of greater than about 1400 mg Ca(OH).sub.2 per gram of aluminosilicate. An aluminosilicate having a pozzolanic activity of less than about 1400 mg Ca(OH).sub.2 per gram of aluminosilicate and a d.sub.50 of 200 μm or less. Binder compositions, clinker compositions and concrete compositions comprising said aluminosilicates. A method of making said aluminosilicates. A clinker composition comprising a first aluminosilicate (e.g. kaolin) and a use of said clinker composition to make a composition comprising said aluminosilicates.

An aluminosilicate having a pozzolanic activity of greater than about 1400 mg Ca(OH).sub.2 per gram of aluminosilicate. An aluminosilicate having a pozzolanic activity of less than about 1400 mg Ca(OH).sub.2 per gram of aluminosilicate and a d.sub.50 of 200 μm or less. Binder compositions, clinker compositions and concrete compositions comprising said aluminosilicates. A method of making said aluminosilicates. A clinker composition comprising a first aluminosilicate (e.g. kaolin) and a use of said clinker composition to make a composition comprising said aluminosilicates.

An aluminosilicate having a pozzolanic activity of greater than about 1400 mg Ca(OH).sub.2 per gram of aluminosilicate. An aluminosilicate having a pozzolanic activity of less than about 1400 mg Ca(OH).sub.2 per gram of aluminosilicate and a d.sub.50 of 200 μm or less. Binder compositions, clinker compositions and concrete compositions comprising said aluminosilicates. A method of making said aluminosilicates. A clinker composition comprising a first aluminosilicate (e.g. kaolin) and a use of said clinker composition to make a composition comprising said aluminosilicates.

A method for producing a supplementary cementitious material (SCM) that includes providing a starting material containing dolomite and aluminium silicate, converting the starting material to the supplementary cementitious material by burning in the temperature range of >800 to 1100° C. or by burning in the temperature range of 725 to 950° C. in the presence of a mineralizer and cooling the supplementary cementitious material.

A method for producing a supplementary cementitious material (SCM) that includes providing a starting material containing dolomite and aluminium silicate, converting the starting material to the supplementary cementitious material by burning in the temperature range of >800 to 1100° C. or by burning in the temperature range of 725 to 950° C. in the presence of a mineralizer and cooling the supplementary cementitious material.

A method of expanding expandable polymeric microspheres including contacting an aqueous slurry including unexpanded, expandable polymeric microspheres with heat in-situ during manufacture of cement. A method of manufacturing cement includes: (i) contacting an aqueous slurry of unexpanded, expandable polymeric microspheres with heat proximate to and/or during said manufacturing of cement to create expanded polymeric microspheres; (ii) optionally pre-wetting the expanded polymeric microspheres; and (iii) mixing the expanded polymeric microspheres with cement.

A method of expanding expandable polymeric microspheres including contacting an aqueous slurry including unexpanded, expandable polymeric microspheres with heat in-situ during manufacture of cement. A method of manufacturing cement includes: (i) contacting an aqueous slurry of unexpanded, expandable polymeric microspheres with heat proximate to and/or during said manufacturing of cement to create expanded polymeric microspheres; (ii) optionally pre-wetting the expanded polymeric microspheres; and (iii) mixing the expanded polymeric microspheres with cement.

The invention generally relates to a method of making a plastic aggregate, and its use to make concrete products. The aggregate is formed by providing a granulated waste plastic material, introducing the granulated waste plastic material into an extruder having a die, the die having a ratio of die nozzle open area to die land area of about 1:10 to about 1:40, and extruding the granulated waste plastic material through the extruder to generate an extruded plastic aggregate. The method can include the presence of controlled cooling, the addition of additives and treatment of the surface of the aggregate to produce a desired aggregate that can be used to make a concrete product with desired properties, such as compressive strength and weight.

The invention generally relates to a method of making a plastic aggregate, and its use to make concrete products. The aggregate is formed by providing a granulated waste plastic material, introducing the granulated waste plastic material into an extruder having a die, the die having a ratio of die nozzle open area to die land area of about 1:10 to about 1:40, and extruding the granulated waste plastic material through the extruder to generate an extruded plastic aggregate. The method can include the presence of controlled cooling, the addition of additives and treatment of the surface of the aggregate to produce a desired aggregate that can be used to make a concrete product with desired properties, such as compressive strength and weight.

Described are cementitious reagent materials produced from globally abundant inorganic feedstocks. Also described are methods for the manufacture of such cementitious reagent materials and forming the reagent materials as microspheroidal glassy particles. Also described are apparatuses, systems and methods for the thermochemical production of glassy cementitious reagents with spheroidal morphology. The apparatuses, systems and methods makes use of an in-flight melting/quenching technology such that solid particles are flown in suspension, melted in suspension, and then quenched in suspension. The cementitious reagents can be used in concrete to substantially reduce the CO.sub.2 emission associated with cement production.