Production of low carbon hydraulic cement and concrete

Abstract

Environmentally sustainable hydraulic cement and concrete compositions and methods for producing low carbon footprint hydraulic cement and concrete utilizing high percentages of industrial waste materials, particularly coal fly ash, with minimal or no Portland cement content are disclosed. The hydraulic cement compositions comprise high percentages of fly ash that may include Class C fly ash or blends primarily comprising Class C fly ash combined with activators and catalysts that enable the fly ash to hydrate and develop strength without the need for Portland cement or alkali activators. The resulting cement may exhibit a very low carbon footprint measured by the amount of CO2 per metric ton while achieving performance characteristics comparable to or exceeding those of conventional Portland cement concrete.

Dependencies are inferred from the claim text.