Patent ID: 7972432

Claim:
A pozzolan cement composition comprising: a hydraulic cement fraction comprised of a distribution of differently sized hydraulic cement particles at least partially comprised of tricalcium silicate and/or dicalcium silicate that provide excess calcium hydroxide, when mixed with water, that is available for reaction with a pozzolan, the hydraulic cement fraction having a Blaine fineness greater than about 500 m 2 /kg; and a pozzolan fraction comprised of a distribution of differently sized pozzolan particles that react with calcium hydroxide in the presence of water, including calcium hydroxide provided by the hydraulic cement particles when mixed with water, in order to form solid hydration products having cementitious properties, the pozzolan fraction having a Blaine fineness that is less than the Blaine fineness of the hydraulic cement fraction, wherein a majority of the combined hydraulic cement and pozzolan particles above 20 μm are pozzolan particles and a majority of the combined hydraulic cement and pozzolan particles below 20 μm are hydraulic cement particles.