Patent · US Active

High early strength pozzolan cement blends

US7799128B2 · kind B2 · utility

28Cited by

22References

21Claims

0Family size

Assignee

ROMAN CEMENT, LLC · US

Inventors

John M. Guynn · Salt Lake City, US
Andrew S. Hansen · Bountiful, US

Key dates

Filing date	Oct 8, 2009
Grant date	Sep 21, 2010
Priority date	—
Expiry date	Oct 8, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S106/01
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A high early strength pozzolan cement includes larger sized pozzolan particles and smaller sized hydraulic cement particles which contain tricalcium silicate (e.g., Portland cement). Particles larger than 10 μm are predominantly (50%, 65%, 75%, 85% or 95%) pozzolan particles, and particles smaller than 10 μm are predominantly (50%, 65%, 75%, 85% or 95%) hydraulic cement particles. Excess calcium from the hydraulic cement forms calcium hydroxide available for reaction with the pozzolan particles, optionally in combination with supplemental lime. At least 30%, 40%, 45%, 55%, 65% or 75% of the pozzolan cement (combined pozzolan and hydraulic cement particles) consists of pozzolan, and less than 70%, 60%, 55%, 45%, 35% or 25% consists of hydraulic cement.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.