US Patent Issued on July 21 for "Heat and fire resistant geopolymer materials" (North Carolina Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,637, issued on July 21.

"Heat and fire resistant geopolymer materials" was invented by Jessica Cui (Charlotte, N.C.), Futong Cui (Charlotte, N.C.) and Zhimin Yu (Charlotte, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A light weight geopolymer concrete, having a specific gravity less than 2.0, more typically between 1 and 1.3, is provided that has compressive strength comparable to or greater than ordinary Portland concrete. The light weight geopolymer concrete has low shrinkage, expansion, and cracking, and substantially no loss of compressive strength when exposed to high temperatures of 800deg C. or greater, as would occur in a fire. To be...