ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,513, issued on July 8.
"Lightweight structural concrete from recycled materials" was invented by Bart Rockett (Marlton, N.J.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of forming a lightweight concrete comprising lightweight aggregates (LWA) made from recycled materials and the resulting composition. The lightweight concrete may be formed by adding calcium sulfoaluminate (CSA) cement and a specialized grout to an amount of water in a mixer, wherein a ratio of the water to the CSA cement is 1 quart to every 10 lbs of CSA cement. The CSA cement, specialized grout, and water may be blended to a smooth consistency. LWA may be added to the bl...