Patent 7351756 was granted and assigned to Terrasimco Incorporated on April, 2008 by the United States Patent and Trademark Office.
A composite material is disclosed having a matrix formed of polyethylene terephthalate and cement particles distributed in the matrix. The cement particles may be Portland cement. About 50 wt % or less of the composite material is cement particles. The cement particles have an average particle size of no more than about 100 μm.