Ash Grove family of companies, including Ash Grove Cement Company, Ash Grove South Texas, LLC, Sapphire Americas LLC, Oldcastle Cement Holdings, Houston Cement Company, and Suwanee American Cement Company, is one of North America's leading cement manufacturers, with a legacy of innovation and excellence dating back to 1882. Familiar with terminal processing equipment such as ship unloaders, belt conveyors, bucket elevators, air slides and gates, truck loading equipment, silos, and domes.