Allan Edwards, 2505 S 33rd West Ave, Tulsa, OK 74107, US

GCC Mid-Continent Concrete is a concrete company that offers a full line of in-house quality control testing. The company performs its own testing on raw materials as well as on concrete in the field. Its capabilities include aggregate gradations; specific gravity of aggregates; unit weight of aggregates; organic impurities of fine aggregates; slump of concrete; air content of concrete; compressive strength of concrete; flexural strength of concrete; unit weight and yield of concrete; and trial batch preparation.