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.