Pressurized curing chambers are available in various sizes and with varying performance capabilites. CTE offers 4, 8, and 16 cube models in varying pressure ranges between 3,000 and 30,000 psi (21 and 206MPa) and typically up to a maximum temperature of 700F (371C). Test cement slurries are prepared according to API/ISO mixing procedure, poured into 2-in. cubic molds, and cured for various time periods at specific temperatures and pressures. The cured cement cubes are removed from the molds and placed in a hydraulic press, where increasing uniaxial load is exerted on each until failure. The compressive strength is then calculated by dividing the load at failure by the cross sectional area of the sample.