Method for making a concrete block

A method for making metal fiber reinforced concrete block having a pair of opposite parallel surfaces in which the deviation from parallel throughout the spacing of the surfaces is not greater than plus or minus 0.032 inches and when installed in a crib configuration the crib develops 3,000 PSI compressive strength comprising:

• a. providing a mold having two parallel, aligned, spaced apart inner face walls wherein the deviation from the parallel alignment of the inner face walls of the mold is not greater than plus or minus 0.032 inches;
• b. providing a mix as follows:
• (1) commencing with aggregates;
• (2) adding metal fibers to the aggregates and mixing them with the aggregates;
• and
• (3) then adding cement to the aggregates and metal fibers;
• c. adding water to the mix and forming a mixture;
• d. filling a mold with the mixture and compacting it in the mold to form the concrete block;
• and
• e. advancing a stripper means through the mold wherein the stripper means frictionally engages the inner surfaces of the two parallel walls and removes the concrete block from the mold.