Outlined here is the proper technique to use in making concrete flexure or beam test specimens using rigid and non-absorptive proprietary forms which are capable of meeting both ASTM and AASHO specifications. One, the form should provide a beam with a length at least 2 inches greater than 3 times the depth of the beam as tested. This minimum cross sectional dimension must be at least 3 times the maximum nominal size of the coarse aggregate used in making the test specimen. Two, the base plate is secured to the mold with built-in studs. The concrete in consolidated in two approximately equal layers by rodding at the rate of one stroke for each 2 square inches of area. Three, a mason's trowel is then used to spade the concrete along the sides and ends of the mold. Voids left by the tamping rods are also filled by tapping the sides of the mold. Four, when consolidation is complete, the concrete is struck off with a straightedge and the surface is finished with a wood or metal float. It is of the utmost importance to make the test specimen speedily and without interruption and to prevent evaporation of water until the specimen is removed from the mold. Until the specimen is demolded, it should be kept continuously moist and at a temperature between 60 and 80 degrees F.