.11.2 The test bars shall be cast in dried, baked, or chemically bonded molds made mainly of an aggregate of siliceous
sand with appropriate binders. The average grain size of the sand shall approximate that of the sand in which the castings
are poured. Molds for the test bars shall be approximately at room temperature when poured. More than one test bar may be cast in a single mold, but each bar in the mold shall be surrounded by a thickness of sand which is not less than the
diameter of the bar. A suitable design for a mold is shown in Fig. 2