Strength formation of clay‑bonded sand mixtures

This paper examines various factors influencing the strength development of clay‑bonded sand mixtures. The strength of the mixture depends on the granulometric composition of the refractory base, moisture content, and the quality of the clay. It is emphasized that compressive and tensile strength reflect different aspects of mixture behavior and should not be treated as equivalent. The compressive strength of green specimens indicates the ability of the refractory filler – water– binder system to compact, while tensile strength characterizes the quality of the binder. The strength in the moisture condensation zone reflects the mixture’s ability to produce clean casting surfaces.