Room temperature compressive strength of refractory materials

Compressive strength refers to the maximum pressure unit of material under normal temperature area can bear, N/mm2 MPa (MPa) said. Room temperature compressive strengthof refractory materials is an important technical property of materials. Although in general the thermo technical equipment Institute of refractories under static load is small, generally not more than 0.1~0.2 N/mm2, top brick is not more than 0.4~0.5 N/mm2, large blast furnace, hot air furnace, open hearth brick regenerator checker brick layer, the maximum load is less than 1 N/mm2. In addition to the improper transport and masonry, make the material by the impact and extrusion and may be damaged, rarely for room temperature compressive strength is low and the destruction of materials. In the current standards are specified compressive strength of refractory products at room temperature not lower than that of 10~15 N/mm2, for advanced refractory product requirements in the 25~30 above N/mm2, is mainly because the cold crushing strength ofrefractory products are the parameters of its organizational structure, especially the sensitive parameters of microstructure. While the material micro structure formation is restricted by material preparation process of various factors, such as raw material characteristics and mixture ratio, particle size and gradation, inter particle binding, molding process and sintering condition, have important effects on Micro structure of materials. Therefore, compressive strength at room temperature is a reliable method for testing the current process status. In addition, through the room temperature compressive strength of materials can be evaluated indirectly the merits of other mechanical properties, such as 2~3 times the normal temperature compressive strength generally refractories is about bending strength is 5~10 times; tensile strength; good wear resistance and impact resistance of all has high tensile strength at room temperature corresponding. Moreover, method for determination of compressive strength at room temperature is simple. Therefore, compressive strength is the routine test and judge the quality of products.