Compressive strength is the ultimate load that refractories can withstand per unit area at a certain temperature without being destroyed. The compressive strength of refractory materials is divided into normal temperature compressive strength and high temperature compressive strength. The normal temperature compressive strength refers to the limit load that the product can withstand at room temperature; High temperature compressive strength refers to the limit load that the product can withstand under the specified high temperature conditions.

The normal temperature compressive strength can indicate the sintering condition of the material and the properties related to its structure. In addition, other properties such as wear resistance and impact resistance can be judged by the normal temperature compressive strength.

The normal temperature compressive strength of the refractory is related to the material itself, but the production process also has a great impact on it, and the high normal temperature compressive strength indicates that the raw pressing quality of the material and the sintering condition of the brick body is good. The pressure strength at room temperature is related to its bulk density and apparent porosity, and the higher the bulk density and the lower the porosity, the higher the pressure strength at room temperature should be. Therefore, the production process that can improve the bulk density of the material is also beneficial to improve the pressure strength at room temperature, such as the use of well-sintered and dense raw materials, reasonable particle grading, high pressure molding, high temperature firing and appropriate extension of the holding time.

The value of high temperature compressive strength can reflect the change of the binding state of the material at high temperature. Karide Kiln believes that especially for amorphous refractory materials, due to the addition of a certain number of bonding agents, the temperature increases and the binding state changes, and it is necessary to measure its high temperature compressive strength.

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