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Rupture Refractories Test Grip Crush Modulus

Rupture Refractories Test Grip Crush Modulus

ASTM C133

ASTM C133 Rupture Refractories Test Grip Crush Modulus determines the cold crushing strength and the modulus of rupture (MOR) of dried or fired refractory shapes of all types. This test method determines room temperature flexural strength in 3-point bending for cold modulus of rupture and compressive strength for cold crushing strength. This method is useful in research, design, manufacturing, and developing purchasing specifications

The relative ratio of the largest grain size to the smallest specimen dimension may significantly affect the numerical results. For example, smaller cut specimens containing large grains may present different results than the bricks from which they were cut. Under no circumstances should 6 by 1 by 1-in. (152 by 25 by 25-mm) specimens be prepared and tested for materials containing grains with a maximum grain dimension exceeding 0.25 in. (6.4 mm).


General introduction

ASTM C133 Rupture Refractories Test Grip Crush Modulus determines the cold crushing strength and the modulus of rupture (MOR) of dried or fired refractory shapes of all types. This test method determines room temperature flexural strength in 3-point bending for cold modulus of rupture and compressive strength for cold crushing strength. This method is useful in research, design, manufacturing, and developing purchasing specifications


The relative ratio of the largest grain size to the smallest specimen dimension may significantly affect the numerical results. For example, smaller cut specimens containing large grains may present different results than the bricks from which they were cut. Under no circumstances should 6 by 1 by 1-in. (152 by 25 by 25-mm) specimens be prepared and tested for materials containing grains with a maximum grain dimension exceeding 0.25 in. (6.4 mm).


Test MethodSections in ASTM C133
Cold Crushing Strength4 to 9
Modulus of Rupture10 to 15


Rupture Refractories Test Grip Crush Modulus



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