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This document specifies a method for the determination of the modulus of rupture of refractory products at elevated temperatures, under conditions of a constant rate of increase of stress. A method for determination of the same property at ambient temperature is given in ISO 5014. The method relates primarily to shaped and fired refractories.
Shaped refractories are those which have fixed geometry and dimensions when delivered to the user. This document is accordingly applicable to standard shape refractory bricks, but also special shapes refractory products and pre-cast products.
If it is to be applied to chemically bonded or tar-bonded bricks, they will usually require some form of preliminary heat treatment and/or defined and controlled atmosphere. This preliminary treatment and the atmosphere shall be as agreed between the interested parties and shall be stated in the test report.
This document is also applicable to unshaped refractories (see ISO 1927-6) after preparation of test specimens according to ISO 1927-5.
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