Refractory samples cast during the mock-up are cured for a minimum of:

Mock-up installations serve as a qualification tool to verify that the installation procedures, personnel, and equipment can consistently meet quality standards. API 936 stipulates that refractory samples cast during the mock-up must becured for a minimum of 24 hoursbefore demolding or further processing. This curing period ensures full initial set and adequate strength development of the castable.

Failure to meet this curing requirement can result in incomplete hydration, premature cracking, or misleading performance test results. The 24-hour period allows for optimal moisture retention and chemical reaction completion in hydraulic-bonded castables.