Which type of failure describes a separation within SFRM?

Cohesive failure refers to a type of failure that occurs when there is a separation within the material itself, rather than at the interface between two materials. In the context of Spray-applied Fire-Resistive Material (SFRM), this means that the failure happens within the SFRM layer, where the internal bonds within the material break down. This can lead to a loss of structural integrity and the effectiveness of the fireproofing system.

Understanding cohesive failure is essential in assessing the performance and durability of fireproofing materials like SFRM. Factors such as the quality of the mixing, application techniques, and the curing process can influence the likelihood of cohesive failures. Recognizing this type of failure helps in diagnosing issues in fireproofing applications and implementing corrective measures to ensure safety and compliance with building codes.