Mortar (firestop)

Firestop mortars are mortars most typically used to firestop large openings in walls and floors required to have a fire-resistance rating. They are passive fire protection items. Firestop mortars differ in formula and properties from most other cementitious substances^{[citation needed]} and cannot be substituted with generic mortars without violating the listing and approval use and compliance.

Construction

Firestop mortar, is a combination of powder mixed with water, forming a cementatious stone which dries hard. It is sometimes mixed with lightweight aggregates, such as perlite or vermiculite^{[citation needed]}. It is sometimes pigmented to distinguish it from generic materials^{[citation needed]} in an effort to prevent unlawful substitution and to enable verification of the certification listing.

Images

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  Mortar constituents.

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  Firestopped cable tray penetration. The cables and the tray are penetrants.

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  Cable tray cross barrier firestop test, full scale wall

See also

• Perlite
• Vermiculite
• Cement
• Fire test
• Certification listing