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 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. It is sometimes pigmented to distinguish it from generic materials in an effort to prevent unlawful substitution and to enable verification of the certification listing.

Images

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  Mortar constituents.
• 
  Firestopped cable tray penetration. The cables and the tray are penetrants.
• 
  Cable tray cross barrier firestop test, full scale wall

See also

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

External links