Fire Protection of Concrete Upgrading

ADVANTAGES

Concrete Upgrading with Sprayed Coating

Strengthening and upgrading structural systems to improve fire performance of an existing building is a common building renovation activity. For upgrade projects, design engineers must deal with structures in which every element carries a share of the existing load.

The tendency of concrete to spall, or break up, in a fire can lead to loss of the insulating cover to the steel and reduction in overall thickness of the member. In some constructions, supplementary reinforcement is necessary to reduce these effects. The overall thickness and cover is determined by the properties of the aggregate used.

  Fire resistance of concrete upgrading
Cafco FENDOLITE® MII Sprayed Upgrading Of Concrete/Brick Wall From 240 minutes with 180 minute insulation to 240 minutes with equivalent insulation

 

  Fire resistance of concrete upgrading
Cafco MANDOLITE® CP2 Sprayed Upgrading of Pre-stressed or Reinforced Concrete Floor From 30-180 minutes with equivalent insulation (1) to 240 minutes with equivalent insulation (2)

 

  Fire resistance of concrete upgrading
Cafco MANDOLITE® CP2 Sprayed Upgrading of Concrete/Brick Wall From 30 to 60 minutes (3)
From 30 to 90 minutes (3)
From 30 to 120 minutes (3)
From 60 to 90 minutes (3)
From 60 to 120 minutes (3)
From 60 to 180 minutes (3)
From 120 to 180 minutes (3)

NOTE:

  1. Existing fire resistance of concrete floor (30-180 minutes with equivalent insulation) is with referenece to BS 8110: Part 2: 1985.
  2. 240 minute insulation may not be achieved for structural stability of a pre-stressed or reinforced floor that is at risk due to inadequate concrete cover.
  3. Equivalent insulation applies to all existing and upgraded fi re resistance.

Following are some of the factors that should be considered when determining the correct specifications that ensure a concrete floor provides the required fire performance:

  • Concrete density
  • Concrete moisture content
  • Concrete thickness & cover to reinforcing bars
  • Supporting steelwork
  • Other factors
  • Type of fire exposure

Application & Technical Manual

Promat Asia Pacific Handbook