Concrete and Masonry Upgrading using Sprays

ADVANTAGES

  • Promat sprays are compliant to the requirements of AS3600 Clause 5.8.1.2 as a product that can be used to upgrade the fire rating period of a concrete wall or slab
  • Approvals for upgrading masonry walls
  • Quick and easy spray application
  • Thinner and lighter than adding extra concrete

Concrete and Masonry Upgrading using Sprays

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, the depth of the steel reinforcement and fire rating level required. For tunnel applications please go to www.promat.com.au/tunnels

Cafco FENDOLITE® MII, Cafco MANDOLITE® CP2 and CAFCO® 300 – Can be used to upgrade a concrete wall or slab from a rating of 30 minutes to up to 240 minutes provided concrete thickness and depth to reinforcement can be provided. Thickness will depend on a number of factors.

  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)

Cafco MANDOLITE®CP2 Thicknesses for Fire Upgrade of Masonry Walls

Existing Wall FRL New Wall FRL Thickness of CP2 on each face (mm)
30/30/30
30/30/30
30/30/30
60/60/60
60/60/60
60/60/60
60/60/60
120/120/120
60/60/60
90/90/90
120/120/120
90/90/90
120/120/120
180/180/180
240/240/240
180/180/180
25
45
55
25
45
60
80
45

For non-loadbearing walls, or loadbearing walls complying with the slenderness ratios of AS 3700, the thicknesses given in Table 2 may be applied on one face only or divided equally between each face, otherwise the thickness of Mandolite CP2 must be applied to each face.

If the fire exposed face can be identified then the appropriate thickness of Mandolite CP2, as given in Table 2, need only be applied to that face.

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

Product Datasheet

Product Datasheet

Application & Technical Manual