Floor Construction : Nominal Steel Fibre Reinforced (Jointed)
Where reasonable soil exists, a nominally reinforced Slab On Grade provides the most cost effective Concrete Flooring Solution. To minimise risk of cracking, Drying Shrinkage is controlled by carefully designed layout and installation of Induced and Formed Joints. Secondary reinforcement is provided by light steel Fabric or 20 or 30 Kg/m3 of Steel Fibres.
When constructing slabs on grade, metal fibres can be used to replace conventional bar or mesh reinforcing. Advantages in the use of fibres in ground supported slab construction include:- Improved crack control due to fibres being present throughout the concrete matrix.
- Improved impact resistance due to presence of fibres near slab surface.
- Elimination of fixing mistakes in reinforcing including ensuring adequate cover.
- Fibres stocked in boxes on pallets require less storage space and are easier to move around than conventional reinforcing and/or mesh.
- Potential program acceleration.
- Potential Labour savings.
Nominal steel fibre reinforced slabs (min 25Kg / m3) are an ideal way of reinforcing a Laser Screed constructed floor slab as it eliminates the need for a reinforcing team placing mesh in front of the concrete placement.
All nominal steel fibre reinforced slabs will have sawn induced joints.
When relatively low dosages of fibres are used to replace mesh the slab on grade must still be sawn into maximum 6m x 6m panels. Joints sawn into the slab collect shrinkage exactly the same as they would on a mesh reinforced slab.
Using CoGri Asia's S-240 Laser Screed, up to 2,000m2 of high quality concrete flooring can be placed and Power Trowelled to a durable Burnished Finish each day. With CoGri Asia emphasis on high standards of Quality Control, Large Pour floor can be constructed to tolerance of TR34 FM2 Special and Abrasion Resistance of BS 8204 AR Special – without the need for liquid hardeners or Dry Shake Toppings.
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