Product Data Sheet Show all documents

SikaFibre® M 12 mm

Synthetic fibres for concrete and mortar

Also known as SikaFibre® Monofilament 12 mm, SikaFibre® M 12 mm is based on specially treated polypropylene. They are added to concrete mixes to reduce shrinkage cracking in the plastic stage. SikaFibre® M 12 mm is monafilament for wet batch mixes (> 35 mm slump).

Due to their fineness and special surface treatment, SikaFibre® M 12 mm can be easily dispersed in the concrete or mortar and create a dense matrix that leads to:
  • Improved cohesiveness of the fresh concrete
  • Reduction of shrinkage cracks
  • Increased resistance to impact loads
  • Reduced concrete permeability
  • Resistance to slab curling
  • Improved fire damage properties
Note: SikaFibre® M 12 mm is 18 microns in diameter which is smaller than most other fibres in the market. This fineness gives a greater number of fibres per kg (~180 million per m² of concrete) and a greater effective surface area (225 m² per kg).
Product Data Sheet Show all documents

Usage

SikaFibre® M 12 mm can be used for:
  • Airport apron and car park slabs
  • Concrete and mortar subjected to impact loads
  • Concrete needing high cohesion such as extruded concrete or when laying concrete on a gradient
  • Thin applications of shotcrete or gunite
  • Precast concrete to decrease demoulding time
   

Advantages

Due to their fineness and special surface treatment, SikaFibre® M 12 mm can be easily dispersed in the concrete or mortar and create a dense matrix that leads to:
  • Improved cohesiveness of the fresh concrete
  • Reduction of shrinkage cracks
  • Increased resistance to impact loads
  • Reduced concrete permeability
  • Resistance to slab curling
  • Improved fire damage properties
Note: SikaFibre® M 12 mm is 18 microns in diameter which is smaller than most other fibres in the market. This fineness gives a greater number of fibres per kg (~180 million per m² of concrete) and a greater effective surface area (225 m² per kg).

Packaging

Soluble 600 g bags pre-dosed for 1 m³ of concrete

Colour

White polypropylene fibres with surface agent

Product Details

Product Information

Shelf Life

3 years from the date of production

Storage Conditions

Store properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Protect from direct sunlight.
Technical Information

Tensile Strength

300–400 N/mm²

Application

Application Information

DISPENSING

SikaFibre® M 12 mm can be added directly into the truck mixer. The soluble paper bag will dissolve after a mixing time of 2–6 minutes depending on the quantity of material added. For site mixed screed or plaster with a maximum aggregate of 6 mm, manually add the fibres into the mixer without the bag, as the bag might not fully dissolve due to lack of coarse particles.

To improve the placing of the fresh concrete and its final performance, the use of admixtures such as Plastocrete® or Sikament® is advisable.
Consumption

Recommended Dosage

600 g of SikaFibre® M 12 mm per m³ of concrete (aggregate size greater than 10 mm)

Note: For reduction of explosive spalling higher dosages, typically 1–2 kg per m² will be required.

Documents