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Anti-Crak fibers are alkali resistant glass fibers, especially developed for the reinforcement of cementitious mortars and concrete mixes. They could be easily introduced into a conventional concrete mix giving millions of dispersed fibers per cubic meter of concrete.

Anti-Crak provides:
  • High modulus of elasticity for effective long term reinforcement.

  • A reinforcing material which does not rust nor corrode.
  • Ideal aspect ratio (i.e. relationship between fiber diameter and length) which makes them excellent for early age performance.
  • A fiber which is safe and easy to handle and does not protrude through the finished surface nor sink.

  • High Tensile Strength – 3-4 times higher than that of steel

  • Inorganic and incombustible.

  • High Dispersion
  • High Performance
  • HD 12mm
  • HP 67/36:

Anti-Crak HD (High Dispersion)

These fibers are designed to be used with normal concrete mixes at very low addition levels – typically 0.6kg/m3 (1lb/yd3) of concrete. Added directly to the mixer or ready mix truck, they disperse instantly within the concrete. The large number of filaments gives a very small distance between fibers whilst the high aspect ratio gives maximum effect in the setting period.

Anti-Crak HP (High Performance)

These fibers are normally used at higher addition levels - usually from 3-10kg/m3 (5-17lb/yd3) of concrete. It is resistant to fiber bundle breakdown in concrete mixing - useful when mixing time and conditions are variable. This physical form enables a higher rate of addition to be achieved without adversely affecting workability. Ideal for improving performance of both in situ and precast concrete.

Anti-Crak HD 12mm

Chopped strands for plastic shrinkage control Description and Application:
Engineered Alkali Resistant glass chopped strand designed for mixing in concrete and all hydraulic mortars. Typically used at low addition level to prevent cracking and improve the performance of concrete, flooring, renders or other special mortar mixes. They incorporate easily into mixes creating a tridimensional homogeneous network of reinforcement in the matrix. It could be added at the central mixing plant to the wet concrete mix or directly into the ready mix truck. They do not protrude through the surface and require no additional finishing procedures. The reinforcement is incorporated in the concrete mass and is invisible on the finished surface.

Advantages and Benefits:
1. Excellent workability
2. High Dispersion : 200 million filaments per KG in fiber length 12 mm
3. Invisible on the finished surface
4. Does not corrode
5. Control and prevention of cracking in fresh concrete
6. Overall enhancement of durability and mechanical properties of concrete
7. Effective at very low dosage
8. Homogeneous mix
9. Safe and easy to handle
How to use: Fibers could be introduced in the ready mix plant or directly in the concrete truck in the last stage, when all the aggregates have been added and mixed. Recommended dosage is 600 g/m3 (1 lb/cu.yd) of concrete to control plastic shrinkage cracking. They are packed in individual 600 g paper bags (water dispersible) or in plastic bags (18 Kg).

Anti-Crak HP 67/36

Macro glass fiber for concrete reinforcement Description and Application: High Performance Alkali Resistant glass macro fiber, engineered to reinforce against plastic, thermal and drying shrinkage cracking. It increases flexural strength and ductility, and adds toughness, impact and fatigue resistance to the concrete. It disperses quickly and evenly throughout the concrete matrix, because the specific gravity is similar to the aggregates used in concrete. This inherent characteristic of glass guarantees high fiber performance throughout the concrete mass. It has been specifically designed to replace welded wire reinforcement, light rebar, steel and synthetic fibers in residential, commercial and industrial slabs-on-ground, compression layers, pavements and precast concrete.

Advantages and Benefits:
1. Alkali resistant glass
2. Control and prevention of cracking in fresh and hard concrete and mortars
3. Improves mechanical properties of hardened concrete
4. Fast and uniform dispersion during blending
5. Does not affect concrete pumpability
6. Allow for high dosages without affecting the workability
7. Will not corrode
8. No additional water demand
9. Easy to handle
How to use:
Could be introduced in the ready mix plant or directly in the concrete truck in the last stage, when all the aggregates have been added and mixed. Chopped strands are packed in 5 Kg plastic bags.

Applications of Anti-Crak:
1. Floor Screeds/Slabs on Ground: Used in various forms, ranging from very thin 10 mm (3/8in) final floor toppings to layers of greater thickness up to   80 mm (3in) which may be used for encapsulating heating elements. The superior impact and crack resistance of fiber reinforced screeds enables   them to be laid more thinly than conventional screeds whilst giving better performance.
2. Ready Mix Concrete: For control of early plastic shrinkage cracking and general improvement of concrete, at any addition rate as low as 0.6kg/m3   (1lb/yd3) and is added to normal concrete mixes without any change in formulation. At higher levels of up to 10kg/m3 (17lb/yd3) the hardened, long   term properties of the concrete are usefully improved.
3. Precast Concrete: Small additions could be used in precast concrete components (cladding panels or civil engineering elements) to effect useful improvements. The addition of only 2-4 kg/m3 (4-7lb/yd3) of Anti-Crak® in concrete, could give benefits of avoidance of cracking, elimination of edge or demoulding damage, and an improvement in surface finish and appearance. At higher addition rates, for example 18kg/m3 (30lb/yd3) of concrete, it could be the sole reinforcement, without the need for conventional steel mesh, in small precast items such as channels and boxes.
4. Renders/Stucco: Anti-Crak fiber, with an addition rate of 0.05% of HD up to 1.5% of HP contributes to a highly successful render/stucco system. Applied by either spraying or trowelling to a thickness of 4-10 mm (1/8-3/8in), the finished render has superior resistance to impact and shrinkage cracking and is less permeable to water than normal sand cement render. Fiber reinforced render/stucco is also used in dry blockwall construction and external insulation systems.
5. Gunite/Shotcrete : Anti-Crak fiber at up to 1% by weight of total mix could be added to normal sprayed concrete mixes, giving a crack resistant and impact resistant lining from a relatively thin layer compared with normal sprayed concrete. Both dry guniting and wet sprayed concrete process can utilize Anti-Crak® fiber reinforcement. Major benefits of Anti-Crak® glass fiber compared with other fiber types are reduced rebound and wastage, and a non-hazardous surface which does not need a final protective coat.