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CMA NEWS AND MEMBER ARTICLES

CMA News & Articles - The CMA is the precast concrete industry association of South Africa. Find our members on our website to source quality precast concrete products, professional built environment service(engineers, architects, contractors and more).

Kaytech Introduces Concrete Canvas

Kaytech has signed a distributorship agreement with Concrete Canvas SA to supply geosynthetic cementitious composite mats into the South African civil engineering industry, including road and rail applications.

Concrete Canvas is used specifically for the lining of culverts, channels, slope protection and remediation of existing concrete structures.

Concrete Canvas is a flexible concrete-impregnated fabric that hardens on hydration to form a thin, durable, waterproof and fire-resistant concrete layer. Essentially, it is concrete on a roll. It allows concrete construction without the need for plant or mixing equipment.

The concrete is pre-mixed so there is no need for mixing, measuring or compacting. Just add water.

Concrete Canvas consists of a three-dimensional fibre matrix containing a specially formulated dry concrete mix. A PVC backing on one surface of the mat ensures the material is completely waterproof. The material is hydrated either by spraying or by being fully immersed in water. Once set, the fibres reinforce the concrete, preventing cracking and providing a safe plastic failure mode.

It is available in two thicknesses, CC5 and CC8, which are 5 mm and 8 mm thick respectively.

Concrete Canvas can be laid at a rate of 200 m2/hr – about 10 times faster than conventional concrete solutions. It is available in shorter rolls for applications with limited access. The speed and ease of installation makes it more cost-effective than conventional concrete, with less logistical complexity.

Concrete Canvas is a low-mass, low-carbon technology using up to 95% less material than conventional concrete for many applications.

Key properties include:

  • The PVC backing on one surface of the GCCM ensures that the material has excellent impermeability.
  • The fibre reinforcement prevents cracking, absorbs energy from impacts and provides a stable failure mode.
  • It is twice as abrasion resistant as standard OPC concrete, has excellent chemical resistance, good weathering performance and will not degrade in UV.

Concrete Canvas has good drape characteristics and will closely follow the ground profile and fit around existing infrastructure. While unset it can be cut or tailored using basic hand tools. www.kaytech.co.za



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