Perguntas frequentes

It is a flexible, concrete filled geotextile that hardens on hydration to form a thin, durable and waterproof concrete layer. Essentially, it can be described as Concrete on a Roll^™ and is used for a wide variety of applications including the rapid lining of drainage channels, providing slope protection, weed suppression, culvert repair and general concrete remediation.

• Sufficient CC to complete the project including allowance for edge fixings and overlaps.
• Suitable lifting equipment to dispense CC Bulk or Wide Rolls.
• Safety mask and gloves.
• Cutting equipment, utility knife or disc cutter.
• Metal or plastic fixing pins.
• Lump hammer.
• Screwdriver and stainless-steel screws or alternative approved method to join the CC layers.
• Water supply.

Please read our CC Equipment List and CC SDS for full details. For ordering, offloading and storage information, refer to our CC Logistics Guide.

• Divert water (if lining an existing watercourse).
• Remove vegetation and grade channel to a uniform profile to suit the design dimensions.
• Remove sharp or protruding rocks >25mm and fill large voids.

If the perimeter edge of the CC is terminating in a soil substrate (i.e. it is not going to be connected to existing infrastructure), excavate crest anchor trenches into the shoulders of the channel. Excavate Leading and Trailing edge anchor trenches on side slopes and along the invert.

Anchor trench dimensions must be a minimum of 150mm x 150mm but may need to be increased to suit the designer’s requirements.

Consult the construction drawings to verify if special substrate preparation measures such as minimum bearing capacity requirements, installation of a non-woven geotextile, or if substrate drainage details are needed.

Unroll CC on the channel profile to suit specified layup, ensuring the fibrous top surface faces upwards, with the PVC membrane in contact with the ground. This is achieved by dispensing the roll by naturally unrolling along the ground rather than pulling material from the top.

Fold back top layer and hydrate the material under the overlapped sections of the CC. Apply a suitable sealant as an 8mm diameter continuous bead along the line of where the screws will be positioned. Fold the top layer back into position and insert stainless steel screws at 50mm centres, 30–50mm from the edge of the top layer so that the screw is inserted through the sealant bead.

Spray the fibre surface multiple times until the CC is fully saturated. The wet CC will first darken and then become lighter as it absorbs the water. Do not spray high pressure water directly onto the CC as this may wash a channel in the material.

To check proper hydration, the CC should feel wet to the touch several minutes after hydration. Press your thumb into the CC and release. If water is present in the depression in the CC, it has been sufficiently hydrated. If no water is observed, then more water must be applied.