Concrete Cloth

Milliken

Flexible, cement impregnated fabric that hardens when hydrated to form a thin, durable, water and fire proof concrete layer. Concrete Cloth™ (CC) Geosynthetic Cementitious Composite Mat (GCCM) allows construction without the need for plant or mixing equipment. Simply position the cloth and add water - workable for 2 hours and hardens to 80% strength within 24 hours. Concrete Cloth Geosynthetic Cementitious Composite Mat (GCCM) is often used as an alternative to sprayed concrete or shotcrete due to its speed and ease of installation, material and costs savings, and long service life.

Slope Protection Concrete Canvas Shelter Interior


Concrete Cloth Geosynthetic Cementitious Composite Mat (GCCM) Applications

Concrete Cloth Geosynthetic Cementitious Composite Mat (GCCM) is an incredibly versatile medium which has endless applications. We are seeing it used in Oil & Gas, Mining, Utilities, Agriculture, Municipal, Road & Highways, Defense, Design, and Rail. Concrete Cloth Geosynthetic Cementitious Composite Mat (GCCM) is frequently specified for the following applications :



Why not Shotcrete or Sprayed concrete?

Well, the reasons are many. We have prepared an in-depth report reviewing some of the issues and failures of Shotcrete or Sprayed Concrete which you can view below. First, here is a summary of the points that we cover in our report:


  • project cost
  • requires specialist labor
  • requires special equipment
  • rebound
  • hidden costs
  • dependent on weather
  • unpredictable performance
  • higher maintenance costs
  • limited site access
  • risk of damage
  • safety issues
  • longer installation time
  • damaged by freeze-thaw cycles
  • environmental issues
  • difficult to waterproof
  • road closures

  • If you are considering using Shotcrete or Sprayed concrete for a job, ask us for a cost comparison and job timeline estimate to see why so many people are choosing Concrete Cloth for their projects!



    Case Studies

    Ditch Lining

    In December 2014, Concrete Cloth (CC) GCCM was used to protect a slope that was suffering from weathering erosion, leading to rockfall onto the road. CC was installed, with shotcrete being installed simultaneously on a different part of the slope, to see which was the better method. The CC was over twice as fast to install as the shotcrete alternative, taking just 5 days instead of the shotcrete’s 12, and also resulted in cost savings. Additionally, the shotcrete required the entire road to be closed for the duration of the works, whereas with CC the road remained open. Furthermore the shotcrete is already showing signs of failure with noticeable cracking occurring.    


    Ditch Lining

    In April 2013, Concrete Cloth (CC) GCCM was specified on behalf of Network Rail (NR) to reline a 220m length ditch running next to a busy rail line in Skewen, South Wales. The original ditch liner was a corrugated steel pipe that had deteriorated and vegetation growth through missing sections was limiting flow capacity. The pipe had come away from the ditch profile in sections and the integrity of the channel and banks were being compromised. The speed of install was critical, as work required lane closure and traffic management measures for an adjacent residential area. Using CC, the project was completed significantly quicker than would be possible with poured or precast concrete.  


    Culvert Lining

    In November 2014, Concrete Cloth™ (CC) GCCM was used to reline a steel corrugated culvert pipe. The existing pipe had broken down through flow erosion and weathering. Water was flowing through the bottom of the culvert and was compromising the base soils below which threatened the integrity of the road above that carries heavy loads from logging activities. A road closure would be required to replace the culvert and was not an option at this time. Concrete Cloth was a much more cost effective solution for this problem and was chosen due to its speed of installation, its ability to easily accommodate changes in culvert profile and its minimal environmental impact.


    Ditch Lining

    Walter Energy, specified Concrete CLoth GCCM as a protective carrier ditch liner, directing mining industrial waste water from Willow Creek mine to a nearby settling pond. The lined ditch had to be as water proof as possible, handle freeze/thaw conditions, and be easy to repair. The carrier ditch was 10.5-12 meters wide, between 3 and 5 meters deep and approximately 650 metres long. The overall size, performance requirements of this particular application, as well as the cost potential meant that Ledcor were reluctant to use Shotcrete. The contractors completed the work on schedule in under six weeks, installing over 10,000sqm of CC in a remote site and in difficult weather conditions.  




    Concrete Cloth Characteristics

     

    What is it?

    Concrete Cloth is a flexible cement impregnated fabric that hardens on hydration to form a thin, durable water proof and fire proof concrete layer.

    Essentially, it's concrete on a roll Just Add Water.

    Easy To Use

    Concrete Cloth is available in man portable rolls for applications with limited access or where heavy plant equipment is not available.

    There is no need for mixing or measuring, the concrete is premixed and cannot be over hydratred. It will set in fresh and sea water.

    Rapid

    Once hydrated, Concrete Cloth remains workable for 2 hours and hardens to 80% strength within 24 hours.

    Accelerated or retarded formulations can be produced to meet specific customer requirements.

    Flexible

    Concrete Cloth has good drape characteristics, allowing it to take up the shape of complex surfaces including those with a double curvature.

    Unset Concrete Cloth can be cut or tailored using basic hand tools.

    Strong

    The fibre reinforcement prevents cracking, absorbs energy from impacts and provides a stable failure mode.

    Durable

    Concrete Cloth is chemically resistant, has good weathering performance and will not degrade in UV.

    Water Proof

    The PVC backing on one surface ensures that the material is completely water proof and chemically resistant.

    Fire Proof

    Concrete Cloth is a ceramic and will not burn.

    CO2 Savings

    Concrete Cloth is the only way of laying a thin concrete layer from a prefabricated roll of material.

    This enables up to 150 mm of poured concrete to be replaced with just 8 mm for many surfacing applications.

    As a result, material savings of 95% can be achieved for a typical construction project.

    This directly reduces the CO2 footprint of construction work not only through material savings but also through reduced road transport and time on-site.

    Low Wash Out

    Concrete Cloth traps dry concrete powder in a 3-dimensional fibre matrix. Testing based on BS8443 to indicate the effect of underwater setting, shows that Concrete Cloth loses only 3% by mass.

    By comparison, specialized underwater concretes typically lose between 10-15% while also requiring much larger volumes to be poured.

    Alkalinity

    Concrete Cloth uses a specialized high early strength concrete with a limited alkaline reserve. Unlike most concretes, it is not classified as an irritant and is less damaging to the environment.

    Environment Agency Approval (UK)

    Concrete Cloth was approved for use by the Environment Agency (EA) Biodiversity team in 2010 for the Church Village Bypass Project.

    Benefits cited included ‘surface roughness to provide diversity in the channel's morphology’ and its ability to introduce ‘sinuosity in the channel line’.

    Several projects have since been granted approval on a case-by-case basis and the EA recently purchased Concrete Cloth directly for internal use as a weed inhibitor.

    Greening

    Untreated Concrete Cloth will naturally ‘green’ over time as the textured top surface allows moss growth, whilst the fibre-reinforced concrete layer will prevent root-growing vegetation, which would otherwise restrict water flow and increase maintenance costs.


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    Side Slope Protection Installation

    Nuna Innovations Inc.

    Toll Free: 1.855.815.4385
    Telephone: 1.604.815.4385
    Fax: 1.604.815.0098
    Email: sales@nunainnovations.com