Ditch Lining

Concrete Cloth™ (CC) Geosynthetic Composite Cementitious Mat is favored by engineers and contractors around the world as a quality, long-lasting solution for ditch lining. Concrete Cloth is typically 10 times faster to install than conventional concrete solutions, with installation speeds of up to 200 sqm/hr possible with only a 3 man crew for a longitudinal layup. Often installed in situations where other applications have failed, Concrete Cloth provides a durable, cost effective, and easy to install alternative to conventional concrete solutions.



CC provides a ditch lining solution which is fast, easy and cost effective to install, other key advantages include:

Environmental: CC has a low alkaline reserve, a low washout rate and a low carbon footprint, characteristics that mean it has been approved for use on large projects by the Environment Agency Biodiversity team.

Improved Safety: Less time required on site. Less vehicle movements. Manual handling issues associated with slab lining are eliminated.

Durable: CC has double the wear resistance of standard Ordinary Portland Cement and has passed over 200 cycles of freeze-thaw testing with an estimated minimum design life of 50 years in a wet climate.

Heavy Plant not Required: CC5 and CC8 are available in 60kg and 70kg man-portable rolls.


Ditch Lining

In December 2014, Concrete Cloth GCCM* (CC) was used as a dissipater ditch liner to prevent undermining of the nearby road. Pre-mixed concrete had been used on other parts of the project however this was taking a long time to install; pre-mixed concrete needed exact ground preparation and the re-bar and formwork would have been logistically complex due to the steepness of the slope and tight turns. 125sqm of CC8TM were installed by 6 people in 2 days (working 8 hours a day), with some precipitation and temperatures of 20 - 30 degrees Celsius. The contractor was very impressed with the speed of installation, commenting that on two very similar projects, poured concrete took ten times longer to install.


Ditch Lining

In April 2013, Concrete Cloth (CC) 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.
 


Ditch Lining

In July 2014, Concrete Cloth GCCM* (CC) was used to line a 56m long section of ditch located on a steep embankment next to a road in Canaa Dos Carajas, Para, Brazil. Rainwater was infiltrating and eroding the embankment, risking slip. The installation was conducted as a trial with CC being installed alongside poured concrete. 125sqm of CC8TM were installed in 1 hour by 4 people, which was 8 times faster than the poured concrete solution.







Ditch Lining

Walter Energy, specified CC 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.
 


Ditch Lining

In September 2014, Concrete Cloth GCCM* (CC) was used as a drainage ditch liner at Pogo Mine, Alaska, USA. The ditch prevents surface and storm water coming into contact with the mining tailings field. Due to the location and terrain there are challenges with storm and surface water management. 2 miles of shotcrete lined ditches had been installed in the previous two years. Storm water had undermined the ditch which, with freeze-thaw cycles and heavy rain caused extensive cracking of the shotcrete. CC allowed the installation in weather conditions prevent the use of conventional concrete. Additionally CC will negate the costly maintenance associated with other drainage solutions.


Ditch Lining

In September 2012 Concrete Cloth GCCM*(CC) was specified as a tailings ditch liner in the 4th region of Chile. The ditch was needed to ensure that the flow of tailings was directed to specific areas of a dam, resulting in the uniform and safe deposit of sediment. Over 190,000 tons of tailings would pass through the ditch each day, made up of 60% solids, meaning any material used to line the ditch had to have a high level of abrasion resistance. Both Geoweb and shotcrete had been considered for the project, but would require specialist equipment and labor to install. CC could be installed without any specialist labor, training or equipment, ans is proven to have a high level of abrasion resistance during testing, (DIN 52108).


*Geosynthetic Composite Cementitious Mat

Ditch Lining Advantages

Concrete Cloth stands apart from traditional ditch lining solutions in situations where:

• clients value reduced maintenance costs

• it is not possible to stop or divert water – CC can be installed in a live water course

• speed of installation is key due to time constraints or limiting delay of operations

• there is variance in the ditch profile

• obstacles such as pipes must be accommodated

• site access for concrete plant and machinery is limited

• there is difficult terrain or weather conditions

• remediation is necessary - CC lined ditches are easily dismantled and removed

• steep slopes prevent use of other applications

• there is risk of shotcrete rebound damaging existing infrastructure

• it is necessary to avoid road closures during installation

• there are unusual project dimensions

• there are tight corners or junctions

• there is concern for local ecology and fish

• minimal disturbance is necessary

• vegetation control and weed suppression are desired

• where an organic looking finish is desired – CC will naturally green over time


Concrete Cloth Characteristics

 
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 hydrated. 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.

Hydrocarbon Resistance

CC offers hydrocarbon resistance to BS:14414; based on a 56 day immersion test at 50°C

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.
 


Nuna Innovations Inc.

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