Ferrocement, GRP & GRC Sewer Relining and Culvert Repairs—Ferro Monk Systems Limited
Insitu Lining
Ferro Monk Systems Limited has been undertaking specialist sewer repairs for over 25 years. According to the specification and location of the pipework, its size, and our clients’ needs, we are able to offer man entry renovation, in which our trained team work in the pipeline to complete specialist repairs.
The man entry method can sometimes be more cost effective than working on the pipe remotely.
We use Water Research Council approved techniques, a fully trained and experienced directly employed workforce, and work in accordance with an audited Quality Assured management system to ISO 9001 standard.
With a range of systems at our disposal, we are able to offer the most appropriate solutions for your sewer or drainage problem.
Ferrocement Lining
Ferrocement is a form of reinforced concrete.
The Ferro Monk™ Ferrocement lining system is ideally suited to the repair and renovation of sewers, tunnels and culverts that are suitable for man-entry. They are a Type I structural liner as defined by the Sewer Rehabilitation Manual.
Fully approved by the Water Research Council (WRc), following extensive trials and testing in the early 1980s, we have renovated hundreds of kilometers of underground structures using this versatile technique.
The Ferro Monk™ linings consist of a thin shell of reinforced concrete which provides a high cement content, low water/cement ratio, high density product with superior mechanical properties.
Unlike rigid preformed systems, the Ferrocement lining is an insitu method, and is more able to take up the shape of the original structure. It is particularly useful on meandering pipelines, or sections which contain a range of internal dimensions.
One of the key benefits of this method is that there is little loss in the cross sectional of the pipe following the repair, when compared to non-insitu methods. Repairing sections in this way can also help to improve the flow characteristic of the pipe.
The system is most commonly employed using a two part method.
A precast invert is manufactured in our Yorkshire factory and is grouted into position in the pipe. This is usually able to take normal dry weather flows, often mitigating the need for an overpumping installation above ground.
The rest of the structure (sides and soffit) is completed insitu, using galvanised mesh reinforcement and sprayed mortar which is trowelled insitu and given a brush finish.
Ferrocement lining is a Type I system as defined by the Sewerage Rehabilitation Manual and is covered under Water Industry Specification No. WIS 04-12-06.
Epoxy Lining
Ferro Monk is delighted to be the first approved partner in the UK to commercially use Ultracoat, a 100% epoxy lining system.
Key benefits of Ultracoat
Sprayable onto damp substrates - reacts and bonds well to damp surfaces.
Speed: assets can be brought into use in around two hours from application.
Chemical resistance - tolerant to high levels of sulphur dioxide, acids and
Alkalis.
High bond strength on many backgrounds including concrete, steel, brick,
fibreglass and asbestos.
Improves structural integrity - strengthens corroded / weakened structures
such as tanks, chambers, manholes and culverts.
Environmentally friendly - 100% epoxy with no volatile organic compounds.
High safety values - can be applied in confined spaces, no combustion or
hazardous material risks.
Resistant to algae and bacterial growth.
Exceptional versatility - sprayed insitu, it will take the shape of the substrate.
Strong track record - in use for almost twenty years, with over 45,000
manhole chambers rehabilitated to date.
Admirable credentials - the only coating approved by the US Navy for potable
water, fuel oil and sewerage applications.
Click here to look at and download a case study.
Glass Reinforced Plastic (GRP)
This is another example of a Type 1 liner. Consisting of Pre formed panels in either one piece or segmental sections, these are fixed together within the host structure.
The gap – or annulus - between the new lining and the existing structure is grouted. Under certain circumstances, the loss of cross sectional area can be compensated by increased flow characteristics. Water Industry Specification No. WIS 04-34-02 covers this type of lining.
Glass Reinforced Cement (GRC)
Similar to GRP in the basic concept of installation, these are a further example of a Type 1 liner but using panels made from cement, fine aggregates and glass fibres and accordingly have slightly different characteristics. They are referred to in Water Industry Specification No. WIS 04-12-04.
