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Problem |
Solution |
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(1) Abrasion
of scraper blades and wheels in sediment tanks results
in continuous wearing away of the concrete surface.
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Cracked or spalled concrete can be repaired with Fastfill.
Monolevel 844SP is then spray or trowel applied
to rough surfaces to give a smooth, engineering finish
with excellent abrasion resistance and durability.
Further protection can be provide by overcoating with
Flexcrete’s epoxy and cement modified polymer coatings,
Cemprotec E942 and Cemprotec E-Floor.
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(2) Chemical
attack from raw sewage breaks down the matrix of the
concrete below the water level. Abrasion accelerates
the deterioration of the surface.
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Damaged areas can be effectively reinstated with Monomix
or, where rapid reinstatement is required: Fastfill.
Both offer long-term durable repairs with excellent
chemical resistance.
An overall application of Cemprotec E942, incorporating
advanced cement chemistry, fibre, epoxy and styrene
acrylic copolymer technology protects existing concrete
from further deterioration. |
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(3) Bacteria
present in sewage form acidic gases which, in confined
areas, condense on surface and are broken down to
form sulphuric acid which readily attacks concrete.
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Surfaces can be reinstated with Monolevel 844SP
prior to overcoating with Cemprotec E942. This
unique epoxy and cement modified polymer coating offers
excellent resistance to strong acids as well as the
aggressive cocktail of chemicals found in sewage. |
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(4) Corrosion
of ferrous metals in aggressive sewer environments.
Lack of corrosion protection from aggressive condensates
reduces the life span of the structure.
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Cemprotec E942 can be applied to the substrate
with minimal preparation. It offers exceptional stand-alone
protection, making it ideal where accessibility is
limited and working conditions are difficult. It is
able to tolerate application to damp surfaces with
much lower levels of preparation than conventional
coating systems. Cemprotec E942 chemically
accelerates the passivation of ferrous metals and
provides a barrier to the ingress of water and oxygen
— the fuels for corrosion.
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(5) Concrete
or brick manhole chambers are particularly prone to
chemical attack due to the build up of gasses and
condensates.
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Rapid reinstatement of the chamber can be carried
out using Fastfill, a fast setting Portland
cement based repair mortar with excellent sulphate
resistance. A 2mm coat of Cemprotec E942, applied
in 2 coats by brush will provide long-term protection
from acids and chemicals. Areas can be quickly and
effectively treated, minimising disruption.
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(6) General
degradation of the infrastructure needs cost- effective
repair and coating solutions.
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Flexcrete offers a wide range of repair systems to
match the equally wide range of reinforced concrete
structures that form an integral part of the water
industry infrastructure. Based on Flexcrete’s core
technology: a unique blend of polymers, microsilica
and fibres, the products include wet sprayed, dry
sprayed, rapid setting, pourable and trowel applied
repair mortars: Monomix WS, Monogun,
Fastfill, Monopour and Monomix.
When repairs have been carried out, an anti-carbonation
and decorative finish can be achieved by applying
Monolastex Smooth. The Flexcrete Concrete Repair
and Protection System has BBA Approval. |
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