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Flexible and stainless metallic fibres for repairs to concrete water containment structures
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FIBRAFLEX metallic fibres improve the mechanical properties and durability of the concrete and mortar used for repairs.
The "fibre + concrete" solution enables the repair of damaged structures which are in constant use such as :
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Main sewers with inspection hatches
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Storm water soak-aways
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Waste water treatment plants
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Dams
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Water towers
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Concrete pipes
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Utilisation
The fibres are added to the concrete or mortar during the mixing of the dry components. The repair can then be effected :
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Either by spraying the fibred concrete or mortar, as a dry or wet mix, using a standard shotcreting machine (Putzmeister®, Aliva®, etc.)
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Or by casting the concrete in shuttering
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Typical dosage : from 15 to 30 kg/m³
Product references used :
FIBRAFLEX FF30L6, 30 mm long and 1,6 mm wide
or
FIBRAFLEX FF20L6, 20 mm long and 1,6 mm wide
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Example : a sewage pipe with a cracked sidewall
(H. 180 cm)
In this example the proposed solution is a sprayed wet mortar, reinforced with FIBRAFLEX FF20L6 fibres, to a thickness of 7 cm.
Advantages compared to using reinforcing mesh :
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20% time gain in use
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Directly spraying a fibred concrete, which is thus already reinforced, reduces the job time taken |
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Longer lasting
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Using stainless reinforcing means that the repair will be extremely durable |
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Optimised hydraulicity
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Spraying concrete reinforced with FIBRAFLEX fibres allows to reduce the thickness of the layer sprayed on and thus to limit the diminishing of hydraulicity |
Advantages compared to using a GRP shell :
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Cost-effectiveness
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A repair using prefabricated shells is 35 % more expensive than a repair using a concrete or mortar reinforced with FIBRAFLEX fibres |
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Ease and safety of use
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Due to their extreme flexibility, FIBRAFLEX metallic fibres can easily be sprayed on without any risk of splashback. A repair using fibred concrete is safer than a GRP shell for sewage workers when moving in the tunnels |
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