Due to the old age and the increased and
rapidly increasing loads, for example due
to traffic and environmental influences,
an enormous number of concrete structures
are in need of renovation or have to be
completely replaced by new, more robust
structures. The renovation effort in the
infrastructure area is gigantic worldwide.
The focus here is on bridges.
UHPC Ultra High Performance Concrete
materials have many decisive advantages
over standard concretes when renovating
concrete structures. By using UHPC concretes,
material costs, assembly costs and assembly
times can be reduced and the service life of
the repaired concrete structures can be
extremely increased. Standard construction
machines can be used when installing UHPC
concrete.
The goals of repair or repair assembly are in
general
The restoration of stability and a stable concrete
cross-section
Due
to the enormously high strength values of
UHPC compared to standard
concrete and its
very fast strength development, the stability of
the
construction can be quickly restored.
UHPC mortar, castable and
shotcrete materials
can be used.
Increasing the load capacity
UHPC materials offer the structural
engineer and
bridge designer the option of significantly
strengthening
areas of the bridge structure that are
subject to high loads.
Maintenance or restoration of corrosion protection
and frost resistance
UHPC
is an almost non-porous material that is
absolutely frost and de-icing
salt resistant, even
with a very thin layer of material. UHPC is also
absolutely seawater resistant and can also be
processed underwater.
Thanks to these properties,
the repair effort for exposed reinforcements
is
significantly lower than for standard concrete.
Only half of the
material coverage is required
compared to standard concrete
Restoring or increasing the frictional resistance of
the concrete surface
Through
the addition of ceramic or mineral additives
and their very high
adhesion to the UHPC material,
any friction coefficient can be
guaranteed over a very
long period.
Restoring or increasing the fire resistance of components
UHPC HT (high temperature resistant) materials are
endurance-resistant up to over 1000°C /1832°F. All UHPC
materials are extremely resistant to shock temperature loads.
Increase thermal insulation
UHPC and UHPC HT in combination with
extremely
thin high-performance insulating materials can lead to
high-strength and highly insulating structures.
Permanently closing cracks with a static and sealing function
UHPC
Castable are based on nanotechnology, they are
extremely thin and
penetrate into the smallest pores or
cracks and seal them permanently.
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info@hhbc-consulting.de
