Fast - Faster - UHPC Rapid for new installation and repair

For very fast assembly in the taxiway of an airport
we have delivered a special UHPC (Ultra high
Performance Concrete) Cast.

Last Airport project:
There had to be laid cable protection pipes in the
area of ​​the taxiway. For this purpose, a slot of
20cm / 7,87in wide, 100cm / 39,37in deep and
100meters /109yd long in the existing concrete
floor had to be milled. For the filling of the slot
after the cable protection pipes had been laid,
we delivered a quick-hardening UHPC Rapid
Cast. The setting time of this special UHPC
is 2-3 hours, depending on the environmental
conditions. After this time it reaches a strength
above 20 MPa / 2900 psi. The final strength
after 48 hours is about 80 - 100 MPa /
1160 - 14500 psi.


Originally the UHPC Rapid product series
was developed about 20 years ago for wear
protection repairs in steel plants, power plants,
mining plants and cement plants.
Later, the UHPC Rapid was used not only as
a mortar but also as a cast and shotcrete. The
UHPC Rapid shotcrete was particularly used
in mining tunnels and the UHPC Rapid Cast
was used in the new lining and repair of
roadways, roads, storage areas and industrial
floors.

Meanwhile, it is also used as repair material
in airports, on highways and bridges.

UHPC Shotcrete for new construction and repair projects

UHPC Shotcrete is a high strength, high density, fast curing UHPC concrete consisting of a UHPC nanobinder system and ceramic or mineral aggregates.

Due to the very high compressive strength in combination with a high material packing density and hard aggregates, a flexible and easy-to-process sprayable UHPC concrete with material properties that exceeds those of normal concrete by many times. All UHPC Shotcrete products are selfcompacting.

The high material density of UHPC Shotcrete prevents the penetration of liquid or gaseous foreign substances. UHPC Shotcrete achieves the maximum material properties only by wet spraying.

Fields of application for UHPC Shotcrete

 - Repair of bridges

 - Repair of dams and reservoirs

 - Seismic retrofit

 - Repair of sewers

 - Ground support - Stabilisation

 - Soil nailing

 - Tunneling

 - New construction of pools

 - New construction of foundation

 - Landscape design

 - Pools

 - Tanks

 - Domes

 - Foundation

UHPC Shotcrete system - more than 20 years in use

For large areas that are to be lined in a short time, 
UHPC Shotcrete is here a very good solution. 
UHPC Ultra High Performance Concrete qualities 
easily achieve minimum 120 MPa/1750 psi 
compressive strength.

UHPC Shotcrete material must be mixed before 
actually spraying. It is importance for the quality of 
UHPC Shotcrete that the amount of water is kept 
very precisely. Too much water reduces the material 
quality to a decisive extent. UHPC Shotcrete is using
a water/cement ratio of 0,2.
Our UHPC Shotcrete binders have a continuous 
temperature resistance up to 450°C/850°F. For 
temperatures over 450°C/850°F up to 
max. 1200°C/2200°F, we produce a UHPC HT High 
Temperature binder. The processing of the UHPC HT
version is carried out in the same way as with 
the normal temperature versions.

 

Characteristics of UHPC Shotcrete

 - No dust development, better working conditions
 - Due to the very high strength values, material
   layer thicknesses can be reduced
 - As with all other UHPC grades, a water
    impermeability is achieved from a layer
    thickness of 10 mm.
 - UHPC spray is very resistant to any corrosion
    attac
 - More constant concrete quality due to pre-
   defined water/cement content
 - Higher compressive strength with no
   fluctuations

 - Fast uniform strength development
 - Larger layer thickness due to more effective
   reaction of the additives
 - Low material rebound (below 2%)
 - Extrem good adhesion
 - Significantly larger spray performance
 - Minimal air consumption
 - Easy use of fibres
 - High security

UHPC Shotcrete in the new construction of tunnels or canals
Especially for tunnel construction, the use of UHPC
Shotcrete is an advantage. There is no need for high air
pressures like a standard shotcrete, UHPC Shotcrete is
self-compacting, the adhesive properties are extremely
good, so there is extremely little rebound and material loss.

A possible desired reworking of the surface is easily
possible without any effort. The material dust development during injection is extremely low.

UHPC shotcrete as repair material for existing tunnels or canals
Whether large or small tunnels and channel geometries whether concrete, steel or corrugated metal constructions can be repaired quickly, permanently and cost-efficiently.
Due to the fast development of strength, even larger repairs can be carried out quickly and efficiently with little machine outlay.
Due to the extremely good adhesion and corrosion resistance,
elaborate preparation is not necessary. With a simple high
pressure cleaning device, the loose particles should be
removed and then UHPC Shotcrete material can be installed.
Machines and material for minor repairs can be transported
without a problem with a normal pick-up vehicle.

 

WPE DK International

Phone: 0049 176 601 73146
E-mail: info@wpe-dk.dk
Homepage: www.wpe-dk.com