UHPC Concrete tower construction up to 300 meter

Industrial chimneys and lighthouses have always

been bricked up, and so well that they are still

fully functional to this day and would be a while

if they weren't torn down. Today you would not

be able to pay for such a construction method

and you would no longer have the time to assemble

it.

Large or tall towers such as TV towers, radio masts,

offshore / onshore wind turbines and similar

structures are made of steel or reinforcing concrete.

High-quality UHPC materials can take on

compressive strengths of more than 240 MPa /

34.800 psi and thus corresponding bending tensile

strengths without reinforcement.

With appropriate reinforcement, these values ​​can

be multiplied several times. Today, slim, high-

strength tower constructions are possible that

cannot be achieved with standard concrete. The

main tube construction of radio masts can also

be made entirely of UHPC today.

Towers for onshore and offshore wind turbines

are already made from UHPC prefabricated parts

or cast on site.

UHPC has many technical advantages over steel

or reinforced concrete structures. UHPC towers

are absolutely corrosion-resistant, quickly

installed and maintenance-free.

 

 

UHPC Doors and gate constructions

Doors and gates to buildings have been constructed
of wood all over the world for hundreds of years. A
material that was available everywhere. There were
simple doors and gates and there were incredibly
beautiful, filigree doors and gates. There were also
doors and gates that were used exclusively for
military security and where design was absolutely
irrelevant.

Today, doors and gates in architecture are made of
light metal or plastic. In industry and in security
areas, for example, doors and gates must be fireproof,
watertight, burglar-proof, explosion-proof, etc.

The list of requirements is long

Up to now, concrete as a material for doors and gates
was only possible for safe constructions, as concrete
constructions are very heavy.
With UHPC Ultra High Performance Concrete, the
possible uses changed completely.

UHPC material
 - achieves very high strengths
 - can be produced in relatively thin layers

 - is absolutely waterproof
 - is salt water resistant
 - is highly wear-resistant
 - can reach temperatures up to max. Withstand 1200°C
 - can withstand high blast pressures
 - is used in ballistics
 - can be shaped very precisely
 - can be easily combined with wood, metal, minerals and glass
 - is nanotechnology, the finest surface structures can be produced

 - enables the production of very small, fine concrete elements
 - enables large door geometries weighing several tons can be colored easily
 - is processed in a similar way to standard concrete

 

 

WPE DK International

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

UHPC Residential house construction and wooden residential house construction in case of a fire

I see the forest fires on the news and mourn the
destruction of nature and houses. We are
repeatedly asked whether it is not possible to
build fireproof houses with our UHPC.

Concrete and UHPC are non-flammable, so
basically you can say yes we can build fire-proof
houses.
Fireproof houses are not the whole solution to
this problem.

But let's start with the houses.

Most houses are made of wood, making them
a feast for any fire. The houses are set up at a
distance from the ground. In the event of a fire,
the fire is happy to attack from anywhere.
The roofs also often have rear ventilation,
which is like a Christmas present for the fire
and life-threatening for the fire brigade. The
roof still looks good, but underneath it is
burning, whoever goes on such a roof is, in
my opinion, tired of life. Of course you have
large glass surfaces or glass doors to the terrace in the living room, which is of course also made of wood, after all you want to enjoy the wonderful panorama. The fire loves such glass fronts, they are like open barn doors to the fire. The same applies of course to the large entrance area with a wonderful large wooden door.

So there is nothing in this type of house construction that can stop a fire. The photos taken after a fire confirm that there is nothing left.
It is possible to construct a house with UHPC, which keeps fire out for an extremely long time.

Houses can be constructed from precast concrete,
which increases quality, reduces assembly time
and reduces the total cost of a house. Compared
to standard concrete, the prefabricated parts can
be made much thinner. UHPC finished parts can
be removed from the mold very quickly. Due to
the thin UHPC panel construction, the elements
are lighter than those made of standard concrete
and can also be transported and installed more
quickly and easily.

It is also possible to mix thermal insulation into the UHPC material, which significantly reduces
the weight of the material construction. UHPC concrete is permanently heat-resistant up to 842°F.
We also produce high temperature resistant UHPC materials that are permanently temperature resistant up to 2192°F.

UHPC materials are naturally resistant to all types of insects and fungi.

Problem spot: Doors
UHPC can be used to produce doors that are similar in weight to wooden doors but are fire-proof and highly burglar-proof. With UHPC, door manufacturers can meet every design requirement in terms of surface structure, color and construction.

Problem spot: Windows, Glass Fassade
We can only help indirectly here. We are currently working with a window manufacturer to produce window frames from UHPC. Because window frames made of plastic or wood are flammable.
We are also currently developing window protection made of UHPC that closes the window in the event of a fire.

Problem spot: Roof

We can easily make a pitched roof or flat roof
from UHPC. A pitched roof can have any
desired surface design and color.

A wonderful fire protection is a flat roof with
greenery. Because of the soil that is required
for planting and which should always be kept
moist as possible, fire does not have the
slightest chance. The same can be done with facade surfaces. Today designers call it horizontal and vertical gardens. In many large cities, high-rise buildings with a green facade are now being built.

So we can easily provide fire-resistant house structures in the shortest possible time in cooperation with a locally available precast concrete plant and a locally available assembly company. Architects and designers have to take care of the development of the construction and the design.

Should the fire brigade use water, this is no
problem for a UHPC construction. Since water
does not penetrate the UHPC construction, the
interior can be cleaned and re-used quickly and
easily. A complete interior renovation as with
wood and plaster constructions is not necessary.

Annotation:
The best fire protection doesn't help if you build
houses right next to trees. When houses are far
from something flammable like trees, the fire has enormous problems jumping over these areas without fire fodder. That is also the reason why firebreaks are laid in forests when there is a fire. Landscape architects can offer many ideas for this.

 

 

WPE DK International

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

Machining UHPC concrete like metals

UHPC is a very unusual material that is still

far too little considered by architects and
designers. It is still viewed and processed
like a normal concrete.
Our view is more that we design and
manufacture UHPC to treat it more and more
like metal. UHPC in the right quality can
already be machined with tools from the metal
industry. Very high accuracies can be achieved
here whether in surface processing or in shape
processing.
The surface treatment can either be carried out
using special UHPC casting molds or by
identical processing steps as for metals, or
combined casting and subsequent processing.
There are no limits to the design options here.
In terms of shape, metalworking tools or machines
can be used with the same objective as metals.

Architects, designers and artists have not even
used a fraction of the technical possibilities.

One example is the use of computer-controlled
water jet cutting machines. For a customer, we
should test the possibilities of making special
bevel cuts as plate slots that cannot be cast in
this way. Additional cutting tests were carried
out to check which geometries can be cut and
what minimum wall thicknesses can be achieved
between the individual cuts. With the right
combination of UHPC binder, unit quality and
setting of the cutting machine, amazing results
can be achieved. The tested UHPC plates had a
plate thickness of 15 - 25 mm, no metallic
reinforcement and were dried for 48 hours in
normal ambient temperature before they were
processed.

With the UHPC binder-aggregate combination
used in the test, cutting distances of 5 mm could
be achieved.
As soon as possible, further cutting tests will be
carried out with UHPC desert sand binders.
Water jet cutting enables complete "images" to be cut in UHPC panels or special construction elements.
With this type of material / machine technology, it is possible to produce a large number of facade panels with an elaborate cut design at low cost in a short time.

WPE DK International

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

UHPC Bridge Deck Joint Filler BF

In many prefabricated concrete bridge constructions, the joints between the individual elements are filled
on site with a UHPC joint filler after the concrete elements have been installed. This creates a continuous concrete bridge deck.
Our BF joint filler systems have compressive strengths of 150 MPa - 220 MPa and flexural strengths of 14 MPa - 21 MPa.
The water to cementitious ratio is less than 0,22
Our BF System joint fillers can be processed on site with pan pot mixer, shaft mixer and horizontal mixer.
For very large sites with very large UHPC binder requirements we have mobile production plants for the binder and mobile mixing plants for the UHPC concrete. All plants are housed in containers and are therefore independent of weather conditions. With our mobile production plant for our UHPC joint filler systems, we are able to use local raw materials if suitable.

 

The joint filler BF systems can be used for all connections between adjacent box beams, next D beams, precast deck panels and beam haunch connections.
There is a wide range of concrete element connections. Each state in the USA and therefore DOT has its own specifications for these.

WPE DK International

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

A difference in the definition of UHPC is always a difference in quality

The American Federal Highway Administration (FHWA) defines UHPC as follows:

UHPC is a fiber reinforced, portland cement based product. Through the appropriate combination of advantagements in superplasticizers, dry constituent gradiation, fibre reinforcments and supplemental cementitious materials.

UHPC is a cementitious composite material composed of an optimized gradation of granular constituents, a water-to-cementitious materials 
ratio less than 0,20 and a high percentage of discontinuous internal fiber reinforcement.

The mechanical properties of UHPC include  compressive strength greater than 150 MPa and a flexural strength geater than 15 MPa.

We define our UHPC grades as Ultra High Performance Concrete but without steel fiber reinforcement.
For all our UHPC grades, whether cast, mortar or spray, we achieve the technical values without the addition of any fibers.

UHPC is a cementitious composite material composed of an optimized gradation of granular constituents, a water-to-cementitious materials ratio less than 0,20 and no procentage of internal fiber reinforcement.

 

The mechanical properties (without fiber reinforcement) of UHPC include minimum compressive strength of 150 MPa (up to 260 MPa and more) and a minimum tensile strength 15 MPa (up to 30 MPa and more). We achieve 70% of the maximum nominal strengths less than48 hours and not 28 days.

Of course, fibers of all possible qualities and geometries, steel reinforcements and a wide
variety of aggregates can be added to the UHPC concrete. On our website you will find a long list of
these materials that we have been using for over 20 years. But if we want to compare material with
material fairly, we have to compare the base with each other and that means the pure UHPC binder without fibers and reinforcements.

A difference in the definition of UHPC is always a difference in quality.

                     Our HPC and UHPC compressive strength standard

Comparison of UHPC and concrete during processing to precast concrete elements

The first UHPC Ultra High Performance Binder
was developed more than 30 years ago. Since
then they have been continuously developed.
The UHPC binders have been improved or new
ones have been developed and produced in
accordance with the requirements due to their
experience in a wide variety of application areas
and industries worldwide. From the beginning,
our UHPC binders were produced as mortar,
castable and shotcrete.

UHPC castables are inexplicably used to a much
lesser extent in the production of precast concrete
than standard concrete. These UHPC materials
could offer enormous advantages for manufacturing
as well as in the use of precast concrete parts.
Here are some applications and their advantages
compared to standard concrete:

 - Light weight of the UHPC elements. Due to the
    extremely high strength, smaller component cross
    sections can be selected, which leads to lower
    individual weights.
 - More elements can be loaded per truck, which leads

   to fewer loads.
 - Due to the lower individual weights, lower crane
    capacities are required.
 - The raw material requirement is drastically reduced
    due to the smaller component cross-section.
 - UHPC materials develop high strength values ​​in a
    short time. Our UHPC materials reach 70% of their
    nominal strength after 48 hours.
 - Shorter production times per element, higher cycle
    times - higher quantities per unit of time compared
    to standard concrete - lower unit costs.
 - Shorter delivery times.

UHPC binders are based on nanotechnology and 
are extremely fine.
Advantage:
It is possible to produce much more precise shapes.
Joints, edges do not require reworking. The more
precise the mold, the more precise the UHPC
element.
UHPC concretes do not form pores and are usually
self-compacting. This means that surface structures
can be achieved that cannot be achieved with standard concrete.

UHPC concrete is extremely resistant to most 
environmental influences
Advantage:
UHPC concretes are extremely resistant to
corrosion, de-icing salt and frost, which leads to a
much longer life expectancy than standard concrete
UHPC many times exceeds concrete, marble,
limestone, sandstone and many other natural stones.


www.hhbc-consulting.de
info@hhbc-consulting.de

Precast elements and Tilt-up manufacturing with HPC and UHPC concrete

HPC and UHPC concrete are very suitable for processing on the construction site in the Tilt-up system or in precast concrete plant. Residential housing and industrial buildings of all sizes can be manufactured using these two systems.

HPC and UHPC concrete has a long list of advantages over standard concrete

- High tensile strength- Extremely high compressive strength
- Very fast strength development
- UHPC elements have a very high production accuracy. If the mold is   exact, the element is exact.
- High chemical resistant
- Absolute corrosion resistant
- Even small layers already lead to an absolute waterproofness.

- Customer requirements such as burglary resistant, fire resistant, storm resistant and acoustic properties as well as noise reduction can be easily met.
- Combinations with a high-performance insulation layer reduce energy costs by several times compared to wooden houses or brick houses.
- The required wall thicknesses are only a fraction of comparable housing designs.

Tilt-up elements
Tilt-up elements are manufactured using locally produced molds and concrete in a wide variety
of HPC and UHPC concretes produced by us achieve 70% of their nominal strength in just 48 hours, the average nominal strength of our UHPC concretes is 140 MPa / 20000 psi.

Due to the compessive and flexuaral strength, it is possible to work with considerably smaller wall thicknesses, which leads to substantial material reductions and costs.
The extremely fast development of strength leads to faster assembly, the overall completion time is significantly reduced, which can also lead to cost reduction.

Precast elements
Prefabricated systems have been used in Europe for more than 50 years. There is a huge amount of standard residential house design variations from small houses, garages, workshops to entire building

complexes. Architects design exceptional prefabricated houses according to customer requirements. The elements are already manufactured and prepared weeks in advance in a precast plant, so that only a few days are needed on the construction site for a complete completion.
The advantage is the very small footprint on site.
The elements come with trucks in the correct assembly order on the construction site. A crane positions the elements and very few fitters are needed for assembly. It can be installed all year round, regardless of the weather contitions.

UHPC - Facades and Balconies

Many facades of public buildings such as
train stations, airports, banks, administrations,
etc. have almost incredible design in addition
to the necessary thermal function.
Then there are the steel and glass facades,
admittedly they fulfill their function perfectly,
but that's pretty much all that can be said
about them. And there are the old facades
that have aged with pride, which are made of
stones with some figures that bear history.

Each of these facades can tell a story, which
one can certainly not say of glass and steel
facades.
UHPC concrete can perfectly combine the
modern with the proud old design. UHPC
concrete is a modern material for the future
with incredible properties. It offers flexibility
in design, security in temperature and wear
resistance, durability in extreme strength and
very high resistance to almost all environmental
influences, detail in design, easy to use
compared to other materials, it can be processed
on site worldwide.

Facades of houses and balconies were almost
always characterized by their marked simplicity.
For some years now, more and more architects
and designers have been dealing with this area
and also because of the climate discussion.
Today you can see more and more interesting
solutions for facades and balconies of residential
buildings. Simple smaller and larger rectangular
balconies are disappearing more and more and
are being replaced by new balcony geometries.
The old idea of ​​greening facades is increasing
in urban centers. Today it is called the vertical
garden. In the course of this development, the
balconies also became gardens and, for some
architects, veritable forests.

Here too, UHPC concrete offer architects and
designers a variety of new technical and design
options. Due to the extremely high strength
values, balcony slabs can be made much thinner
than with a standard concrete or the balcony area
can be increased significantly with the same slab
thickness as with a standard concrete. As with
the facades, in addition to the strength, the

extremely high resistance to environmental
influences and the resistance to fire is a factor
of great interest.

UHPC concrete for precast production

UHPC concrete has many commercial as well as technical

advantages over standard concrete for the production of 

precast concrete elements.

More and more architects are specifying UHPC concrete 

as a standard material for their façade design. There are 

no design limits for façade constructions.
In recent years, we have developed UHPC binder systems 

that can be processed into lightweight concretes or 

insulating concretes, especially for façade construction.

- We produce UHPC materials with a strength of

   40 MPa to 240 MPa.
- Our UHPC materials reach 70% of their maximum

   nominal strength within 48 hours. Faster strength

   developments are possible on customer request.
- We only need sand, not gravel, to process UHPC

   concrete.
- With our UHPC Desert Sand Binder, desert sand

   can also be processed without any problems.
- All of our UHPC materials are self-compacting

   and need no or very little vibration.
- Our UHPC materials have extremely little to no pore

   development.
- The nanotechnology development of our UHPC

   binders enables extremely fine surface structures to

   be created.
- With the use of fibre reinforcement it is possible

   to create very thin structures of high strength.

- For prestressed elements, the pre-tensioning force
   of UHPC material can be chosen to be much higher
   due to their very high strength than standard concrete.

- Very good flow properties for casting complicated

   geometry and filigree surface structures.

Processing of UHPC binders
Only a shaft or pan pot mixer is required for

processing.
The UHPC binder is mixed with sand or desert

sand and a very small amount of water.
It is not necessary to add additives.

Applications

• Double walls 
• Pre stressed elements 
• Tubes
• Bridgedeck elements
• Stairs
• Piles
• Supports
• Tunnel segments
  
• Facade elements
  
• Balconies
• Sea defence units
  
• Floor tiles in large geometries                
  
• Security
  
• Vertical garden (facade) elements
• Sewage pipes and box culverts
• Floating elements