UHPC HT and Refractory - The difference

UHPC HT Products

UHPC, Ultra High Performance Concrete, is a combination of a cement, micro particles and wear resistant (very hard) particles. Due to the 

micro particles it is possible to create a perfect physical packing ensuring improved chemical reactions. These chemical reactions secures the formation of minerals with superior properties at room temperature. Hence around 60% of the full strength will be obtained after 48 hours. Final strength of a UHPC is 100-250 MPa / 14500-36250 psi.

Water added to UHPC to secure a proper 

rheology is limited, and shortly after setting there will be no more free water in the system, as all water will be bond in the structure of the chemical reactions.

When heating UHPC HT the risk of cracking due to evaporation of water is limited. However too fast heating of a virgin installation could lead to this. Hence it is recommended to firstly heat up the installation at a rate of 50°C/hr. The heating does not contribute to the strength of the system however it will increase the rate of strength building.

Refractories

Unshaped refractories typically contains an alumina cement as the bonding material and other metallic minerals depending on the 

temperature and environment it is installed. Water is mixed in to create the right rheology for installation. As such this product at ambient 

temperature can be viewed as an ordinary mortar. As such the product is relative porous and strength at ambient temperature is not likely 

to exceed 45 MPa. This system will also reach around 60% of final strength after 48 hours of hydration.

This system will contain free water after installation, hence there is a risk of cracking when heated. Hence it is necessary to heat it at specific heating rate in order to avoid such cracks. In order for refractories to work they need to be heated so that the metallic minerals is calcinated 

and sintered into the wanted minerals with the needed properties.

Comparison

The strength and density of UHPC HT is a lot higher than that of refractories. Hence these products will be better at withstanding inner pressure from internal water evaporation, reducing the risk of cracks and ultimate process destruction of the product.

UHPC HT does not need heat to form the minerals needed in the mix in order to obtain the properties. 

Heat will however increase the rate of property formation.

 

Brazil UHPC Wear protection lining of a BF Top Gas Cleaning system

 BF Top Gas Cleaning

The Paul Wurth gas cleaning system for the Thyssen Steel Brazil furnace was one of several Paul Wurth gas cleaning systems we supplied with UHPC wear protection complete the wear protection. The installation was carried out by a local installation company.

We installed the anchors directly at the steel construction company. The UHPC wear protection lining was then lined on site at the steel mill in the installed condition. The total lining area was approximately 1200 sqm. The layer thickness was specified by the plant builder from 25 mm to 40 mm depending on the area in the cyclone. 

    

UHPC Mortar 2000 HT was specified by our customer as the wear protection material. UHPC Mortar 2000 HT is enormously wear resistant even at continuous temperatures up to 1200°C. The cyclone should have a normal average operating temperature of 400 - 500°C. However, it is possible that hot gases up to 1000°C may enter the cyclone uncontrolled from blast furnace.

 

The planned service life is at least 10 years. During these 10 years the blast furnace will not be stopped and therefore repair of the cyclone will be possible only under very difficult conditions.

WPE DK International

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

 

SouthAfrica UHPC Wear protection lining of a BF Top Gas Cleaning system

BF Top Gas Cleaning

The Paul Wurth gas cleaning system for the Newcastle Steel plant blast furnace was one of several Paul Wurth gas cleaning systems we supplied with UHPC wear protection complete the wear protection. The installation was carried out by a local installation company.

We installed the anchors directly at the steel construction company. The UHPC wear protection lining was then lined on site at the steel mill in the installed condition. The total lining area was approximately 400 sqm. The layer thickness was specified by the plant builder from 25 mm to 40 mm

depending on the area in the cyclone.

UHPC Mortar 2000 HT was specified by our customer as the wear protection material. UHPC Mortar 2000 HT is enormously wear resistant even at continuous temperatures up to 1200°C. The cyclone should have a normal average operating temperature of 400 - 500°C. 

However, it is possible that hot gases up to 1000°C may enter the cyclone uncontrolled from blast furnace.

 

The planned service life is at least 10 years. During these 10 years the blast furnace will not be stopped

and therefore repair of the cyclone will be possible only under very difficult conditions.

WPE DK International

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

South Korea UHPC Wear protection lining of a BF Top Gas Cleaning system

BF Top Gas Cleaning

The Paul Wurth gas cleaning system for the Hyundai blast furnace was one of several Paul Wurth gas
cleaning systems we supplied with UHPC wear protection complete the wear protection. The installation was carried out by a local installation company.

We installed the anchors directly at the steel construction company. The UHPC wear protection lining was then lined on site at the steel mill in the installed condition. The total lining area was approximately 1000 sqm. The layer thickness was specified by the plant builder from 25 mm to 40 mm depending on the area in the cyclone. 

          

UHPC Mortar 2000 HT was specified by our customer as the wear protection material. UHPC Mortar 2000 HT is enormously wear resistant even at continuous temperatures up to 1200°C. The cyclone should have a normal average operating temperature of 400 - 500°C. However,

it is possible that hot gases up to 1000°C may enter the cyclone uncontrolled from blast furnace.

 

The planned service life is at least 10 years. During these 10 years the blast furnace will not be stopped and therefore repair of the cyclone will be possible only under very difficult conditions.

WPE DK International

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

UHPC HT lined Blades /guide vanes for a Paul Wurth cyclone in a steel plant

Once again we supplied blades / vanes for a Paul Wurth dedusting cyclone. Over the last years we have manufactured and delivered more than 210 blades / vanes of different sizes. We delivered for new projects or for spare parts supply.
The blades are lined on both sides with 25 mm thick UHPC HT (high temperature resistant UHPC). 

Each delivery is extensively tested by us. 

It has been proven over the years that the blades manufactured by us can withstand the maximum loads in a blast furnace dedusting for years.

WPE DK International

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

High temperature resistant UHPC pavement

Constant very high temperatures and high
loads cause high damage to stone or concrete
floors.
Last year we re-lined a floor in the steel collis
warehouse with UHPC HT. The freshly rolled
steel collis have an average weight of 20 tons
and are still more than 280°C / 536°F warm
for a few days when they are stored. The
radiant heat has caused massive damage to
the floor area in most areas of the hall. In
addition, the hot collis are driven from the
rolling mill into the warehouse with special
forklifts and placed correctly.

The routes in the warehouse had to be
completely renovated for safety reasons.
Since the ground was so bumpy, there was
a risk that a forklift with the hot colli might
fall over.

For this reason, the old floor was completely
removed. The subbase floor was rebuilt and
carefully compacted. Subsequently, at least
50 mm /2 inch thick UHPC HT high temperature
resistant flooring, which also has a very high
compressive strength and wear resistance, was laid.
In the UHPC HT floor covering, two-layer
reinforcement was introduced in order to absorb
the shear stresses that are generated by the heavy
forklift movements.
We relined approx. 1000 sqm hall floor. 

WPE DK International

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

 

 

UHPC wear protection an example from the steel industry

BF Top Gas Cleaning

UHPC has been specified as a wear protection material in a new dedusting cyclone for a blast furnace by one of the world's largest plant manufacturers in the steel industry. 

We installed the anchors directly at the steel construction company. The UHPC wear protection lining was then lined on site at the steel mill in the installed condition. The total lining area was approximately 1000 sqm. The layer thickness was specified by the plant builder from 25 mm to 40 mm depending on the area in the cyclone. 

          

UHPC Mortar 2000 HT was specified by our customer as the wear protection material. UHPC Mortar 2000 HT is enormously wear resistant even at continuous temperatures up to 1200°C. The cyclone should have a normal average operating temperature of 400 - 500°C. However, it is possible that hot gases up to 1000°C may enter the cyclone uncontrolled from blast furnace.

 

The planned service life is at least 10 years. During these 10 years the blast furnace will not be stopped and therefore repair of the cyclone will be possible only under very difficult conditions. 

 

 WPE DK International

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

UHPC Verschleißschutz in Müllverbrennungsanlagen

In modernen Müllverbrennungsanlagen werden heute in großen Mengen Hausmüll und Industriemüll zwecks Energie- und Prozessdampfgewinnung verbrannt.

Das Verbrennen von Müll stellt durch die diskontinuierliche Müllqualität erhebliche Anforderungen an die Prozessanlagen und deren Konstruktionsmaterial.

Anforderungen:

• Glatte Oberflächen
  

• Fugenlose Oberflächen

• Resistent gegen schnelle Temperaturschwankungen

• Temperaturbeständigkeit bis über 1.000°C

• Hohe Druckfestigkeit

• Hohe Verschleißfestigkeit

• Gute thermische Isolierwirkung

• Flexible Schichtstärken

• Gute chemische Beständigkeit
  

• Gute Widerstandsfähigkeit gegen

  mechanische Belastungen
  

 

 

Auskleidungsbereiche:

• Fahrwege der Müllfahrzeuge bis zum

  Abwurfbereich im Müllbunker

• Müllbunkerrampen und Wände

• Müllaufgabebunker

• Müllförderkanal bis zur Brennerrostaufgabe

• Asche-/Schlackeförderung

• Entstaubungssysteme

   

WPE DK International

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

Use of UHPC HT construction material in extreme fire temperatures

20 years ago we started as the only one in the world to use high temperature resistant HT UHPC in areas
up to 1200°C / 2192°F. We use this material under the most extreme wear and temperature conditions in industry. High temperature resistant UHPC HT can be used as construction material, radiation insulation, floor material, wear protection and corrosion protection.

We produce this material in several qualities as mortar, castable and shotcreate.

Constructions made from our UHPC HT material can withstand very high temperatures for a very long
time. Steel and concrete structures are protected in steel plants, power plants, offshore platforms, civil construtions, refinery, chemical plants etc. with UHPC HT material.

A few years ago we started to develop UHPC HT materials for architectural applications. Today residental housing constructions can be built for example to withstand wild fires and fire storms for long period of time. There are already the first companies that want to manufacture doors and window security systems from UHPC HT. If windows and doors were to be secured against high temperatures, a fire from outside would have no way of penetrating the house.

These high-temperature UHPC HT are also available with mixed thermal insulation.

In public buildings, escape routes, stairwells and supporting structures can be secured against fire and destruction. UHPC HT can be processed in the same way as normal concrete.

UHPC HT is not only extreme fire-resistant and thus protects life, UHPC HT has a very high load-bearing capacity, no water can penetrate UHPC HT constructions at flooding
situation, UHPC HT can be perfectly processed as a tilt-up and precast construction and is absolutely resistant to all types of fungi and termite infestation. UHPC HT has also been used in the military and in security technology for many years.

 

WPE DK International

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

UHPC ThermCombi lining systems

UHPC ThermCombi lining system consists of

a highly effective insulating layer and UHPC

wear protection layer

For a cement plant in Europe, we should

create a technically optimal possibility that
a complicated hot gas line is provided with

wear protection against a very abrasive

material and at the same time the gas

temperature must not drop below 700°C /

1292°F. A similar project we had years ago

for a steel plant in Asia.

In order to meet these customer requirements,

we have chosen a UHPC ThermCombi lining

system.

We reduced the temperature for the steel

structure to 80°C / 176°F. That was no problem

with the insulation material we chose. A high

temperature resistant UHPC wear protection
layer was installed on the insulation layer.

The advantage over a traditional refractory
lining is:
 - The combination lining was about 60% lighter
      in weight than a refractory lining.
 - The total layer thickness of the combination
      lining was 400% less than that of a standard
      refractory solution.
 - This meant that the steel pipe diameter was
      much smaller than with a refractory lining
      and the supports had to carry much less weight.
 - UHPC HT wear protection can withstand

      temperatures of 1200°C / 2192°F, which was

      an additional security in this project.

 - UHPC HT wear protection is several times more
      wear-resistant than refractory concrete, which
      has resulted in a significantly longer service life

      and much less maintenance.

 

Today, the new UHPC ThermCombi systems are not only used in the steel, power plant and cement industries. The construction industry has also recognised the enormous advantages for building structures and façade constructions. It is not only the insulating properties that save energy, the significantly lower material consumption and the very light precast weight - it is especially the fire and heat resistance that makes UHPC ThermCombi building constructions very safe constructions.