What Is Refractory Concrete | Advantages & Disadvantages of Refractory Concrete | Properties of Refractory Concrete | Application of Refractory Concrete

All About of Refractory Concrete

Introduction to Refractory Concrete:

The Innovation in the construction material is increasing day by day. There are various types of concrete are manufactured for various purposes in the construction Industry.

Refractory concrete is one of the special types of concrete which is generally used for the construction of structures that are subjected to extreme temperatures. The normal concrete cannot withstand at a high temperature and it may disintegrate and collapsed.

Here, In this article, we will be discussing about Refractory Concrete and its Applications and Properties, Advantages and disadvantages of Refractory Concrete.

What Is Refractory Concrete?

What Is Refractory Concrete

Refractory concrete is a special type of concrete which has a property of handling high temperatures. Refractory concrete is heat-resistant concrete which can withstand a high temperature.

Refractory concrete is also known as heat-resistant concrete. The main and primary ingredient which is used for the manufacturing of refractory concrete is high alumina cement or calcium aluminate cement.

Refractory concrete adopted when the structure has to be subjected to very high temperatures and it is not possible to use conventional concrete because it may suffer to complete loss of Mechanical properties and physical integrity.

Refractory concrete is used in the construction of the chimneys in the buildings because the chimneys are subjected to a high temperature so that it is necessary to use fire resistance concrete in its construction.

When the concrete is subjected to extremely high temperature it will lead to a decrease in the hydraulic bond due to which there is a reduction in the compressive strength of the concrete.

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Properties of Refractory Concrete:

Properties of Refractory Concrete

The properties of refractory concrete are as follows.

  1. The Refractory concrete has good compressive strength.
  2. Refractory concrete can withstand at extreme temperatures without any disintegration.
  3. Refractory Concrete also has good Tensile strength.
  4. It also has a very less amount of shrinkage as compared to conventional concrete.
  5. The specific gravity of refractory concrete ranges between 0 to 3.0.
  6. The amount of heat of hydration in the refractory concrete is less.

Reinforcement in Refractory Concrete:

The proper care should be taken while applying the Steel bar in refractory concrete because the refractory concrete is exposed to extremely high temperatures.

Due to extreme temperature, it will lose the bond between steel and concrete and there are chances of melting of steel at maximum temperature.

The high temperature can also cause spalling of the concrete and may develop cracks in the concrete due to which the reinforcement in refractory concrete may affect.

If the temperature will increase more than 300 degrees celsius then there will be chances of declination of the bond between steel and concrete.

If the temperature is increased beyond limit then behavior of the reinforcement will change and it will start to melt.

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Application of Refractory Concrete:

Application of Refractory Concrete

The application of refractory concrete is as follows.

  1. The construction of the chimneys is done with the help of refractory concrete.
  2. Refractory concrete is also used in the construction of launching pad and station required for a rocket.
  3. The application of refractory concrete also includes in the construction of fire training areas which consists of wide flat surface areas with fire-resistant rooms.
  4. Refractory concrete is generally used in the construction of the runway pavements and the concrete pavements which are subjected to high temperatures.
  5. The refractory concrete is also used for the construction of the nuclear reactor which is subjected to high temperature.

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Advantages of Refractory Concrete:

Advantages of Refractory Concrete

There are various advantages of refractory concrete as follows.

  1. Refractory concrete does not warp during the process of drying and firing.
  2. Refractory concrete has good compressive strength.
  3. Refractory concrete is strong and long-lasting.
  4. Refractory concrete in a world to which stands at extremely high temperatures.
  5. It can be moulded into any desired shape.

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Disadvantages of Refractory Concrete:

Advantages of Refractory Concrete

There are also some disadvantages of refractory concrete are as follows.

  1. Refractory concrete may cause harm to the environment as well as human beings.
  2. The particles of the refractory concrete may cause harm to the human body.
  3. The refractory concrete has good integrity and air tightness.

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Refractory Concrete

Refractory cement uses binding materials with improved thermodynamic properties to reduce the risk of mechanical failure. Fused minerals like aluminum oxide, or alumina, are used to bind coarse aggregate materials and provide superior temperature resistant properties without reducing the formability of the material.

What is Refractory Concrete?

Refractory mortar is a mix of cement, sand, fireclay and, other specialized ingredients such as calcium aluminate. Fireclay is a set of various clays that can resist heat up to 3,000 degrees Fahrenheit.

Refractory Concrete Mix

Portion the materials into a 1:2:2:0.5 ratio so you have 1 parts gravel, 2 parts sand, 2 parts refractory cement and 0.5 parts of the hydrated lime. Follow this ratio regardless of the volume of fireproof concrete you will be making.

Reinforcement in Refractory Concrete:

Refractory concrete is subjected to frequent temperature changes and tensile stress. To ensure long service life under high temperatures and thermal cycling, we recommend the addition of steel fibre reinforcement. The fibres are distributed throughout the concrete to limit the loads resulting from tensile stress.

Properties of Refractory Concrete:

Refractory cements and raw materials differ in terms of cement properties and material featuresCement properties include maximum use temperature, thermal conductivity, modulus of rupture (MOR) or flexural strength, compressive strength, particle or aggregate size, density, and shrinkage

Application of Refractory Concrete:

Concrete capable of retaining its physicomechanical properties within predetermined limits during prolonged exposure to high temperatures. Refractory concrete is used in the construction of thermal units and the foundations of industrial furnaces and other structures subjected to prolonged heating.

Advantages of Refractory Concrete:

It is essential for a cement to fulfill the condition of being durable.

Refractory Cement is specifically designed to be:
  • Strong.
  • Long-lasting.
  • Able to withstand the highest of temperatures.
  • Used in areas of intense heat and fire (because of using asbestos as primary ingredients).

Disadvantages of Refractory Concrete:

Though refractory cement has great strength when it falls it can harm the environment and also the people. The inner materials like asbestos can come out and mix with air particles.

2 thoughts on “What Is Refractory Concrete | Advantages & Disadvantages of Refractory Concrete | Properties of Refractory Concrete | Application of Refractory Concrete”

  1. why does refractory concrete mix need hydrated lime
    what is water cement ratio in refractory concrete mix of 1:2:2:0.5


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