IntermediateTopic 36 of 100Materials & Chemical

Cement and refractories

Ceramics used for construction and furnaces.

In depth

Portland cement hydrates to a binding gel; refractories (fireclay, silica, magnesia, alumina) withstand furnace temperatures. Selection depends on temperature, chemical attack and thermal shock. Used in kilns, ladles and reactors.

Key points

  • Basic vs acidic refractories
  • Porosity and thermal conductivity
  • Castables
Example

Blast furnaces are lined with carbon and fireclay bricks.

Why it matters

Cement and refractories supply the binders and high-temperature linings that construction and furnaces depend on.

Where this is used

  • Specifying Portland cement for a concrete structure.
  • Lining a kiln with refractory bricks that resist high temperature.
  • Choosing a calcium aluminate cement for a sewer that is exposed to acid.

Frequently asked questions

What is Cement and refractories?

Ceramics used for construction and furnaces.

Why is it important to understand cement and refractories?

Cement and refractories supply the binders and high-temperature linings that construction and furnaces depend on.

What is Portland cement?

A hydraulic cement made by heating limestone and clay, which sets and hardens by reaction with water.

What is a refractory?

A ceramic material that keeps its strength and stability at very high temperature, used in furnace linings.

How is Cement and refractories used in practice?

Typical applications include specifying Portland cement for a concrete structure, lining a kiln with refractory bricks that resist high temperature and choosing a calcium aluminate cement for a sewer that is exposed to acid.

What should I learn before Cement and refractories?

Study "Glass" first (topic 35 of 100 in Materials & Chemical). It covers the groundwork this topic builds on.

What are the key points of Cement and refractories?

Basic vs acidic refractories. Porosity and thermal conductivity. Castables.

Can you give an example of Cement and refractories?

Blast furnaces are lined with carbon and fireclay bricks.

What comes after Cement and refractories?

The next topic is "Advanced ceramics", which builds directly on this one.

How difficult is Cement and refractories?

It is classed as Intermediate in Materials & Chemical (topic 36 of 100). It is an intermediate topic. Work through the beginner topics in Materials & Chemical first.

Learning path

Want to practise? Open the interactive course for quick checks, quizzes, simulations and progress tracking.

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