Lime

Find out more about Lime

Builders lime, also known as hydrated lime or calcium hydroxide, is a versatile material commonly used in construction and masonry. It is produced by heating limestone to a high temperature, which drives off carbon dioxide, leaving behind quicklime. When water is added, it undergoes a chemical reaction to form builders lime.

This material is prized for its ability to improve the workability of mortar and plaster, making it easier to apply and shape. Builders lime enhances the adhesion of these mixtures, allowing for stronger bonds between bricks or stones. Additionally, it helps to regulate moisture levels, which is crucial in preventing damage from trapped water.

Builders lime also has notable environmental benefits. It is a natural product that can contribute to sustainable building practices. Its use in construction can help reduce the carbon footprint of building projects, as it can be sourced locally and is less energy-intensive than some alternatives.

In terms of applications, it is often used in the production of mortars, which are favoured for restoration projects due to their flexibility and breathability. It can also be used in soil stabilisation, as it improves the load-bearing capacity of weak soils. Overall, it is an essential material in the construction industry, valued for its performance, sustainability, and versatility.

Lime FAQs

What is builders lime?

Builders lime, also known as hydrated or calcium hydroxide, is a fine white powder that is commonly used in construction and masonry. It is produced by heating limestone to high temperatures, which removes carbon dioxide, resulting in quicklime. When water is added to quicklime, it reacts to form.

This material is valued for its ability to improve the workability of mortar and plaster, making it easier to apply and shape. Builders lime enhances adhesion, allowing for stronger bonds between bricks or stones, and helps regulate moisture levels, which is crucial in preventing damage from trapped water. It’s also environmentally friendly, contributing to sustainable building practices.

How is builders lime made?

Builders lime is made through a two-step process. First, limestone (calcium carbonate) is heated in a kiln at high temperatures (around 900 to 1000 degrees Celsius) in a process called calcination. This heating removes carbon dioxide, resulting in quicklime (calcium oxide).

In the second step, water is added to the quicklime, which causes a chemical reaction that produces hydrated lime (calcium hydroxide). This final product is used in construction and masonry applications.

What are the uses of builders lime?

It has several important uses in construction and masonry, including:

Mortar: It is commonly used to create lime mortar, which is flexible and breathable, making it ideal for brick and stone work, especially in historic restoration projects.

Plaster: Builders it is used in plaster mixes to create smooth finishes on walls and ceilings.

Soil Stabilisation: It can improve the load-bearing capacity of soil in construction projects, making it useful for road construction and foundations.

Whitewashing: It is also used in lime wash for painting surfaces, providing a natural, breathable finish.

Water Treatment: It is used in water purification processes to adjust pH levels and remove impurities.

Agriculture: It can be applied to soil to improve acidity levels and enhance crop growth.

These applications highlight the versatility and benefits in various construction and environmental contexts.