What is : Quicklime Mortar

What is Quicklime Mortar?

Quicklime mortar is a type of mortar that is made by mixing quicklime, sand, and water. Quicklime, also known as calcium oxide, is produced by heating limestone in a kiln. When water is added to quicklime, a chemical reaction occurs, producing heat and forming calcium hydroxide, also known as slaked lime. This slaked lime is then mixed with sand to create quicklime mortar.

Properties of Quicklime Mortar

Quicklime mortar has several unique properties that make it a popular choice for construction projects. It has excellent workability, allowing for easy application and shaping. Quicklime mortar also has a high level of plasticity, making it ideal for intricate masonry work. Additionally, quicklime mortar has a fast setting time, allowing for quick construction progress.

Uses of Quicklime Mortar

Quicklime mortar is commonly used in historical restoration projects, as it closely mimics the composition of traditional lime mortars used in older buildings. It is also used in conservation projects to repair and stabilize historic structures. Quicklime mortar is preferred for these applications due to its compatibility with historic materials and its ability to allow for the movement of moisture.

Advantages of Quicklime Mortar

One of the main advantages of quicklime mortar is its breathability. Unlike modern cement-based mortars, quicklime mortar allows for the passage of moisture vapor, preventing the buildup of moisture within masonry walls. This breathability helps to protect historic buildings from damage caused by trapped moisture.

Disadvantages of Quicklime Mortar

While quicklime mortar has many benefits, it also has some disadvantages. Quicklime mortar can be more labor-intensive to prepare and apply compared to modern mortars. It also requires careful handling, as quicklime is caustic and can cause skin irritation. Additionally, quicklime mortar may not be suitable for all applications, as it is not as strong as cement-based mortars.

Conclusion

In conclusion, quicklime mortar is a versatile and traditional building material that offers unique advantages for certain construction projects. Its breathability, workability, and compatibility with historic materials make it a valuable choice for restoration and conservation work.