The cement between bricks is called mortar.
Understanding Mortar
Mortar is essential in construction. It's not just cement; it's a mixture specifically designed to bind building blocks together. Here's a breakdown:
What is Mortar?
- Mortar is a workable paste that hardens over time.
- It's used to join building materials like:
- Stones
- Bricks
- Concrete masonry units
- According to the Wikipedia article on Mortar (masonry), mortar does more than just hold things together. It also:
- Fills and seals irregular gaps.
- Distributes the weight of the materials evenly.
- Can add decorative colors or patterns to walls.
Composition of Mortar
Mortar generally consists of:
- Cement: The binding agent.
- Fine Aggregate (Sand): Provides bulk and strength.
- Water: Activates the cement and makes the mixture workable.
- Lime (Optional): Improves workability and flexibility.
Why Not Just Use Cement?
Cement on its own would be too brittle and prone to cracking. The other ingredients in mortar give it the necessary:
- Workability: It needs to be easy to spread and use.
- Flexibility: It needs some give to withstand temperature changes and building movement.
- Bond Strength: It needs to adhere strongly to the building materials.
Different Types of Mortar
- There are various types of mortar designed for different purposes, such as:
- Type N: Common for general use above grade.
- Type S: Designed for high compressive strength.
- Type M: Stronger, used for below-grade applications.
- Type O: Weaker mortar suitable for interior work.
Conclusion
Mortar is the crucial material that binds bricks together, ensuring stability, structural integrity, and often adds aesthetic value. It's more than just cement; it's a carefully balanced mixture for optimal building performance.
