Mixing building mortar involves combining specific proportions of sand and cement, along with water, to create a workable paste used for bonding bricks, blocks, or stones. A common method, particularly for bricklaying, uses a specific ratio to ensure the mix is appropriate for the application.
Understanding Mortar Mix Ratios
The ratio of sand to cement is crucial as it determines the mortar's strength, durability, and flexibility. Different types of masonry work may require different ratios. However, a widely used mix provides a good balance of strength and workability for many common projects.
Common Mortar Mix for Bricklaying
According to a video on mixing mortar by hand for bricklaying, to create a fairly strong mix, you typically use a specific ratio of sand to cement. It is important to note that you never want to make your mix stronger than the the brickwork or masonry around it.
The recommended ratio mentioned for this type of mix is:
- Under a three to one which is three sand and one cement.
This 3:1 ratio (3 parts sand to 1 part cement) is a standard starting point for many general-purpose applications where a fairly strong mortar is required, without being overly rigid compared to the surrounding masonry units.
Components of the 3:1 Mix
Here's a simple breakdown of the components for this common mortar mix:
- Sand: 3 parts (often building sand or sharp sand, depending on the finish and strength required)
- Cement: 1 part (typically Portland cement)
- Water: Added gradually to achieve the desired consistency
The General Mixing Process
While the reference primarily focuses on the ratio, the general process for mixing mortar involves:
- Combining the dry ingredients (sand and cement) in the correct proportions.
- Mixing the dry ingredients thoroughly until they are uniformly blended.
- Gradually adding clean water while continuing to mix, until the mortar reaches a smooth, workable consistency that is neither too wet nor too dry. It should hold its shape but be spreadable.
Achieving the right consistency is vital for easy application and proper bonding.
