The Benefits of Adding Aggregates to Cement in Mortar

Cheaper, Lighter, and Stronger Mixtures

Adding aggregates to cement in mortar provides several benefits that make the mixture cheaper, lighter, and stronger, while also reducing susceptibility to water and freezing damage. Let's explore these advantages in more detail.

When it comes to mortar, the addition of sand plays a crucial role. By incorporating sand into the mortar mixture, it allows the bricks to "breathe" by enabling water to be drawn into the mortar instead of the bricks themselves. This prevents frost from freezing the water and potentially cracking the bricks. This is especially important in regions with colder climates.

Moreover, mortar is intentionally made softer than bricks. When freezing occurs, the mortar cracks instead of the bricks. This makes it easier to replace the mortar joints rather than having to rebuild an entire wall. By using mortar, repairs become more manageable and cost-effective.

It's important to note that cement is a general term, with Portland cement being the most commonly known type. However, there are other types of cement available, such as volcanic ash, fly ash, and tabby. Each type has its own unique properties and applications.

In addition to sand, the inclusion of aggregates in cement helps to bind the sand grains together. This increases the shearing force and makes it more difficult to break the mortar. The result is a stronger and more durable mixture.

While both mortar and concrete are used in construction, they have distinct differences. Mortar lacks the presence of gravel (aggregate), which is a key component in concrete. This absence of aggregate in mortar allows for better workability and adhesion to bricks.

The combination of cement and lime in mortar not only allows it to stick to bricks but also makes it weaker compared to concrete. This intentional weakness ensures that any cracks that may form will occur in the easily replaceable mortar joints rather than in the bricks themselves. This makes repairs simpler and less costly.

Adding aggregates to cement in mortar provides numerous benefits. It makes the mixture more affordable, lighter, and stronger, while also reducing vulnerability to water and freezing damage. The inclusion of sand allows bricks to "breathe" and prevents frost-related issues. Additionally, using mortar instead of cement makes repairs easier and more cost-effective. By understanding the advantages of incorporating aggregates into cement in mortar, builders and homeowners can make informed decisions for their construction projects.