Mortar is a paste-like substance primarily used for binding together bricks, stones, or other building units to create structures like walls or masonry . In the context of Australian commercial construction projects, mortar is typically a mixture of a binder (usually Portland cement), sand, and water
In Australia, the use of mortar in masonry construction is subject to certain standards and regulations. For example, mortar used for masonry construction must comply with AS 3700 or AS 4773 . Additionally, within 6 years and 6 months from completion of the work, mortar for masonry is considered defective if it is not in accordance with the requirements of the relevant standards.
The most common types of mortar used in Australian commercial construction projects include:
Cement Mortar: This type of mortar is made by mixing cement, sand, and water in specific proportions. It is widely used in bricklaying, blockwork, and stonework. Cement mortar provides excellent strength and durability, making it suitable for load-bearing structures.
Lime Mortar: Lime mortar is a traditional type of mortar that contains lime, sand, and water. It is commonly used in heritage and restoration projects due to its compatibility with older building materials. Lime mortar has excellent workability and flexibility, allowing it to accommodate minor movements and settlements in the structure.
Polymer Modified Mortar: Polymer modified mortar is a modern type of mortar that incorporates polymer additives to enhance its properties. It provides improved adhesion, flexibility, and weather resistance compared to traditional mortars. Polymer modified mortar is suitable for various applications, including bricklaying, rendering, and patching.
Rapid Setting Mortar: Rapid setting mortar is designed to set quickly, allowing for faster construction progress. It is commonly used in situations where a quick setting time is required, such as in repair works or when working in adverse weather conditions.
Fire Resistant Mortar: Fire resistant mortar is specifically designed to provide fire protection in commercial construction projects. It is made with fire-resistant materials and can withstand high temperatures, making it suitable for applications where fire safety is a concern.
The choice of mortar type depends on the specific requirements of the construction project, such as the type of building materials being used, the structural load, the environmental conditions, and the desired aesthetic appearance. It is essential to follow the manufacturer's guidelines and industry standards when selecting and using mortar in commercial construction projects to ensure the desired performance and longevity of the structure.
The use of mortar additives, such as TechdryAd, is also recommended for certain applications, such as concrete masonry construction in high-risk environments like surf clubs . However, the specific requirements for mortar use in Australian commercial construction projects may vary depending on the project's scope, location, and other factors.
It is essential to consult the relevant Australian standards and regulations, such as AS 3700 and AS 4773, for detailed information on the definition and use of mortar in commercial construction projects.
