Standard mortar, also known as Portland cement mortar, is a mixture of Portland cement, sand, and water. It is commonly used for various masonry applications, including laying bricks, blocks, and stone.
Lime mix mortar, on the other hand, is a mixture of lime, sand, and water. It is a traditional type of mortar used before the introduction of Portland cement. Lime mortar has been used for centuries and is still utilized today for its unique properties.
Here are some key differences between standard mortar and lime mix mortar:
1. Composition: Standard mortar is primarily composed of Portland cement, while lime mix mortar contains lime as the primary binding agent. Lime mortar generally has a higher lime content compared to standard mortar.
2. Flexibility: Lime mortar is more flexible and capable of accommodating slight movement and settling of masonry structures. This flexibility helps prevent cracking and damage to the masonry.
3. Breathability: Lime mortar is breathable, allowing moisture to escape from the masonry. It helps prevent the buildup of moisture within the masonry, reducing the risk of decay and deterioration.
4. Traditional aesthetics: Lime mortar is often preferred for its traditional appearance. It provides a softer and more textured finish compared to the more rigid and modern appearance of standard mortar.
5. Compatibility with historic structures: Lime mortar is commonly used in the conservation and restoration of historic buildings due to its compatibility with historical masonry. It helps maintain the integrity and authenticity of these structures.
It's worth noting that lime mix mortar may take longer to set and achieve full strength compared to standard mortar. However, the specific requirements and recommendations for mortar choice may vary depending on the project, local building codes, and regional practices. It is advisable to consult with a professional or reference specific guidelines for your specific application.