What is typically included in a standard mortar mix?

A standard mortar mix is typically composed of cement, sand, and hydrated lime. Hydrated lime is included in the mix to improve the workability and durability of the mortar. It helps to enhance the bonding properties and flexibility of the mortar, making it easier to work with and more resistant to cracking over time.

Gravel, while used in concrete mixes, is not a standard component of mortar because mortar requires a finer mix, primarily to bond masonry units. Heavy metal would be inappropriate and unsafe for such applications, as it does not serve any beneficial purpose in the mortar's composition. Cement alone would not achieve the desired performance characteristics that hydrated lime provides, resulting in a weaker and less durable mortar. Therefore, hydrated lime is essential for the structural integrity and functionality of a standard mortar mix.