What is the characteristic of type M mortar?

Type M mortar is characterized by its high compressive strength, typically around 2,500 psi or greater. This makes it well-suited for areas that require significant strength, such as in structural masonry applications and where the mortar must bear heavy loads. The mix includes a high proportion of Portland cement, which contributes to its strength compared to other types of mortar, providing it with enhanced durability and resistance to weathering.

In contexts such as construction and masonry, the choice of mortar type is crucial because it impacts the overall performance of masonry structures. Type M is often used in environments where the masonry needs to support high wind loads or in situations where it may be exposed to moisture.

The other characteristics, such as low heat retention, high plasticity, and lower durability, do not align with the properties of Type M mortar. Instead, it is known for its ability to ensure a strong bond, which is critical in maintaining the integrity of masonry constructions.