Mortar

Definition

A mixture of cement paste and fine aggregate; in fresh concrete, the material occupying the interstices among particles of coarse aggregate. In masonry construction, mortar may contain masonry cement or hydraulic cement with lime (and possibly other admixtures) to afford greater plasticity and workability than are attainable with standard hydraulic cement mortar. It is a substance used to join masonry units consisting of cementitious materials, fine aggregate, and water.

Purpose

Mortar is used to bond bricks, stones, and other masonry units together, providing structural integrity and stability to masonry constructions. It fills the gaps between units, ensuring even distribution of loads and enhancing the aesthetic appearance of the finished structure.

Examples of Use

• Bricklaying: Using mortar to bond bricks in the construction of walls, chimneys, and other structures.
• Stone masonry: Applying mortar to join stones in building retaining walls, facades, and pathways.
• Tile setting: Using a thin layer of mortar to adhere tiles to floors, walls, and countertops.

Related Terms

• Grout: A fluid mixture used to fill gaps between tiles or masonry units.
• Cement: A binder used in the production of mortar and concrete.
• Lime Mortar: A traditional type of mortar made with lime, sand, and water, used for historic masonry restoration.

Notes

• The properties of mortar can be adjusted by varying the mix proportions and adding admixtures to achieve the desired workability and strength.
• Proper mixing and curing of mortar are essential to ensure its performance and durability.
• Different types of mortar, such as Type N, Type S, and Type M, are specified for various applications based on their strength and other characteristics.