Sand: Masonry mortar typically uses a medium to coarse sand to provide strength and durability for binding bricks, blocks, or stones.
Cement: Portland cement is commonly used for its strong bonding properties.
Additives: Masonry mortar may contain additives like plasticizers to improve workability and water retention agents to prevent premature drying.
Sand: Plastering mortar usually requires fine sand to create a smooth and even finish on walls and ceilings.
Cement: It often contains less cement than masonry mortar to make it more workable.
Additives: Plastering mortar may include additives like retarders to extend the setting time and improve workability, as well as fibers for added strength.
Tile Adhesive Mortar
Sand: Fine sand is used to ensure good adhesion between tiles and the substrate.
Cement: Tile adhesive mortar contains cement for bonding, but it might have a different type or ratio compared to other mortars.
Additives: Tile adhesive mortar can contain polymers for enhanced flexibility and water resistance.
Floor Screed Mortar
Sand: A blend of coarse and fine sand is used to achieve a level surface.
Cement: A higher cement content is common to provide the necessary strength and durability.
Additives: Floor screed mortar may include plasticizers for improved flow and self-leveling properties.
Repair and Restoration Mortar
Sand: The choice of sand varies depending on the substrate and the type of repair needed.
Cement: Depending on the repair requirements, different cement types and proportions can be used.
Additives: Repair and restoration mortars often contain additives for enhanced bonding, adhesion to existing surfaces, and resistance to environmental factors.
In summary, the composition of dry mortar is tailored to the specific construction application. The variation lies in the type and gradation of sand, the type and amount of cement, and the inclusion of additives. These adjustments are made to meet the unique demands of each application, whether it’s for masonry, plastering, tiling, flooring, or repair work. The goal is to create a mortar mix that provides the necessary strength, workability, adhesion, and durability required for the intended use.