What is the combined mixture of cement, lime, sand, and water called?

The combined mixture of cement, lime, sand, and water is referred to as mortar. This mixture is specifically designed for bonding masonry units like bricks or blocks, as well as for various applications such as plastering walls. The components work together to create a strong, workable substance that adheres well to the surfaces it is applied to, allowing for structural integrity and versatility in masonry construction.

Mortar differs from concrete, which typically includes a larger aggregate like gravel or crushed stone and is used for structural applications due to its strength. Grout, another related material, is often used for filling voids in masonry or as a leveling agent and is typically composed of a higher water-to-cement ratio, lacking the lime component present in mortar. A slurry is a liquid mixture that may include cement and water primarily for the purpose of enhancing flowability, but it is not specifically intended for bonding materials in the same manner as mortar.

Thus, the mixture of cement, lime, sand, and water is precisely intended for use as mortar due to its unique properties that facilitate effective bonding of masonry units.