Black Sand

This construction-based material A workable paste called mortar is used to seal and fill uneven spaces between stones, bricks, and concrete masonry units. It is also occasionally used to add decorative patterns or colors to masonry walls. Typically, sand, water, and a binder are combined to make mortars. Although sand is often disregarded, its effects on the compressive strength, bond strength, workability, board life, drying shrinkage, and appearance of mortar make it worthy of careful consideration.