Concrete is a construction material consisting of conglomerate gravel, pebbles, broken stone or slag in a mortar or cement matrix. Masonry is building and fabricating in stone, clay, brick, or concrete block. Masonry also refers to the building units (stone, brick, etc.) themselves.

The cement masons then pour or direct the pouring of the concrete into the forms so that it flows smoothly. The cement masons or their helpers spread and tamp the fresh concrete into place. Then they level the surface by moving a straightedge back and forth across the top of the forms.

Masonry and concrete are not the same thing; as a general rule, masonry is referring to the bricks, stones, and blocks used while concrete refers to a type of cement, other materials, and water that can be set into large forms to make a building without the smaller units of stones or bricks stacked upon each other.