A layer of mortar, usually 1 €8 to 1 €2 in. (3 to 13 mm) thick, which is spread on a moist and prepared, hardened concrete surface prior to laying fresh concrete.
A layer of mortar, usually 1 €8 to 1 €2 in. (3 to 13 mm) thick, which is spread on a moist and prepared, hardened concrete surface prior to laying fresh concrete.