ASTM C 270 - 10 Standard Specification for Mortar for Unit Masonry

American Society for Testing and Materials (ASTM). Current edition approved June 1, 2010. Published July 2010. 14 p. This specification covers mortars for use in the construction of non-reinforced and reinforced unit masonry structures. Four types of mortar are covered in each of two alternative specifications: (1) proportion specifications and (2) property specifications.