Masonry Magazine April 1997 Page. 21

Masonry Magazine April 1997 Page. 21
Table 1 - Proportion Specifications for Mortar (Adapted from ASTM C 270)

| Mortar | Type | Portland Cement or Blended Cement | Masonry Cement M | Masonry Cement S | Masonry Cement N | Hydrated Lime or Lime Putty | Aggregate Ratio (Meassured in Damp Loose Conditions) .
Table 2 - Property Specifications for Mortar (Adapted from ASTM C 270)*

| Mortar | Type | Average Compression Strength at 28 Days, Min. psi (MPa) | Water Retention min.% | Air Content, max.% | Damp, Loose Conditions)