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Mortar types: (continued)
Type N =
1 part Portland Cement
1 part Hydrated Lime
6 parts sand
or
1 part Type II masonry cement
3 parts sand
Type O =
1 part Portland Cement
2 parts Hydrated Lime
9 parts sand
or
1 part Type I or II Cement
3 parts sand
Masonry cement 94 pounds per cubic foot
Portland cement 94 pounds per cubic foot
Hydrated lime 40 pounds per cubic foot
Sand
85 pounds per cubic foot
Type N mortar =
1 part cement
= 1 x 94
= 94 pounds
1 part lime
= 1 x 40 = 40 pounds
6 part sand
= 6 x 85 = 510 pounds
Totals
= 8 cubic feet
644 pounds
In other words, one cubic foot of type N mortar
weighs 644 pounds
÷
8 = 80.5 pounds per cubic
foot.
For more mortar descriptions see ASTM spec.
C270-86 b.
There are many specialized mortar
uses, such as chimney, reinforced masonry, and
acid-resistant mortars. (
American Society for
Testing and Materials.)