Dictionary of Moisture Protection & Restoration

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 1 part Portland Cement 2 parts Hydrated Lime 9 parts sand or 1 part Type I or II Cement 3 parts sand

Type O =

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 94 644 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.) = 94 pounds 1 part lime 6 part sand = 1 x 40 = 40 pounds = 6 x 85 = 510 pounds Totals = 8 cubic feet

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