Lehigh Hanson Masonry Cements

Lehigh Hanson’s Type N Masonry Cement is perfect for many brick, block, and stone masonry applications — and can be used for stucco, also. It provides Type N strength in accordance with ASTM specification.

PRODUCTS AND STANDARDS

Masonry cement Types N, S and M are covered by ASTM C91, Standard Specification for Masonry Cements.
Mortar cement is covered by ASTM C1329, Standard Specification for Mortar Cement.
Mortar must conform to ASTM C270, Standard Specification for Mortar for Unit Masonry.

Masonry cement consists of portland or blended cement, plasticizers, and an air entraining agent. Air-entraining agents protect mortar from freeze-thaw damage and provide additional workability. The specific components of masonry cement may vary depending on the manufacturer and local construction practices. ASTM C91 defines masonry cement by physical requirements and performance properties rather than ingredients.

Mortar cement, a relatively new designation, was developed for demanding structural applications and features higher strength and lower air content than masonry cement. It is the only cement for mortar that must meet a minimum bond strength. For that reason, it conforms to a separate ASTM designation, C1329, Standard Specification for Mortar Cement.

Cement-lime masonry cement consists of portland cement and hydrated lime. The lime serves as a plasticizer. Cement/lime blends in Types N, S and M are covered by ASTM C270 only, Standard Specification for Mortar for Unit Masonry, since the two components, portland cement and lime, are each covered by their respective specifications: ASTM C150, Standard Specification for Portland Cement, and ASTM C207, Standard Specification for Hydrated Lime for Masonry Purposes.

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