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ASTM C90 – Standard Specification for Loadbearing Concrete Masonry Units


This specification covers hollow and solid concrete masonry units made from hydraulic cement, water, and mineral aggregates with or without the inclusion of other materials.

There are three classes of concrete masonry units: Normal Weight, Medium Weight, and Lightweight.

These units are suitable for both loadbearing and nonloadbearing applications.


absorption; compressive strength; concrete masonry units; equivalent web thickness; face shell; flange; lightweight; linear drying shrinkage; loadbearing; medium weight; normal weight; webs

ASTM C90 Accredited Laboratory

Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C90 standard.

Contact us for more information.