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ASTM C 90 REV B Document Information:
Title
Standard Specification for Loadbearing Concrete Masonry Units
ASTM International
Publication Date:
Dec 15, 2006
Scope:
This specification covers hollow and solid (see 5.3 and 5.4) 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: (1) normal weight, (2) medium weight, and (3) lightweight. These units are suitable for both loadbearing and nonloadbearing applications.
Concrete masonry units covered by this specification are made from lightweight or normal weight aggregates, or both.
The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
NOTE 1—When particular features are desired such as surface textures for appearance or bond, finish, color, or particular properties such as density classification, higher compressive strength, fire resistance, thermal performance or acoustical performance, these features should be specified separately by the purchaser. Suppliers should be consulted as to the availability of units having the desired features.
A Summary of Changes section appears at the end of this standard.
Keywords:
- flange
- linear shrinkage
- lightweight
- loadbearing
- normal weight
- concrete masonry units
- absorption
- medium weight
- face shell
- webs
- equivalent web thickness
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