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ASTM C 90 Document Information:
Title
Standard Specification for Loadbearing Concrete Masonry Units
ASTM International
Publication Date:
Jun 1, 2009
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
standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and
are not considered standard.
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:
- absorption
- concrete masonry units
- equivalent web thickness
- face shell
- flange
- lightweight
- linear shrinkage
- loadbearing
- medium weight
- normal weight
- webs
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