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ASTM C331-05

Current Revision

Standard Specification for Lightweight Aggregates for Concrete Masonry Units

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1.1 This specification covers lightweight aggregates intended for use in concrete masonry units when a prime consideration is to reduce the density of the units.

1.2 The values stated in SI units are to be regarded as the standard. The values shown in parentheses are for information purposes only.

1.3 The text of this specification references notes and footnotes which provide explanatory materials. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.


This specification covers lightweight aggregates intended for use in concrete masonry units when a prime consideration is to reduce the density of the units. Three general types of lightweight aggregates are covered by this specification: aggregates prepared by expanding, palletizing, or sintering products such as blast-furnace slag, clay, diatomite, fly ash, shale, or slate; aggregates prepared by processing natural materials such as pumice, scoria, or tuff; and aggregates consisting of end products of coal or coke combustion. The aggregates shall be composed predominately of lightweight-cellular and granular inorganic material. The aggregates shall not contain excessive amounts of deleterious substances, as determined by organic impurities, staining, and loss on ignition tests. Lightweight aggregate under test shall meet requirements for clay lumps and friable particles, uniformity of grading, loose bulk density, uniformity of loose bulk density, popouts, resistance to freezing and thawing, and drying shrinkage.


SDO ASTM: ASTM International
Document Number C331
Publication Date Dec. 15, 2005
Language en - English
Page Count 4
Revision Level 05
Supercedes
Committee C09.21
Publish Date Document Id Type View
Dec. 15, 2005 C0331-05 Revision
Jan. 1, 2004 C0331-04 Revision
Dec. 1, 2003 C0331-03A Revision
Feb. 10, 2003 C0331-03 Revision
July 10, 2002 C0331-02 Revision
Jan. 10, 2001 C0331-01 Revision
Jan. 10, 2001 C0331-00 Revision