ASTM C332 − 09 Standard Specification for Lightweight Aggregates for Insulating Concrete

Scope of ASTM C332 − 09 Standard Specification for Lightweight Aggregates for Insulating Concrete

1.1 This specification covers lightweight aggregates intended for use in concrete not exposed to the weather, in which the prime consideration is the thermal insulating property of the resulting concrete.

1.2 The text of this standard 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.

1.3 With regard to sieve size and the size of aggregate as determined by the use of testing sieves, the values in inch pound units are shown for the convenience of the user; however, the standard sieve designation shown in parentheses is the standard value as stated in Specification E11.

Classification of ASTM C332 − 09 Standard Specification for Lightweight Aggregates for Insulating Concrete

3.1 Two general types of lightweight aggregate are covered by this specification as follows: 3.1.1 Group I—Aggregates prepared by expanding products such as perlite or vermiculite.

NOTE 1—These aggregates generally produce concrete having a density from 15 to 50 lb/ft3 (240 to 800 kg/m3), the thermal conductivity of which may be expected to range from 0.45 to 1.50 Btu·in/h·ft2 ·°F (0.065 to 0.22 W/m·K).

3.1.2 Group II—Aggregates prepared by expanding, calcining, or sintering products such as blast-furnace slag, clay, diatomite, fly ash, shale, or slate; and aggregates prepared by processing natural materials, such as pumice, scoria, or tuff.