ASTM C332-07
(Specification)Standard Specification for Lightweight Aggregates for Insulating Concrete
Standard Specification for Lightweight Aggregates for Insulating Concrete
ABSTRACT
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. Two general types of lightweight aggregate are group I aggregates, which are prepared by expanding products, such as perlite or vermiculite, and group II aggregates which are 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. The thermal insulating properties of concrete made from the lightweight aggregate under test shall conform to the maximum average thermal conductivity indicated in the specification. To ensure reasonable uniformity in the gradation of successive shipments of lightweight aggregates, fineness modulus determination shall be made periodically. The aggregate shall be composed predominantly of lightweight cellular and granular inorganic material. The test methods for insulating concrete properties include specimen preparation, then concrete density determination, and determinacy of thermal conductivity. When lightweight aggregates covered by this specification are delivered in packages, the name of the manufacturer, type of aggregate, and minimum mass and approximate volume of the contents shall be plainly indicated thereon.
SCOPE
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 E 11.
1.3.1 With regard to other units of measure, the values stated in inch-pound units are to be regarded as standard.
The following precautionary caveat pertains only to the test method portion, Section 6, of the specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: C332 – 07
Standard Specification for
1
Lightweight Aggregates for Insulating Concrete
This standard is issued under the fixed designation C332; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* C177 Test Method for Steady-State Heat Flux Measure-
ments and Thermal Transmission Properties by Means of
1.1 This specification covers lightweight aggregates in-
the Guarded-Hot-Plate Apparatus
tended for use in concrete not exposed to the weather, in which
D75 Practice for Sampling Aggregates
the prime consideration is the thermal insulating property of
E11 SpecificationforWovenWireTestSieveClothandTest
the resulting concrete.
Sieves
1.2 The text of this standard references notes and footnotes
which provide explanatory material. These notes and footnotes
3. Classification
(excluding those in tables and figures) shall not be considered
3.1 Two general types of lightweight aggregate are covered
as requirements of the standard.
by this specification as follows:
1.3 With regard to sieve size and the size of aggregate as
3.1.1 GroupI—Aggregatespreparedbyexpandingproducts
determined by the use of testing sieves, the values in inch-
such as perlite or vermiculite.
pound units are shown for the convenience of the user;
however, the standard sieve designation shown in parentheses
NOTE 1—Theseaggregatesgenerallyproduceconcretehavingadensity
3 3
is the standard value as stated in Specification E11. from 15 to 50 lb/ft (240 to 800 kg/m ), the thermal conductivity of which
2
may be expected to range from 0.45 to 1.50 Btu·in/h·ft ·°F (0.065 to 0.22
1.3.1 With regard to other units of measure, the values
W/m·K).
stated in inch-pound units are to be regarded as standard.
1.4 The following precautionary caveat pertains only to the 3.1.2 Group II—Aggregates prepared by expanding, calcin-
test method portion, Section 6, of the specification: This
ing, or sintering products such as blast-furnace slag, clay,
standarddoesnotpurporttoaddressallofthesafetyconcerns, diatomite, fly ash, shale, or slate; and aggregates prepared by
ifany,associatedwithitsuse.Itistheresponsibilityoftheuser processing natural materials, such as pumice, scoria, or tuff.
of this standard to establish appropriate safety and health
NOTE 2—Theseaggregatesgenerallyproduceconcretehavingadensity
practices and determine the applicability of regulatory limita- 3 3
from 45 to 90 lb/ft (720 to 1440 kg/m ), the thermal conductivity of
2
tions prior to use.
which may be expected to range from 1.05 to 3.00 BTU·in/h·ft · °F (0.15
to 0.43 W/m·K).
2. Referenced Documents
3.2 The aggregate shall be composed predominantly of
2
2.1 ASTM Standards:
lightweight cellular and granular inorganic material.
C29/C29M Test Method for Bulk Density (“Unit Weight”)
and Voids in Aggregate
4. Physical Properties
C136 Test Method for Sieve Analysis of Fine and Coarse
4.1 Insulating Properties—The thermal insulating proper-
Aggregates
ties of concrete made from the lightweight aggregate under test
shall conform to the following limits:
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This specification is under the jurisdiction of ASTM Committee C09 on Maximum Average 28-Day Maximum Average
Oven-Dry Thermal Conductivity,
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
3 2
Bulk Density, lb/ft Btu·in/h·ft ·°F
C09.21 on Lightweight Aggregates and Concrete.
3
(kg/m ) (W/m·K)
Current edition approved July 15, 2007. Published August 2007. Originally
50 (800) 1.50 (0.22)
approved in 1954. Last previous edition approved in 1999 as C332 – 99. DOI:
90 (1440) 3.00 (0.43)
10.1520/C0332-07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.2 Grading—The grading shall conform to the require-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ments shown in Table 1.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C332 – 07
TABLE 1 Grading Requirements for Lightweight Aggregates for Insulating Concrete
Nominal Percentages (Mass) Passing Sieves Having Square Openings
Size
19.0-mm 12.5-mm 9.5-mm 4.75-mm 2.36-mm 1.18-mm 600-µm 300-µm 150-µm
Designa-
3 1 3
( ⁄4-in.) ( ⁄2-in.) ( ⁄8-in.) (No. 4) (No. 8) (No. 16) (No. 30) (No. 50) (No. 100)
tion
Group I
Perlite . . . 100 85 to 100 40 to 85
...
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