ASTM C332-23

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 E11.  
1.3.1 With regard to other units of measure, 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.  
1.4 The following precautionary caveat pertains only to the test method portion, Section 7, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-May-2023
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.21 - Lightweight Aggregates and Concrete

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C332 − 23
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 U.S. Department of Defense.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers lightweight aggregates in-
C29/C29M Test Method for Bulk Density (“Unit Weight”)
tended for use in concrete not exposed to the weather, in which
and Voids in Aggregate
the prime consideration is the thermal insulating property of
C125 Terminology Relating to Concrete and Concrete Ag-
the resulting concrete.
gregates
1.2 The text of this standard references notes and footnotes
C136/C136M Test Method for Sieve Analysis of Fine and
which provide explanatory material. These notes and footnotes Coarse Aggregates
(excluding those in tables and figures) shall not be considered C177 Test Method for Steady-State Heat Flux Measure-
ments and Thermal Transmission Properties by Means of
as requirements of the standard.
the Guarded-Hot-Plate Apparatus
1.3 With regard to sieve size and the size of aggregate as
D75/D75M Practice for Sampling Aggregates
determined by the use of testing sieves, the values in inch-
E11 Specification for Woven Wire Test Sieve Cloth and Test
pound units are shown for the convenience of the user;
Sieves
however, the standard sieve designation shown in parentheses
is the standard value as stated in Specification E11. 3. Terminology
1.3.1 With regard to other units of measure, the values
3.1 Definitions:
stated in inch-pound units are to be regarded as standard. The
3.1.1 For definitions of terms used in this specification, refer
values given in parentheses are mathematical conversions to SI
to Terminology C125.
units that are provided for information only and are not
4. Classification
considered standard.
4.1 Two general types of lightweight aggregate are covered
1.4 The following precautionary caveat pertains only to the
by this specification as follows:
test method portion, Section 7, of the specification: This
4.1.1 Group I—Aggregates prepared by expanding products
standard does not purport to address all of the safety concerns,
such as perlite or vermiculite.
if any, associated with its use. It is the responsibility of the user
NOTE 1—These aggregates generally produce concrete having a density
of this standard to establish appropriate safety, health, and
3 3 3 3
from 15 lb/ft to 50 lb/ft (240 kg/m to 800 kg/m ), the thermal
environmental practices and determine the applicability of
2
conductivity of which may be expected to range from 0.45 Btu·in/h·ft to
regulatory limitations prior to use. 2
1.50 Btu·in/h·ft · °F (0.065 W/m·K to 0.22 W/m·K).
1.5 This international standard was developed in accor-
4.1.2 Group II—Aggregates prepared by expanding,
dance with internationally recognized principles on standard-
calcining, or sintering products such as blast-furnace slag, clay,
ization established in the Decision on Principles for the
diatomite, fly ash, shale, or slate; and aggregates prepared by
Development of International Standards, Guides and Recom-
processing natural materials, such as pumice, scoria, or tuff.
mendations issued by the World Trade Organization Technical
NOTE 2—These aggregates generally produce concrete having a density
Barriers to Trade (TBT) Committee.
3 3 3 3
from 45 lb/ft to 90 lb/ft (720 kg/m to 1440 kg/m ), the thermal
2
conductivity of which may be expected to range from 1.05 BTU·in/h·ft ·
2
°F to 3.00 BTU·in/h·ft · °F (0.15 W/m·K to 0.43 W/m·K).
1
This specification is under the jurisdiction of ASTM Committee C09 on
Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee
2
C09.21 on Lightweight Aggregates and Concrete. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 1, 2023. Published June 2023. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1954. Last previous edition approved in 2017 as C332 – 17. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0332-23. 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
1

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...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C332 − 17 C332 − 23
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 U.S. Department of Defense.
1. 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 E11.
1.3.1 With regard to other units of measure, 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.
1.4 The following precautionary caveat pertains only to the test method portion, Section 7, 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 healthsafety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C29/C29M Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate
C125 Terminology Relating to Concrete and Concrete Aggregates
C136/C136M Test Method for Sieve Analysis of Fine and Coarse Aggregates
C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the
Guarded-Hot-Plate Apparatus
D75/D75M Practice for Sampling Aggregates
1
This specification is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee C09.21 on
Lightweight Aggregates and Concrete.
Current edition approved June 15, 2017June 1, 2023. Published July 2017June 2023. Originally approved in 1954. Last previous edition approved in 20092017 as
C332 – 09.C332 – 17. DOI: 10.1520/C0332-17.10.1520/C0332-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM 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
1

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C332 − 23
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this specification, refer to Terminology C125.
4. Classification
4.1 Two general types of lightweight aggregate are covered by this specification as follows:
4.1.1 Group I—Aggregates prepared by expanding products such as perlite or vermiculite.
3 3 3 3
NOTE 1—These aggregates generally produce concrete having a density from 15 lb/ft to 50 lb/ft (240 kg/m to 800 kg/m ), the thermal conductivity
2 2
of which may be expected to range from 0.45 Btu·in/h·ft to 1.50 Btu·in/h·ft ·°F (0.065 · °F (0.065 W/m·K to 0.22 W/m·K).
4.1.2 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.
3 3 3 3
NOTE 2—These agg
...