ASTM C332-23
(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 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
- Technical Committee
- C09 - Concrete and Concrete Aggregates
- Drafting Committee
- C09.21 - Lightweight Aggregates and Concrete
Relations
- Refers
ASTM C29/C29M-23 - Standard Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate - Effective Date
- 01-Oct-2023
- Effective Date
- 15-Dec-2019
- Effective Date
- 01-Nov-2019
- Effective Date
- 01-Jan-2019
- Effective Date
- 01-Oct-2018
- Effective Date
- 01-Jul-2018
- Effective Date
- 01-Jan-2018
- Effective Date
- 01-Jan-2017
- Effective Date
- 15-Dec-2016
- Effective Date
- 01-Feb-2016
- Effective Date
- 15-Dec-2015
- Effective Date
- 01-Jul-2015
- Effective Date
- 01-Feb-2015
- Effective Date
- 01-Aug-2014
- Effective Date
- 15-Dec-2013
Overview
ASTM C332-23: Standard Specification for Lightweight Aggregates for Insulating Concrete is a critical international standard developed by ASTM International. This specification outlines requirements for lightweight aggregates intended for use in insulating concrete not exposed to the weather, optimizing the thermal insulating properties of concrete for energy efficiency and specialized construction needs. The standard classifies two main types of lightweight aggregates-those made from expanded products such as perlite or vermiculite, and those derived from expanded, calcined, or sintered materials like slag, clay, shale, fly ash, or natural volcanic materials like pumice and tuff.
Key Topics
- Thermal Insulating Properties: The primary focus of ASTM C332-23 is to ensure that concrete produced with these lightweight aggregates meets specific standards for low thermal conductivity, aiding in insulation performance for building envelopes or specialized construction projects.
- Aggregate Classification:
- Group I Aggregates: Include expanded materials such as perlite and vermiculite.
- Group II Aggregates: Include expanded or processed minerals such as blast-furnace slag, clay, diatomite, fly ash, shale, slate, pumice, scoria, or tuff.
- Physical and Mechanical Properties: The standard covers requirements for bulk density, gradation (particle size distribution), and consistency across shipments to guarantee uniform performance.
- Testing and Quality Assurance: Specifies detailed procedures for sampling, grading, determining fineness modulus, bulk density, specimen preparation, and methods to assess concrete density and thermal conductivity.
- Packaging and Marking: Requirements for clear labeling of packages, including manufacturer, type of aggregate, and quantity (mass and approximate volume).
Applications
ASTM C332-23 is widely used in the construction industry, particularly where insulating concrete is required for non-weather-exposed environments. Common practical applications include:
- Roof Decks and Floor Systems: Lightweight aggregates help create thermally efficient roof and floor assemblies in commercial, institutional, or residential buildings, reducing heat transfer and improving energy efficiency.
- Precast Concrete Products: Used in the manufacturing of lightweight, insulating precast units for interior applications.
- Industrial Insulation: Appropriate for specialized concrete used in industrial facilities where temperature control is paramount but the concrete is protected from weather.
- Fire Protection: Some insulating concretes offer enhanced fire-resistant properties due to their composition and lightweight aggregates.
By specifying the performance and testing requirements for lightweight insulating aggregates, ASTM C332-23 ensures reliable and consistent results, supporting both project safety and efficiency.
Related Standards
When applying ASTM C332-23, related ASTM standards include:
- ASTM C29/C29M: Test Method for Bulk Density ("Unit Weight") and Voids in Aggregate
- ASTM C125: Terminology Relating to Concrete and Concrete Aggregates
- ASTM C136/C136M: Test Method for Sieve Analysis of Fine and Coarse Aggregates
- ASTM C177: Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties
- ASTM D75/D75M: Practice for Sampling Aggregates
- ASTM E11: Specification for Wire Cloth and Sieves for Testing Purposes
These referenced documents provide the foundational procedures for sampling, testing, and terminology essential for the full and correct use of ASTM C332-23.
Keywords: ASTM C332, lightweight aggregate, insulating concrete, thermal insulation, bulk density, concrete aggregates, energy efficient building materials.
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Frequently Asked Questions
ASTM C332-23 is a technical specification published by ASTM International. Its full title is "Standard Specification for Lightweight Aggregates for Insulating Concrete". This standard covers: 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.
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.
ASTM C332-23 is classified under the following ICS (International Classification for Standards) categories: 91.100.30 - Concrete and concrete products. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM C332-23 has the following relationships with other standards: It is inter standard links to ASTM C29/C29M-23, ASTM C125-19a, ASTM D75/D75M-19, ASTM C125-19, ASTM C125-18b, ASTM C125-18a, ASTM C125-18, ASTM C29/C29M-17, ASTM C125-16, ASTM C29/C29M-16, ASTM C125-15b, ASTM C125-15a, ASTM C125-15, ASTM C125-14, ASTM C125-13b. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM C332-23 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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
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
2.1 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
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
conductivity of which may be expected to range from 1.05 BTU·in/h·ft ·
°F to 3.00 BTU·in/h·ft · °F (0.15 W/m·K to 0.43 W/m·K).
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. 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 service@astm.org. 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
C332 − 23
TABLE 2 Bulk Density Requirement for Lightweight Aggregates
4.2 The aggregate shall be composed predominantly of
of Insulating Concrete
lightweight cellular and granular inorganic material.
Dry Loose Bulk Density
3 3
lb/ft (kg/m )
Size Designation
5. Physical Properties
Min Max
5.1 Insulating Properties—The thermal insulating proper-
Group I:
ties of concrete made from the lightweight aggregate under test
Perlite 7.5 (120) 12 (196)
Vermiculite 5.5 (88) 10 (160)
shall conform to the following limits:
Group II:
Maximum Average 28-Day Maximum Average
Fine aggregate . 70 (1120)
Oven-Dry Thermal Conductivity,
Coarse aggregate . 55 (880)
3 2
Bulk Density, lb/ft Btu·in/h·ft ·°F
Combined fine and coarse . 65 (1040)
(kg/m ) (W/m·K)
aggregate
50 (800) 1.50 (0.22)
90 (1440) 3.00 (0.43)
5.2 Grading—The grading shall conform to the require-
ments shown in Table 1.
5.2.1 Uniformity of Grading—To ensure reasonable unifor-
6.1.2 Grading—Method C136/C136M, except that when a
mity in the gradation of successive shipments of lightweight
mechanical sieving device is used, the sieving time shall be 5
aggregates, fineness modulus determination shall be made
min 6 0.1 min and the following modification shall apply:
periodically. If the fineness modulus of the aggregate differs by
6.1.2.1 Fine aggregate—The mass of the test sample shall
more than 7 % from that of the sample submitted for
be in accordance with the following table:
acceptance, the aggregate is subject to rejection, unless the
supplier demonstrates that it will produce concrete of the Nominal Density Mass of Test
3 3
lb/ft (kg ⁄m ) Sample, g
required characteristics.
5 to 15 (80 to 240) 50
5.3 Loose Bulk Density (Test Method C29/C29M)—The dry
15 to 25 (240 to 400) 100
loose bulk density of lightweight aggregates shall conform to
25 to 35 (400 to 560) 150
the requirements shown in Table 2.
35 to 45 (560 to 720) 200
45 to 55 (720 to 880) 250
5.3.1 Uniformity of Loose Bulk Density—The dry loose bulk
55 to 65 (880 to 1040) 300
density of successive shipments of lightweight aggregates shall
65 to 70 (1040 to 1120) 350
not differ by more than 10 % from that of the sample submitted
6.1.2.2 Coarse Aggregate—The sample shall be not less
for acceptance.
3 3
than 0.1 ft (2830 cm ) of the material obtained in making the
bulk density determination.
6. Sampling and Testing for Aggregate Properties
6.1.3 Loose Bulk Density—
...
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
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
2.1 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
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.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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
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 aggregates generally produce concrete having a density from 45 lb/ft to 90 lb/ft (720 kg/m to 1440 kg/m ), the thermal conductivity
2 2
of which may be expected to range from 1.05 BTU·in/h·ft · °F to 3.00 BTU·in/h·ft · °F (0.15 W/m·K to 0.43 W/m·K).
4.2 The aggregate shall be composed predominantly of lightweight cellular and granular inorganic material.
5. Physical Properties
5.1 Insulating Properties—The thermal insulating properties of concrete made from the lightweight aggregate under test shall
conform to the following limits:
Maximum Average 28-Day Maximum Average
Oven-Dry Thermal Conductivity,
3 2
Bulk Density, lb/ft Btu·in/h·ft ·°F
(kg/m ) (W/m·K)
50 (800) 1.50 (0.22)
90 (1440) 3.00 (0.43)
5.2 Grading—The grading shall conform to the requirements shown in Table 1.
5.2.1 Uniformity of Grading—To ensure reasonable uniformity in the gradation of successive shipments of lightweight aggregates,
fineness modulus determination shall be made periodically. If the fineness modulus of the aggregate differs by more than 7 % from
that of the sample submitted for acceptance, the aggregate is subject to rejection, unless the supplier demonstrates that it will
produce concrete of the required characteristics.
5.3 Loose Bulk Density (Test Method C29/C29M)—The dry loose bulk density of lightweight aggregates shall conform to the
requirements shown in Table 2.
5.3.1 Uniformity of Loose Bulk Density—The dry loose bulk density of successive shipments of lightweight aggregates shall not
differ by more than 10 % from that of the sample submitted for acceptance.
6. Sampling and Testing for Aggregate Properties
6.1 Sample lightweight aggregates and determine the properties enumerated in this specification in accordance with the following
methods:
6.1.1 Sampling—Practice D75/D75M, except sample bagged materials by riffling and then quartering.
C332 − 23
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 20 to 60 5 to 25 0 to 10
A
Vermiculite (Coarse) . . 100 98 to 100 60 to 100 30 to 85 2 to 45 1 to 20 0 to 10
Vermiculite (Fine) . . . . 100 85 to 100 35 to 85 2 to 40 0 to 10
Group II
Fine aggregate: . . 100 85 to 100 . 40 to 80 . 10 to 35 5 to 25
4.75-mm (No. 4) to 0
Coarse
...
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