ASTM C1691-11(2017)

Standard Specification for Unreinforced Autoclaved Aerated Concrete (AAC) Masonry Units

SCOPE
1.1 This specification covers solid, unreinforced masonry units manufactured from autoclaved aerated concrete (AAC), a cementitious product. This specification addresses dimensional tolerances, maximum limits for drying shrinkage, and shipping and handling.  
1.2 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.  
1.3 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.  
1.4 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: Historical
• Publication Date: 30-Nov-2017
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C15 - Masonry – Manufactured Masonry Units, Mortars and Grouts
• Drafting Committee: C15.10 - Autoclaved Aerated Concrete Masonry Units

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C1691 −11 (Reapproved 2017)
Standard Specification for
Unreinforced Autoclaved Aerated Concrete (AAC) Masonry
Units
This standard is issued under the fixed designation C1691; 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.
1. Scope 4. Classification
1.1 This specification covers solid, unreinforced masonry
4.1 AAC masonry units manufactured in accordance with
units manufactured from autoclaved aerated concrete (AAC), a
this specification shall be classified according to their strength
cementitious product. This specification addresses dimensional
class.
tolerances, maximum limits for drying shrinkage, and shipping
and handling.
5. Materials and Manufacture
1.2 The values stated in inch-pound units are to be regarded
5.1 AAC masonry units manufactured in accordance with
as standard. The values given in parentheses are mathematical
this specification shall be composed entirely of AAC material
conversions to SI units that are provided for information only
conforming to Specification C1693.
and are not considered standard.
1.3 This standard does not purport to address all of the
6. Physical Requirements
safety concerns, if any, associated with its use. It is the
6.1 Compressive Strength—The compressive strength of the
responsibility of the user of this standard to establish appro-
units shall be determined according to Specification C1693 and
priate safety, health, and environmental practices and deter-
shall conform to the requirements of Specification C1693 for
mine the applicability of regulatory limitations prior to use.
the strength class in which the units are classified.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
6.2 Dry Bulk Density—The dry bulk density shall be deter-
ization established in the Decision on Principles for the
mined according to Specification C1693 and shall conform to
Development of International Standards, Guides and Recom-
the requirements of Specification C1693 for the strength class
mendations issued by the World Trade Organization Technical
in which the units are classified.
Barriers to Trade (TBT) Committee.
6.3 Drying Shrinkage—The drying shrinkage shall be deter-
2. Referenced Documents
mined in accordance with Specification C1693 and shall
conform to the requirements of Specification C1693 for the
2.1 ASTM Standards:
strength class in which the units are specified.
C1232 Terminology for Masonry
C1693 Specification for Autoclaved Aerated Concrete
7. Dimensions and Permissible Variations
(AAC)
7.1 The specified dimensions of the units shall be estab-
3. Terminology
lished by the AAC unit manufacturer.
3.1 Definitions—Terms defined in Terminology C1232 shall
7.2 No overall unit dimension (width, height, or length)
apply in this specification.
shall differ by more than ⁄8 in. (3 mm) from the corresponding
specified dimension
This specification is under the jurisdiction of ASTM Committee C15 on
8. Visual Inspection
Manufactured Masonry Units and is the direct responsibility of Subcommittee
C15.10 on Autoclaved Aerated Concrete Masonry Units.
8.1 All units shall be so
...

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: C1691 − 11 C1691 − 11 (Reapproved 2017)
Standard Specification for
Unreinforced Autoclaved Aerated Concrete (AAC) Masonry
Units
This standard is issued under the fixed designation C1691; 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.
1. Scope*Scope
1.1 This specification covers solid, unreinforced masonry units manufactured from autoclaved aerated concrete (AAC), a
cementitious product. This specification addresses dimensional tolerances, maximum limits for drying shrinkage, and shipping and
handling.
1.2 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.
1.3 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 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:
C1232 Terminology for Masonry
C1693 Specification for Autoclaved Aerated Concrete (AAC)
3. Terminology
3.1 Definitions—Terms defined in Terminology C1232 shall apply in this specification.
4. Classification
4.1 AAC masonry units manufactured in accordance with this specification shall be classified according to their strength class.
5. Materials and Manufacture
5.1 AAC masonry units manufactured in accordance with this specification shall be composed entirely of AAC material
conforming to Specification C1693.
6. Physical Requirements
6.1 Compressive Strength—The compressive strength of the units shall be determined according to Specification C1693 and
shall conform to the requirements of Specification C1693 for the strength class in which the units are classified.
6.2 Dry Bulk Density—The dry bulk density shall be determined according to Specification C1693 and shall conform to the
requirements of Specification C1693 for the strength class in which the units are classified.
6.3 Drying Shrinkage—The drying shrinkage shall be determined in accordance with Specification C1693 and shall conform to
the requirements of Specification C1693 for the strength class in which the units are specified.
This specification is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.10 on
Autoclaved Aerated Concrete Masonry Units.
Current edition approved Dec. 1, 2011Dec. 1, 2017. Published December 2011January 2018. Originally approved in 2009. Last previous edition approved in 20092011
as C1391 – 09.C1391 – 11. DOI: 10.1520/C1691-11.10.1520/C1691-11R17.
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, re
...