ASTM C1691-11
(Specification)Standard Specification for Unreinforced Autoclaved Aerated Concrete (AAC) Masonry Units
Standard Specification for Unreinforced Autoclaved Aerated Concrete (AAC) Masonry Units
ABSTRACT
This specification addresses the dimensional tolerances, maximum limits for drying shrinkage, and shipping and handling requirements for solid unreinforced masonry units manufactured from autoclaved aerated concrete (AAC). The masonry units shall be composed entirely of AAC material and classified according to their strength class. The units shall conform to compressive strength, dry bulk density, and drying shrinkage requirements, which shall be determined in accordance with referenced ASTM documents.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:C1691 −11
Standard Specification for
Unreinforced Autoclaved Aerated Concrete (AAC) Masonry
1
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* 5. Materials and Manufacture
5.1 AAC masonry units manufactured in accordance with
1.1 This specification covers solid, unreinforced masonry
this specification shall be composed entirely of AAC material
units manufactured from autoclaved aerated concrete (AAC), a
conforming to Specification C1693.
cementitious product. This specification addresses dimensional
tolerances, maximum limits for drying shrinkage, and shipping
6. Physical Requirements
and handling.
6.1 Compressive Strength—The compressive strength of the
1.2 The values stated in inch-pound units are to be regarded
units shall be determined according to Specification C1693 and
as standard. The values given in parentheses are mathematical
shall conform to the requirements of Specification C1693 for
conversions to SI units that are provided for information only
the strength class in which the units are classified.
and are not considered standard.
6.2 Dry Bulk Density—The dry bulk density shall be deter-
1.3 This standard does not purport to address all of the
mined according to Specification C1693 and shall conform to
safety concerns, if any, associated with its use. It is the
the requirements of Specification C1693 for the strength class
responsibility of the user of this standard to establish appro-
in which the units are classified.
priate safety and health practices and determine the applica-
6.3 Drying Shrinkage—The drying shrinkage shall be deter-
bility of regulatory limitations prior to use.
mined in accordance with Specification C1693 and shall
conform to the requirements of Specification C1693 for the
2. Referenced Documents
strength class in which the units are specified.
2
2.1 ASTM Standards:
7. Dimensions and Permissible Variations
C1232 Terminology of Masonry
C1693 Specification for Autoclaved Aerated Concrete
7.1 The specified dimensions of the units shall be estab-
(AAC)
lished by the AAC unit manufacturer.
7.2 No overall unit dimension (width, height, or length)
3. Terminology
1
shall differ by more than ⁄8 in. (3 mm) from the corresponding
3.1 Definitions—Terms defined in Terminology C1232 shall
specified dimension
apply in this specification.
8. Visual Inspection
4. Classification
8.1 All units shall be sound and free of defects that would
interfere with the proper placing of the unit or impair the
4.1 AAC masonry units manufactured in accordance with
strength or permanence of the construction. Minor imperfec-
this specification shall be classified according to their strength
tions incidental to the usual methods of manufacture, or
class.
resulting from customary methods of handling in shipment and
delivery, shall not be deemed grounds for rejection.
1 9. Sampling and Testing
This specification is under the jurisdiction of ASTM Committee C15 on
Manufactured Masonry Units and is the direct responsibility of Subcommittee
9.1 The purchaser or the authorized representative shall be
C15.10 on Auto
...
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:C1691–09 Designation: C1691 – 11
Standard Specification for
Unreinforced Autoclaved Aerated Concrete (AAC) Masonry
1
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*
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C1232 Terminology of Masonry
C1693 Specification for Autoclaved Aerated Concrete (AAC)
3. Terminology
3.1 Definitions—Terms defined in Terminology C1232 shall apply in this practice.
3.2Definitions of Terms Specific to This Standard:
3.2.1 autoclaved aerated concrete (AAC), n—low-density cementitious product of calcium silicate hydrates in which the low
density is obtained by the formation of macroscopic air bubbles, mainly by chemical reactions within the mass during the liquid
or plastic phase. The air bubbles are uniformly distributed and are retained in the matrix on setting, hardening, and subsequent
high-pressure steam curing, to produce a cellular structure. Material specifications for this product are prescribed in Specification
C1693. 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 —The
compressive strength of the units shall be determined according to Specification C1693 and shall conform to the requirements of
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 —The dry bulk density shall be
determined according to Specification C1693 and shall conform to the requirements of Specification C1693 and shall conform to
1
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 July 1, 2009. Published November 2009. DOI: 10.1520/C1691-09.
Current edition approved Dec. 1, 2011. Published December 2011. Originally approved in 2009. Last previous edition approved in 2009 as C1391 – 09. DOI:
10.1520/C1691-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
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C1691 – 11
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 C1693and shall conform to
the requirements of Specification C1693for the strength class in which the units are specified.
7. Dimensions and Permissible Variations
7.1 The specified dimensions of the units shall be established by the AAC unit manufacturer.
1
7.2 No overall unit dimension (width, height, or length) shall differ by more than ⁄8 in. (3 mm) fro
...
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