ASTM C1386-07
(Specification)Standard Specification for Precast Autoclaved Aerated Concrete (AAC) Wall Construction Units (Withdrawn 2013)
Standard Specification for Precast Autoclaved Aerated Concrete (AAC) Wall Construction Units (Withdrawn 2013)
ABSTRACT
This specification covers solid nonload-bearing and load-bearing precast concrete wall units made from autoclaved aerated concrete. Precast autoclaved aerated concrete (AAC) is a cementitious product based on calcium silicate hydrates in which low density is attained by the inclusion of an agent resulting in macroscopic voids and is subjected to high-pressure steam curing. The precast autoclaved aerated concrete wall units are large-size solid rectangular prisms, which are to be laid using thin-bed mortar. Installed units shall be protected against direct exposure to moisture using a coating material. The raw materials used in the production of precast autoclaved aerated concrete are portland cement, quartz sand, water, lime, gypsum or anhydrite, and an agent resulting in macroscopic voids. The quartz sand used as a raw material may be replaced by a siliceous fine aggregate other than sand, and usually is ground to a fine powder before use. Fly ash may be used as a sand replacement. The batched raw materials are mixed thoroughly together to form a slurry. The slurry is cast into steel molds. Due to the chemical reactions that take place within the slurry, the volume expands. After setting, and before hardening, the mass is machine cut into units of various sizes. The units then are steam-cured under pressure in autoclaves where the material is transformed into a hard calcium silicate. The units shall be subjected to the following tests: compressive strength test, moisture content test, bulk density test, and shrinkage test.
SCOPE
1.1 This specification covers solid nonload-bearing and load-bearing precast concrete wall units made from autoclaved aerated concrete. Precast autoclaved aerated concrete (AAC) is a cementitious product based on calcium silicate hydrates in which low density is attained by the inclusion of an agent resulting in macroscopic voids and is subjected to high-pressure steam curing. The precast autoclaved aerated concrete wall units are large-size solid rectangular prisms, which are to be laid using thin-bed mortar. Installed units covered by this specification shall be protected against direct exposure to moisture using a coating material accepted by the AAC manufacturer.
1.2 The raw materials used in the production of precast autoclaved aerated concrete are portland cement, quartz sand, water, lime, gypsum or anhydrite, and an agent resulting in macroscopic voids. The quartz sand used as a raw material may be replaced by a siliceous fine aggregate other than sand, and usually is ground to a fine powder before use. Fly ash may be used as a sand replacement. The batched raw materials are mixed thoroughly together to form a slurry. The slurry is cast into steel molds. Due to the chemical reactions that take place within the slurry, the volume expands. After setting, and before hardening, the mass is machine cut into units of various sizes. The units then are steam-cured under pressure in autoclaves where the material is transformed into a hard calcium silicate.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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. See Section 8, Section 9, and Section 10.
WITHDRAWN RATIONALE
This specification covered solid nonload-bearing and load-bearing precast concrete wall units made from autoclaved aerated concrete. Precast autoclaved aerated concrete (AAC) is a cementitious product based on calcium silicate hydrates in which low density is attained by the inclusion of an agent resulting in macroscopic voids and is subjected to high-pressure steam curing. The precast autoclaved aerated concrete wall units are large-size solid r...
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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:C1386 −07
StandardSpecification for
Precast Autoclaved Aerated Concrete (AAC) Wall
1
Construction Units
This standard is issued under the fixed designation C1386; 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 2. Referenced Documents
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1.1 This specification covers solid nonload-bearing and 2.1 ASTM Standards:
load-bearing precast concrete wall units made from autoclaved C22/C22M Specification for Gypsum
aerated concrete. Precast autoclaved aerated concrete (AAC) is C33 Specification for Concrete Aggregates
a cementitious product based on calcium silicate hydrates in C144 Specification for Aggregate for Masonry Mortar
which low density is attained by the inclusion of an agent C150 Specification for Portland Cement
resulting in macroscopic voids and is subjected to high- C332 Specification for Lightweight Aggregates for Insulat-
pressure steam curing. The precast autoclaved aerated concrete ing Concrete
wall units are large-size solid rectangular prisms, which are to C595 Specification for Blended Hydraulic Cements
be laid using thin-bed mortar. Installed units covered by this C618 Specification for Coal Fly Ash and Raw or Calcined
specification shall be protected against direct exposure to Natural Pozzolan for Use in Concrete
moisture using a coating material accepted by the AAC E4 Practices for Force Verification of Testing Machines
manufacturer.
3. Classification
1.2 The raw materials used in the production of precast
3.1 AAC units manufactured in accordance with this speci-
autoclaved aerated concrete are portland cement, quartz sand,
fication are classified according to their strength class.
water, lime, gypsum or anhydrite, and an agent resulting in
macroscopicvoids.Thequartzsandusedasarawmaterialmay
4. Materials and Manufacture
be replaced by a siliceous fine aggregate other than sand, and
usually is ground to a fine powder before use. Fly ash may be
4.1 Raw Materials—Materials shall conform to the follow-
used as a sand replacement. The batched raw materials are
ing applicable specifications:
mixed thoroughly together to form a slurry. The slurry is cast
4.1.1 Portland Cement, Specification C150.
into steel molds. Due to the chemical reactions that take place
4.1.2 Blended Cements, Specification C595.
within the slurry, the volume expands.After setting, and before
4.1.3 Pozzolan, Specification C618.
hardening, the mass is machine cut into units of various sizes.
4.1.4 Gypsum, Specification C22/C22M.
The units then are steam-cured under pressure in autoclaves
4.1.5 Aggregates, Specifications C33, C144,or C332.
where the material is transformed into a hard calcium silicate.
5. Physical Requirements
1.3 The values stated in inch-pound units are to be regarded
5.1 Compressive Strength—The compressive strength of the
as the standard. The values given in parentheses are for
information only. units shall be determined according to Section 8 and shall
conform to the requirements of Table 1.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5.2 Dry Bulk Density—The dry bulk density shall be deter-
responsibility of the user of this standard to establish appro- mined according to Section 9 and shall conform to the
priate safety and health practices and determine the applica-
requirements of Table 1.
bility of regulatory limitations prior to use. See Section 8,
5.3 Drying Shrinkage—The drying shrinkage shall be deter-
Section 9, and Section 10.
mined in accordance with Section 10, and the average drying
shrinkage shall conform to the requirements of Table 1.
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This specification is under the jurisdiction ofASTM Committee C27 on Precast
Concrete Products and is the direct responsibility of C27.60 on Precast Autoclaved
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Aerated Concrete. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2007. Published April 2007. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1998. Last previous edition approved in 1998 as C1386 – 98. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C1386-07. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1386−07
TABLE 1 Physical Requirements
8.3.2 Speed of Testing—Apply the load up to one half of the
Average expected maximum load at a convenient rate, after which
Compressive Nominal Dry
3
Strength Density Limits, lb/ft Drying
a
...
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