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ASTM C1452-00(2006)

(Specification)

Standard Specification for Reinforced Autoclaved Aerated Concrete Elements (Withdrawn 2013)

Standard Specification for Reinforced Autoclaved Aerated Concrete Elements (Withdrawn 2013)

ABSTRACT
This specification covers load-bearing and nonload-bearing reinforced autoclaved aerated concrete (AAC) floor, roof, wall, and stair elements used as components for building construction. Installed units covered by this specification shall be protected against direct exposure to moisture using a coating material accepted by the AAC manufacturer. Concrete elements available here are grouped into three classes (AAC-2, AAC-4, and AAC-6) according to strength. Raw materials (quicklime, aggregate, Portland cement, blended cements, gypsum, pozzolan, and gas-producing agents) and steel reinforcing wires shall conform to properties as specified. Concrete elements shall be tested and adhere accordingly to physical requirements as to compressive strength, nominal dry bulk density, drying shrinkage, maximum area of corrosion and corrosion protection effectiveness, yield strength, tensile strength, reduction of area, and weld-point shear strength.
SCOPE
1.1 This specification covers load-bearing and nonload-bearing reinforced autoclaved aerated concrete (AAC) floor, roof, wall, and stair elements used as components for building construction. Autoclaved aerated concrete is a cementitous 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. 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 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 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 with high accuracy into elements of various sizes. The elements then are steam-cured under pressure in autoclaves where the matrix is transformed into a solid calcium silicate hydrate.Note 1
LOI up to 12 % may be acceptable for production of AAC provided supporting test data is presented by the manufacturer.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only.
WITHDRAWN RATIONALE
This specification covered load-bearing and nonload-bearing reinforced autoclaved aerated concrete (AAC) floor, roof, wall, and stair elements used as components for building construction. Autoclaved aerated concrete is a cementitous 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. Installed units covered by this specification shall be protected against direct exposure to moisture using a coating material accepted by the AAC manufacturer.
Formerly under the jurisdiction of Committee C27 on Precast Concrete Products, this specification was withdrawn in November 2013. This standard is being withdrawn without replacement due to its limited use by industry.

General Information

Status
Withdrawn
Publication Date
31-May-2006
Withdrawal Date
03-Nov-2013
ICS
91.100.30 - Concrete and concrete products
Technical Committee
C27 - Precast Concrete Products
Drafting Committee
C27.60 - Precast Autoclaved Aerated Concrete
Current Stage
Ref Project

Relations

Replaces
ASTM C1452-00 - Standard Specification for Reinforced Autoclaved Aerated Concrete Elements
Effective Date
01-Jun-2006
Referred By
ASTM C1660-10(2018) - Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry
Effective Date
01-Jun-2006

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ASTM C1452-00(2006) - Standard Specification for Reinforced Autoclaved Aerated Concrete Elements (Withdrawn 2013)ASTM C1452-00(2006) - Standard Specification for Reinforced Autoclaved Aerated Concrete Elements (Withdrawn 2013)
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ASTM C1452-00(2006) - Standard Specification for Reinforced Autoclaved Aerated Concrete Elements (Withdrawn 2013)
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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:C1452 −00(Reapproved 2006)
Standard Specification for
Reinforced Autoclaved Aerated Concrete Elements
This standard is issued under the fixed designation C1452; 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 A82/A82M Specification for Steel Wire, Plain, for Concrete
Reinforcement
1.1 This specification covers load-bearing and nonload-
C22/C22M Specification for Gypsum
bearing reinforced autoclaved aerated concrete (AAC) floor,
C33 Specification for Concrete Aggregates
roof, wall, and stair elements used as components for building
C144 Specification for Aggregate for Masonry Mortar
construction. Autoclaved aerated concrete is a cementitous
C150 Specification for Portland Cement
product based on calcium silicate hydrates in which low
C332 Specification for Lightweight Aggregates for Insulat-
density is attained by the inclusion of an agent resulting in
ing Concrete
macroscopic voids and is subjected to high-pressure steam
C595 Specification for Blended Hydraulic Cements
curing. Installed units covered by this specification shall be
C618 Specification for Coal Fly Ash and Raw or Calcined
protected against direct exposure to moisture using a coating
Natural Pozzolan for Use in Concrete
material accepted by the AAC manufacturer.
C1386 Specification for Precast Autoclaved Aerated Con-
1.2 The raw materials used in the production of autoclaved
crete (AAC) Wall Construction Units
aerated concrete are portland cement, quartz sand, water, lime,
gypsum or anhydrite, and an agent resulting in macroscopic
3. Classification
voids. The quartz sand used as a raw material may be replaced
3.1 Autoclaved aerated concrete elements manufactured in
by a siliceous fine aggregate other than sand and usually is
accordance with this specification are classified according to
ground to a fine powder before use. Fly ash may be used as a
their strength class as shown in Table 1.
sand replacement. The batched raw materials are mixed to-
gether to form a slurry. The slurry is cast into steel molds. Due
4. Materials and Manufacture
to the chemical reactions that take place within the slurry, the
4.1 Raw Materials— Materials shall conform to the follow-
volume expands.After setting, and before hardening, the mass
ing specifications:
is machine cut with high accuracy into elements of various
sizes. The elements then are steam-cured under pressure in 4.1.1 Quicklime, in accordance with manufacturer’s speci-
fication.
autoclaveswherethematrixistransformedintoasolidcalcium
silicate hydrate. 4.1.2 Aggregate, in accordance with Specification C33,
NOTE 1—LOI up to 12 % may be acceptable for production of AAC C144,or C332.
provided supporting test data is presented by the manufacturer.
4.1.3 Portland Cement, in accordance with Specification
C150.
1.3 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are provided 4.1.4 Blended Cements, in accordance with Specification
C595.
for information only.
4.1.5 Gypsum, in accordance with Specification C22/C22M.
4.1.6 Pozzolan, in accordance with Specification C618.
2. Referenced Documents
2 4.1.7 Gas-producing agent conforming to the manufactur-
2.1 ASTM Standards:
er’s specification.
4.2 Steel Reinforcing—Steel reinforcing shall conform to
the following specification and the requirements of Table 2.
This specification is under the jurisdiction ofASTM CommitteeC27 on Precast
Concrete Products and is the direct responsibility of Subcommittee C27.60 on 4.2.1 Steel Wire, in accordance with Specification A82/
Precast Autoclaved Aerated Concrete.
A82M.
Current edition approved June 1, 2006. Published June 2006. Originally
approved in 2000. Last previous edition approved in 2000 as C1452 – 00. DOI:
5. Physical Requirements
10.1520/C1452-00R06.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 Compressive Strength—The compressive strength of the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
AAC material shall be determined according to Specification
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. C1386 and shall conform to the requirements of Table 1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C1452−00 (2006)
TABLE 1 Physical Requirements
Strength Minimum Compressive Strength of AAC, Nominal Dry Bulk Density Limits, Average Drying Maximum Area of
3 3 A
Class psi (MPa) Density, lb/ft (kg/m ) Shrinkage Steel Corrosion
3 3
(%)
lb/ft (kg/m ) (%)
Average Min
AAC-2 360 (2.5) 290 (2.0) 25 (400) 22 (350)—28 (450)
31 (500) 28 (450)—34 (550)
AAC-4 725 (5.0) 580 (4.0) 31 (500) 28 (450)—34 (550)
37 (600) 34 (550)—41 (650)
# 0.02 # 5.0
44 (700) 41 (650)—47 (750)
AAC-6 1090 (7.5) 870 (6.0) 37 (600) 35 (550)—41 (650)
44 (700) 41 (650)—47 (750)
50 (800) 47 (750)—53 (850)
A
As determined according to Section 7, indicated by a slight trace of rust on the surface of the steel. No flaking or deep rust should be evident on the steel surface.
TABLE 2 Properties of Steel Reinforcement
5.8 The load-bearing capacity of the reinforced AAC ele-
Property Minimum Characteristic Value ments shall be determined using the test method in Section 9,
Yield strength, min, ksi (MPa) 70 (485) or by calculation provided adequate test data are available for
Tensile strength, min, ksi, (MPa) 80 (550)
verification of the calculation method.
A
Reduction of area, min, % 30
A
For material testing over 100 ksi (690 MPa) tensile strength, the reduction of area
6. Dimensions and Permissible Variations
shall be not less than 25 %.
6.1 The dimensions of the reinforced elements shall be as
specified by the AAC manufacturer. The allowable deviations
for the element dimensions shall be as specified in Table 4.
5.2 BulkDensity—Thedrybulkdensityshallbedetermined
according to Specification C1386 and shall conform to the
7. Corrosion Protection of Steel Reinforcement in AAC
requirements of Table 1.
7.1 Apparatus:
5.3 Shrinkage—The drying shrinkage of the AAC material
7.1.1 Storage Container, with dimensions sufficient to com-
shall be determined according to Specification C1386 and shall
pletely immerse AAC specimens.
conform to the requirements of Table 1.
7.2 Test Specimens:
5.4 Weld-Point Shear Strength—The weld-point shear
7.2.1 Atest set shall consist of six test specimens having the
strengthinthereinforcementshallbedeterminedinaccordance
dimensions16in.(400mm)bywidthofthereinforcedelement
with Section 8 and shall conform to the requirements of Table
by thickness of the reinforced element. The exposed surface
3.
areasofthesteelreinforcementateachendofthetestspecimen
shall be coated with the corrosion-protection compound and
5.5 Concrete Cover of Steel Reinforcement —The minimum
allowed to dry before testing. Three specimens are to be kept
concrete cover over the steel reinforcement shall be 0.375 in.
as reference specimens, and three specimens shall be tested.
(10 mm). The reinforcing steel shall receive a rust-resistant
coating before casting.
7.3 Procedure:
7.3.1 Reference Specimens—The reference specimens are
5.6 Effectiveness of Corrosion Protection of Steel
stored in a room having a temperature of 59–68°F (15–20°C)
Reinforcement—The effectiveness of the corrosion protection
and a relative humidity of 50 to 70 %.
for the steel reinforcement shall be determined according to
7.3.2 Test Specimens— The test specimens are immersed in
Section 7 and shall conform to the requirements of Table 1.
an aqueous sodium chloride solution, 3 % NaCl by mass, for
5.7 Steel Reinforcement—The properties of the steel rein-
periods of2hat intervals of three days. This is repeated for a
forcementshallbedeterminedinaccordancewithSpecification
total of ten test cycles. When the specimens are not immersed
A82/A82M and shall conform to the requirements of Table 2.
in the sodium chloride solution, they are stored under the same
conditions as the reference specimens.After completion of the
TABLE 3 Weld-Point Shear Strength ten testing cycles the specimens are allowed to air dry for 4 h.
7.3.3 Inspection for Rust—After completion of the testing
Diameter of the Longitudinal Minimum Shear Strength of the Joint,
Reinforcement, in. (mm) lbf (kN) procedure the autoclaved aerated concrete around the steel
0.16 (4.0) 495 (2.20)
reinforcing is removed from both the reference and the test
0.18 (4.5) 598 (2.66)
0.20 (5.0) 771 (3.43)
0.24 (6.0) 1113 (4.95)
TABLE 4 Dimensional Tolerances for AAC Reinforced Elements
0.28 (7.0) 1513 (6.73)
0.32 (8.0) 1987 (8.84) Dimension Floor, Roof, and Wall Panels
0.35 (9.0) 2502 (11.13) Length ± 0.20 in. (± 5 mm)
0.40 (10.0) 3091 (13.75) Width ± 0.12 in. (± 3 mm)
0.43 (11.0) 3741 (16.64) Thickness ± 0.12 in. (± 3 mm)
0.47 (12.0) 5339 (19.79) Tongue/groove alignment ± 0.12 in. (± 3 mm
...

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