ASTM C796-04
(Test Method)Standard Test Method for Foaming Agents for Use in Producing Cellular Concrete Using Preformed Foam
Standard Test Method for Foaming Agents for Use in Producing Cellular Concrete Using Preformed Foam
SIGNIFICANCE AND USE
This test method is used to develop data for comparison or compliance with the requirements of Specification C 869.
SCOPE
1.1 This test method furnishes a way of measuring, in the laboratory, the performance of a foaming chemical to be used in producing foam (air cells) for making cellular concrete.
1.2 This test method includes the following:
1.2.1 Manufacture of laboratory quantities of cellular concrete.
1.2.2 Determination of the air content of the freshly prepared cellular concrete and of the hardened concrete after handling in conventional machinery.
1.2.3 Determination of the following properties of the hardened concrete: compressive strength, tensile splitting strength, density, and water absorption. It may not be necessary to study all of the above properties in all cases, depending on the proposed use of the material.
1.3 The values stated in inch-pound units are to be regarded as the standard.
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.
1.4 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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:C796–04
Standard Test Method for
Foaming Agents for Use in Producing Cellular Concrete
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Using Preformed Foam
This standard is issued under the fixed designation C796; 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 Department of Defense.
1. Scope C192/C192M Practice for Making and Curing Concrete
Test Specimens in the Laboratory
1.1 This test method furnishes a way of measuring, in the
C495 Test Method for Compressive Strength of Light-
laboratory, the performance of a foaming chemical to be used
weight Insulating Concrete
in producing foam (air cells) for making cellular concrete.
C496/C496M Test Method for Splitting Tensile Strength of
1.2 This test method includes the following:
Cylindrical Concrete Specimens
1.2.1 Manufacture of laboratory quantities of cellular con-
C511 Specification for Mixing Rooms, Moist Cabinets,
crete.
Moist Rooms, and Water Storage Tanks Used in the
1.2.2 Determination of the air content of the freshly pre-
Testing of Hydraulic Cements and Concretes
pared cellular concrete and of the hardened concrete after
C802 Practice for Conducting an Interlaboratory Test Pro-
handling in conventional machinery.
gram to Determine the Precision of Test Methods for
1.2.3 Determination of the following properties of the
Construction Materials
hardened concrete: compressive strength, tensile splitting
C869 Specification for Foaming Agents Used in Making
strength,density,andwaterabsorption.Itmaynotbenecessary
Preformed Foam for Cellular Concrete
to study all of the above properties in all cases, depending on
the proposed use of the material.
3. Terminology
1.3 The values stated in inch-pound units are to be regarded
3.1 Definitions:
as the standard.
3.1.1 cellular concrete—a lightweight product consisting of
1.4 This standard does not purport to address all of the
portland cement, cement-silica, cement-pozzolan, lime-
safety concerns, if any, associated with its use. It is the
pozzolan, or lime-silica pastes, or pastes containing blends of
responsibility of the user of this standard to establish appro-
these ingredients and having a homogeneous void or cell
priate safety and health practices and determine the applica-
structure, attained with gas-forming chemicals or foaming
bility of regulatory limitations prior to use.
agents (for cellular concretes containing binder ingredients
1.5 The text of this standard references notes and footnotes
other than, or in addition to portland cement, autoclave curing
which provide explanatory material. These notes and footnotes
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is usually employed). In cellular concrete the density control
(excluding those in tables and figures) shall not be considered
is achieved by substituting macroscopic air cells for all or part
as requirements of the standard.
of the fine aggregate. Normal-weight coarse aggregate is
2. Referenced Documents usually not used but lightweight aggregates, both fine and
2
coarse, are often utilized in cellular concrete.
2.1 ASTM Standards:
3.2 Symbols:
C88 Test Method for Soundness of Aggregates by Use of
Sodium Sulfate or Magnesium Sulfate
C150 Specification for Portland Cement
D = experimental density of the concrete before
ex1
3 3
pumping, lb/ft (kg/m )
D = experimental density of the concrete after pump-
ex2
1
3 3
This test method is under the jurisdiction of ASTM Committee C09 on
ing, lb/ft (kg/m )
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
D = theoretical density of the plastic mix based on
th
C09.23 on Chemical Admixtures.
3 3
absolute volume, lb/ft (kg/m )
Current edition approved Nov. 1, 2004. Published November 2004. Originally
3 3
approved in 1974. Last previous edition approved in 1997 as C796 – 97. DOI: D = design density of the text mixture, lb/ft (kg/m )
d
10.1520/C0796-04.
2
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
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Standards volume information, refer to the standard’s Document Summary page on ACI Committee 116, “Cement and ConcreteTerminology,”American Concrete
the ASTM website. Institute, Publication SP-19, 1967, p. 144.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C796–04
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6.6 Strike-Off Plate for Molds—A ⁄4-in. (6-mm) thick, flat
SGC = specific gravity of cement = 3.15
steel plate at least 8 in. (200 mm) longer and 2 in. (50 mm)
T = time required to overfill the container, min
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