ASTM C317/C317M-00

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Designation: C 317/C 317M – 00
Standard Specification for
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Gypsum Concrete
This standard is issued under the fixed designation C 317/C 317M; 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 (ϵ) 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* 4.3 Aggregates—Specification C 35C35.
4.4 Wood Chips or Wood Shavings, shall be dry wood,
1.1 This specification covers mill-mixed gypsum concrete,
uniform and clean in appearance, passing a 1-in. [25-mm]
consisting essentially of calcined gypsum and suitable aggre-
1
sieve, and not more than ⁄16 in. [1.5 mm] thick.
gate, requiring the addition of water only at the job site.
Gypsum concrete is intended for use in the construction of
5. Physical Properties
poured-in-place roof decks or slabs. Two classes, based on the
5.1 Setting Time—Gypsum concrete shall set in not less
compressive strength and density, are covered.
than 20 min and not more than 90 min.
1.2 The values stated in either inch-pound units or SI units
5.2 Compressive Strength—Gypsum concrete shall have the
are to be regarded separately as standard. The values stated in
following compressive strength for the respective classes:
each system may not be exact equivalents; therefore, each
Class Compressive Strength, min,
system shall be used independently of the other. Combining
psi [MPa]
values from the two systems may result in nonconformance
A 500 [3.5]
with the standard. B 1000 [7.0]
2. Referenced Documents
5.3 Density—Gypsum concrete, Class A, shall have a den-
2.1 ASTM Standards:
3 3
sity of not more than 60 lb/ft [960 kg/m ].
C11 Terminology Relating to Gypsum and Related Build-
2
ing Materials and Systems
6. Sampling
2
C28 Specification for Gypsum Plasters
6.1 Randomly select at least 1 % of the packages, but not
C35 Specification for Inorganic Aggregates for Use in
less than five packages. Take samples from both the outer
2
Gypsum Plaster
portion and the center of each package. Mix the samples so
C 472 Test Methods for Physical Testing of Gypsum, Gyp-
obtained to provide a composite sample of not less than 15 lb
2
sum Plasters and Gypsum Concrete
[6.5 kg]. Immediately place the sample in a clean, dry, airtight
container for delivery to the laboratory.
3. Terminology
3.1 Definitions of terms shall be in accordance with Termi-
7. Test Methods
nology C 11C11.
7.1 Determinethephysicalpropertiesofgypsumconcretein
accordance with Test Methods C 472C 472.
4. Materials and Manufacture
7.1.1 Determine the setting time by the Vicat method.
4.1 Gypsum concrete shall consist of calcined gypsum to
which is added aggregates, wood chips, or wood shavings in
8. Inspection
proportion to meet the applicable requirements of this specifi-
8.1 Inspection of the gypsum concrete shall be agreed upon
cation.
between the purchaser and the supplier as part of the purchase
4.2 Calcined Gypsum—Specification C 28C28.
agreement.
9. Rejection
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This specification is under the jurisdiction of ASTM Committee C11 on
Gypsum and Related Building Materials and is the direct responsibility of
9.1 Rejection of gypsum concrete that fails to conform to
Subcommittee C11.01 on Specifications a
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