ASTM C580-02(2012)
(Test Method)Standard Test Method for Flexural Strength and Modulus of Elasticity of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes
Standard Test Method for Flexural Strength and Modulus of Elasticity of Chemical-Resistant Mortars, Grouts, Monolithic Surfacings, and Polymer Concretes
SIGNIFICANCE AND USE
4.1 This test method is generally applicable to rigid and semirigid materials. Although flexural strength cannot be determined for those materials that do not break, tangent modulus of elasticity can be determined.
4.2 The results obtained by this test method should serve as a guide in, but not as the sole basis for, selection of a chemical-resistant material for a particular application. No attempt has been made to incorporate into this test method all the various factors that may affect the performance of a material when subjected to actual service.
4.3 In addition to the tangent modulus of elasticity, a secant modulus is calculated at the point on the stress-strain (load-deflection) graph where the strain is 50 % of the maximum strain.
SCOPE
1.1 This test method covers the determination of flexural strength and modulus of elasticity in flexure of cured chemical-resistant materials in the form of molded rectangular beams. These materials include mortars, brick and tile grouts, structural grouts, machinery grouts, monolithic surfacings (60 mils or greater), and polymer concretes. These materials shall be based on resin, silicate, silica, or sulfur binders.
1.2 A bar of rectangular cross section is tested in flexure as a simple beam in center point loading: the bar rests on two supports and the load is applied by means of a loading nose midway between supports.
1.3 Method A outlines the testing procedure generally used for systems containing aggregate less than 0.2 in. (5 mm) in size. Method B covers the testing procedure generally used for systems containing aggregate from 0.2 to 0.4 in. (10 mm) in size. Method C is used for systems containing aggregate larger than 0.4 in.
1.4 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.
1.5 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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Standards Content (Sample)
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Designation: C580 − 02 (Reapproved 2012)
Standard Test Method for
Flexural Strength and Modulus of Elasticity of Chemical-
Resistant Mortars, Grouts, Monolithic Surfacings, and
Polymer Concretes
This standard is issued under the fixed designation C580; 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 U.S. Department of Defense.
1. Scope 2. Referenced Documents
2.1 ASTM Standards:
1.1 This test method covers the determination of flexural
C904 Terminology Relating to Chemical-Resistant Nonme-
strengthandmodulusofelasticityinflexureofcuredchemical-
tallic Materials
resistant materials in the form of molded rectangular beams.
C1312 Practice for Making and Conditioning Chemical-
These materials include mortars, brick and tile grouts, struc-
Resistant Sulfur Polymer Cement Concrete Test Speci-
tural grouts, machinery grouts, monolithic surfacings (60 mils
mens in the Laboratory
or greater), and polymer concretes. These materials shall be
E4 Practices for Force Verification of Testing Machines
based on resin, silicate, silica, or sulfur binders.
3. Terminology
1.2 A bar of rectangular cross section is tested in flexure as
a simple beam in center point loading: the bar rests on two
3.1 Definitions—For definitions of terms used in this test
supports and the load is applied by means of a loading nose
method, see Terminology C904.
midway between supports.
4. Significance and Use
1.3 Method A outlines the testing procedure generally used
4.1 This test method is generally applicable to rigid and
for systems containing aggregate less than 0.2 in. (5 mm) in
semirigid materials. Although flexural strength cannot be
size. Method B covers the testing procedure generally used for
determined for those materials that do not break, tangent
systems containing aggregate from 0.2 to 0.4 in. (10 mm) in
modulus of elasticity can be determined.
size. Method C is used for systems containing aggregate larger
4.2 The results obtained by this test method should serve as
than 0.4 in.
a guide in, but not as the sole basis for, selection of a
1.4 The values stated in inch-pound units are to be regarded
chemical-resistant material for a particular application. No
as standard. The values given in parentheses are mathematical
attempt has been made to incorporate into this test method all
conversions to SI units that are provided for information only
the various factors that may affect the performance of a
and are not considered standard.
material when subjected to actual service.
1.5 This standard does not purport to address all of the
4.3 In addition to the tangent modulus of elasticity, a secant
safety concerns, if any, associated with its use. It is the
modulus is calculated at the point on the stress-strain (load-
responsibility of the user of this standard to establish appro-
deflection) graph where the strain is 50 % of the maximum
priate safety and health practices and determine the applica-
strain.
bility of regulatory limitations prior to use.
5. Apparatus
5.1 Weighing Equipment, shall be capable of weighing
materials or specimens to 60.3 % accuracy.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.46 on Industrial Protective Coatings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Aug. 1, 2012. Published September 2012. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1965. Last previous edition approved in 2008 as C580 – 02 (2008). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C0580-02R12. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C580 − 02 (2012)
5.2 Equipment for Mixing Materials, shall consist of a 6.2.1 For Method A, the specimen shall be 1 6 ⁄16 in. (25
container of suitable size, preferably corrosion-resistant, a 6 1 mm) square by 10 to 14 in. (254 to 356 mm) long.
3 1
spatula, trowel, or mechanical mixer, and a ⁄8 in. diameter rod
6.2.2 For Method B, the specimens shall be 2 6 ⁄8 in. (25
with a rounded end, for use in casting specimens.
6 1 mm) square by 12 to 16 in. (305 to 406 mm) long.
6.2.3 For Method C, the specimens shall be rectangular
5.3 Specimen Molds:
beams with cross section as in 5.3.3 and with a length equal to
5.3.1 Method A—Molds to permit the casting of bars 1 6
1 the span plus 2 to 12 in. (51 to 305 mm).
⁄16 in. (25 6 1 mm) square by 10 in. (250 mm) minimum
length.
6.3 Specimen Preparation Temperature:
5.3.1.1 For sulfur mortars, the following additional equip-
6.3.1 Resin, Silicate, and Silica Materials—The standard
ment is required:
temperatureofthematerials,molds,apparatus,andtheambient
(1) Cover Plate, of a size sufficient to enclose the open side
temperature of the mixing area shall be 73 6 4°F (23 6 2°C),
of the bar mold. The base plate from another similar bar mold
unless otherwise specified by the manufacturer. Record the
has been found to be acceptable.
actual temperature.
(2) C-Clamp, large enough to fasten the cover plate se-
6.3.2 Sulfur Mortars—The material shall be maintained at
curely over the bar mold.
275 6 15°F. The temperature of the molds and the ambient
(3) Melting Chamber, of sufficient volume and heat capac-
temperature of the mixing area shall be 73 6 4°F (23 6 2°C).
ity to melt the sulfur mortar sample and maintain the tempera-
Record the actual temperature.
ture of the melt between 260 and 290°F (127 and 143°C).
6.3.3 For Sulfur Concrete, the material, mold, apparatus,
(4) Laboratory Mixer, of such a type and speed to be
and mixing equipment shall be 275 6 15°F (135 6 8°C),
capable of lifting the aggregate without beating air into the
unless otherwise specified by the manufacturer. Refer to
melt.
Practice C1312.
(5) Ladle, of sufficient capacity to completely pour one bar.
6.4 Molding Test Specimens:
(6) Masking Tape, 1 in. (25 mm), or an equivalent.
6.4.1 Lubricate the mold by applying a thin film of an
5.3.2 Method B—Molds to permit the casting of bars 2 6 ⁄8
appropriate mold release or lubricant.
in. (50 6 3 mm) square by 12 in. (300 mm) minimum length.
5.3.3 Method C—Molds to permit casting of rectangular 6.4.2 Resin, Silicate, and Silica Materials—Mix a sufficient
amountofthecomponentsintheproportionsandinthemanner
beamsshallhaveaminimumcross-sectionaldimensionof2in.
and at least three times the nominal maximum size of the specified by the manufacturer of the materials. Fill the molds
one-half full. Remove any entrapped air by using a cutting and
coarse aggregate in the polymer concrete (Note 1). The bar
length shall be at least three times the beam depth plus 2 in. stabbing motion with a spatula or rounded-end rod. Fill the
remainder of the mold, working down into the previously
NOTE 1—The nominal maximum size of coarse aggregate is that size
placed portion. Upon completion of the filling operation, the
next larger than the largest sieve on which at least 15 % of the coarse
tops of the specimens should extend slightly above the tops of
aggregate by weight is retained.
the molds. When the molds have been filled, strike off the
5.4 Testing Machine—The testing machine shall be of any
excess material, even with the top of the mold. Permit the
type sufficient to provide the required load and the rate of
material to remain in the mold until it has set sufficiently to
deflection prescribed. It shall have been verified to have an
allow removal without danger of deformation or breakage.
accuracyof1.0 %orbetterwithintwelvemonthsofthetimeof
6.4.3 Silicate Materials—Some silicates may require cover-
use in accordance with Practices E4. It shall be equipped with
ing during the curing period. After removal from the molds,
an appropriate device to record deflection and produce a graph
acid-treat the specimens, if required, in accordance with the
of load versus deflection.
recommendations given by the manufacturer. No other treat-
5.5 Loading Nose and Supports—The loading nose and
ment shall be permitted. Record the method of treatment in the
supports shall have cylindrical surfaces. To avoid excessive
report section under Conditioning Procedure.
indentation, the radius of the nose and supports shall be at least
6.4.4 Sulfur Mortars:
1 1
⁄8 in. for MethodAspecimens, ⁄4 in. for Method B specimens,
6.4.4.1 Assemble the mold described in 5.3.1 for the speci-
and ⁄2 in. for Method C specimens.
mens. Cover the bolt hole in the mold end piece with 1 in. (25
mm) masking tape or other material.
6. Test Specimens
6.4.4.2 Carefully place the cover plate onto the mold,
6.1 All specimens for a single determination shall be made
covering only one of the end pieces. Apply a C-clamp around
from a single mix containing sufficient amounts of the com-
the mold and cover plate in such a manner as to hold the
ponents in the proportions and in the manner specified by the
longitudinal mold pieces firmly in place with the cover plate.
manufacturer of the materials. If the proportions so specified
6.4.4.3 Remove the uncovered end piece, being careful not
are by volume, the components shall be weighed and the
to disturb the side bars.
corresponding proportions by weight shall be reported.
6.4.4.4 Stand the mold on end, supporting it in such a
6.1.1 Number of Specimens—Prepare a minimum of six te
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