ASTM C307-99
(Test Method)Standard Test Method for Tensile Strength of Chemical-Resistant Mortar, Grouts, and Monolithic Surfacings
Standard Test Method for Tensile Strength of Chemical-Resistant Mortar, Grouts, and Monolithic Surfacings
SCOPE
1.1 This test method covers the determination of tensile strength of cured chemical-resistant materials in the form of molded briquets. These materials include mortars, brick and tile grouts, machinery grouts, and monolithic surfacings. These materials shall be based on resin, silicate, silica, or sulfur binders.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 307 – 99
Standard Test Method for
Tensile Strength of Chemical-Resistant Mortar, Grouts, and
Monolithic Surfacings
This standard is issued under the fixed designation C 307; 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 (e) 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 grouts, and monolithic surfacings containing aggregate greater
than ⁄4 in.
1.1 This test method covers the determination of tensile
strength of cured chemical-resistant materials in the form of
5. Apparatus
molded briquets. These materials include mortars, brick and
5.1 Weighing Equipment, shall be capable of weighing
tile grouts, machinery grouts, and monolithic surfacings. These
materials or specimens to 60.3 % accuracy.
materials shall be based on resin, silicate, silica, or sulfur
5.2 Specimen Molds—The molds for making briquet test
binders.
specimens shall be sufficiently rigid to prevent deformation
1.2 The values stated in inch-pound units are to be regarded
during molding and shall be made of corrosion-resistant
as the standard. The values given in parentheses are for
material. Gang molds, when used, shall be of the type shown in
information only.
Fig. 1. The dimensions of the briquet molds shall be the width
1.3 This standard does not purport to address all of the
of the mold, between inside faces, at waist line of briquet, 1 in.
safety concerns, if any, associated with its use. It is the
(25 mm) with permissible variations of 60.01 in. (60.25 mm);
responsibility of the user of this standard to establish appro-
the thickness of the molds measured at the point of greatest
priate safety and health practices and determine the applica-
thickness of either side of the mold at the waist line, 1 in. with
bility of regulatory limitations prior to use.
permissible variations of +0.004 in. (+0.10 mm) and −0.002 in.
2. Referenced Documents (−0.05 mm). The briquet test specimens shall conform to the
dimensional requirements shown in Fig. 2.
2.1 ASTM Standards:
5.3 Equipment for Mixing Materials, shall consist of a
C 904 Terminology Relating to Chemical-Resistant Non-
container of suitable size, preferably corrosion resistant, and a
metallic Materials
strong, sturdy spatula, trowel, or mechanical mixer.
E 4 Practices for Force Verification of Testing Machines
5.4 The following additional equipment is required for
3. Terminology sulfur mortars.
5.4.1 Melting Chamber, of sufficient volume and heat ca-
3.1 Definitions:
pacity to melt the mortar sample and maintain the temperature
3.1.1 For definitions of terms used in this test method, see
of the melt between 260 and 290°F (127 and 143°C).
Terminology C 904.
5.4.2 Laboratory Mixer, of such a type and speed to be
4. Significance and Use
capable of lifting the aggregate without beating air into the
melt.
4.1 It is recognized that chemical-resistant mortars, grouts,
5.4.3 Ladle, of sufficient capacity to completely pour one
and monolithic surfacings are not usually under tension when
briquet.
in service; however, such data are useful for purposes of
5.5 Testing Machine, the testing machine shall be of any
determining the rate of cure and other properties.
type sufficient to provide the required load and the rate of
4.2 This test method is not recommended for mortars,
crosshead movement prescribed. It shall have been verified to
have an accuracy of 1.0 % or better within 12 months of the
This test method is under the jurisdiction of ASTM Committee C-3 on
Chemical-Resistant Nonmetallic Materialsand is the direct responsibility of Sub- The sole source of supply of the Forney capping compound melting chamber,
committee C03.01on Test Methods. Model LA-0130, known to the committee at this time is Forney Industries, Inc.,
Current edition approved Oct. 10, 1999. Published December 1999. Originally 1565 Broadway Ave., Hermitage, PA 16148. If you are aware of alternative
published as C 307–53T. Last previous edition C 307–94. suppliers, please provide this information to ASTM Headquarters. Your comments
Annual Book of ASTM Standards, Vol 04.05. will receive careful consideration at a meeting of the responsible technical
Annual Book of ASTM Standards, Vol 03.01. committee, which you may attend.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 307
remainder of the mold, working down into the previously
placed portion. Upon completion of the filling operations, the
tops of the specimens should extend slightly above the tops of
the molds. When the molds have been filled, strike off the
excess material so that it is even with the top of the mold.
FIG. 1 Briquet Gang Mold
Permit the material to remain in the mold until it has set
sufficiently to allow removal without danger of deformation or
breakage.
6.3.3 Silicate Materials—Some silicates may require cov-
ering during the curing period. After removal from the molds,
acid-treat the specimens, if required, in accordance with the
recommendations given by the manufacturer. No other treat-
ment shall be permitted. Record the method of treatment in the
report section under Conditioning Procedure.
6.3.4 Sulfur Mortars:
6.3.4.1 Assemble the mold as you would for the specimens
to be cast in 6.3.2. However, cover the waist of the mold with
a small lubricated plate.
6.3.4.2 Melt at least 2.2 lb (1.0 kg) of sulfur mortar in the
melt chamber in not more than 1 h. Hold the temperature of the
melt at 2756 15°F for at least 15 min w
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