ASTM C307-23

Standard Test Method for Tensile Strength of Chemical-Resistant Mortar, Grouts, and Monolithic Surfacings

SIGNIFICANCE AND USE
4.1 It is recognized that chemical-resistant mortars, grouts, and monolithic surfacings are not usually under tension when in service; however, such data are useful for purposes of determining the rate of cure and other properties.  
4.2 This test method is not recommended for mortars, grouts, and monolithic surfacings containing aggregate greater than 1/4 in.
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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-May-2023
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.46 - Industrial Protective Coatings

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C307 − 23
Standard Test Method for
Tensile Strength of Chemical-Resistant Mortar, Grouts, and
1
Monolithic Surfacings
This standard is issued under the fixed designation C307; 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 E4 Practices for Force Calibration and Verification of Test-
ing Machines
1.1 This test method covers the determination of tensile
E177 Practice for Use of the Terms Precision and Bias in
strength of cured chemical-resistant materials in the form of
ASTM Test Methods
molded briquets. These materials include mortars, brick and
E691 Practice for Conducting an Interlaboratory Study to
tile grouts, machinery grouts, and monolithic surfacings. These
Determine the Precision of a Test Method
materials shall be based on resin, silicate, silica, or sulfur
binders.
3. Terminology
1.2 The values stated in inch-pound units are to be regarded
3.1 Definitions:
as standard. The values given in parentheses are mathematical
3.1.1 For definitions of terms used in this test method, see
conversions to SI units that are provided for information only
Terminology C904.
and are not considered standard.
1.3 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 It is recognized that chemical-resistant mortars, grouts,
responsibility of the user of this standard to establish appro-
and monolithic surfacings are not usually under tension when
priate safety, health, and environmental practices and deter-
in service; however, such data are useful for purposes of
mine the applicability of regulatory limitations prior to use.
determining the rate of cure and other properties.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.2 This test method is not recommended for mortars,
ization established in the Decision on Principles for the
grouts, and monolithic surfacings containing aggregate greater
Development of International Standards, Guides and Recom-
1
than ⁄4 in.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
5. Apparatus
5.1 Weighing Equipment, shall be capable of weighing
2. Referenced Documents
materials or specimens to 60.3 % accuracy.
2
2.1 ASTM Standards:
5.2 Specimen Molds—The molds for making briquet test
C904 Terminology Relating to Chemical-Resistant Nonme-
specimens shall be sufficiently rigid to prevent deformation
tallic Materials
during molding and shall be made of corrosion-resistant
material. Gang molds, when used, shall be of the type shown in
Fig. 1. The dimensions of the briquet molds shall be the width
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
of the mold, between inside faces, at waist line of briquet, 1 in.
and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.46 on Industrial Protective Coatings.
The width and the depth of the briquet mold at the waist line
Current edition approved June 1, 2023. Published June 2023. Originally
shall be 1 in. 6 0.02 in. (25 mm 6 0.5 mm). The molds shall
published in 1953. Last previous edition approved in 2018 as C307 – 18. DOI:
conform to the dimensional requirements shown in Fig. 2.
10.1520/C0307-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.3 Equipment for Mixing Materials, shall consist of a
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
container of suitable size, preferably corrosion resistant, and a
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. strong, sturdy spatula, trowel, or mechanical mixer.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C307 − 23
5.4 The following additional equipment is required for
sulfur mortars.
5.4.1 Melting Chamber, of sufficient volume and heat ca-
pacity to melt the mortar sample and maintain the temperature
3
of the melt between 260 °F and 290 °F (127 °C and 143 °C).
FIG. 1 Briquet Gang Mold
5.4.2 Laboratory Mixer, of such a type and speed to be
capable of lifting the aggregate without beating air into the
melt.
5.4.3 Ladle, of sufficient
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C307 − 18 C307 − 23
Standard Test Method for
Tensile Strength of Chemical-Resistant Mortar, Grouts, and
1
Monolithic Surfacings
This standard is issued under the fixed designation C307; 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
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 standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C904 Terminology Relating to Chemical-Resistant Nonmetallic Materials
E4 Practices for Force Calibration and Verification of Testing Machines
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, see Terminology C904.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.46 on Industrial Protective Coatings.
Current edition approved July 1, 2018June 1, 2023. Published November 2018June 2023. Originally published in 1953. Last previous edition approved in 20122018 as
C307C307 – 18. – 03 (2012). DOI: 10.1520/C0307-18. DOI: 10.1520/C0307-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C307 − 23
4. Significance and Use
4.1 It is recognized that chemical-resistant mortars, grouts, and monolithic surfacings are not usually under tension when in
service; however, such data are useful for purposes of determining the rate of cure and other properties.
1
4.2 This test method is not recommended for mortars, grouts, and monolithic surfacings containing aggregate greater than ⁄4 in.
5. Apparatus
5.1 Weighing Equipment, shall be capable of weighing materials or specimens to 60.3 % accuracy.
5.2 Specimen Molds—The molds for making briquet test specimens shall be sufficiently rigid to prevent deformation during
molding and shall be made of corrosion-resistant material. Gang molds, when used, shall be of the type shown in Fig. 1. The
dimensions of the briquet molds shall be the width of the mold, between inside faces, at waist line of briquet, 1 in. The width and
the depth of the briquet mold at the waist line shall be 1 in. 6 0.02in. (25mm 6 0.5mm).0.02 in. (25 mm 6 0.5 mm). The molds
shall conform to the dimensional requirements shown in Fig. 2.
5.3 Equipment for Mixing Materials, shall consist of a container of suitable size, preferably corrosion resistant, and a strong, sturdy
spatula, trowel, or mechanical mixer.
5.4 The following additional equipment is required for sulfur mortars.
5.4.1 Melting Chamber, of sufficient volume and heat capacity to melt the mortar sample and maintain the temperature of the melt
3
between 260 an
...