ASTM C91/C91M-23
(Specification)Standard Specification for Masonry Cement
Standard Specification for Masonry Cement
ABSTRACT
This specification covers three types of masonry cement for use where mortar for masonry is required. Masonry cement shall conform to the applicable physical property requirements prescribed. The masonry cement shall be sampled in accordance with practice C 183. The temperature and relative humidity of the air in the vicinity of the mixing slab and dry materials, molds, base plates, and mixing bowl shall conform to the requirements of test method C 109/C 109M. Determine normal consistency by the Vicat apparatus in accordance with test method C 187. Determine autoclave expansion in accordance with test method C 151. Determine the time of setting by the Gillmore needle method in accordance with test method C 266. Determine the density of the masonry cement in accordance with test method C 188, using kerosene as the liquid. The sand shall be a blend of equal parts by weight of graded standard sand and standard 20-30 sand conforming to specification C 778. The compressive testing procedures for mortars are presented. Water retention shall be determined in accordance with the procedures in test method C 1506.
SCOPE
1.1 This specification covers three types of masonry cement for use where mortar for masonry is required.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Values in SI units shall be obtained by measurement in SI units or by appropriate conversion, using the Rules for Conversion and Rounding given in Standard IEEE/ASTM SI 10, of measurements made in other units. Values are stated in only SI units when inch-pound units are not used in practice.
1.3 The text of this standard refers to 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.
1.4 The following safety hazards caveat pertains only to Sections 15 and 16 of this specification. 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. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)2
1.5 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
Relations
Buy Standard
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:C91/C91M −23
Standard Specification for
1
Masonry Cement
This standard is issued under the fixed designation C91/C91M; 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
3
1.1 This specification covers three types of masonry cement 2.1 ASTM Standards:
for use where mortar for masonry is required. C109/C109M Test Method for Compressive Strength of
Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube
1.2 Units—The values stated in either SI units or inch-
Specimens)
pound units are to be regarded separately as standard. The
C183/C183M Practice for Sampling and the Amount of
values stated in each system may not be exact equivalents;
Testing of Hydraulic Cement
therefore,eachsystemshallbeusedindependentlyoftheother.
C185 Test Method for Air Content of Hydraulic Cement
Combining values from the two systems may result in non-
Mortar
conformance with the standard. Values in SI units shall be
C187 Test Method for Amount of Water Required for Nor-
obtained by measurement in SI units or by appropriate
mal Consistency of Hydraulic Cement Paste
conversion, using the Rules for Conversion and Rounding
C188 Test Method for Density of Hydraulic Cement
given in Standard IEEE/ASTM SI 10, of measurements made
C219 Terminology Relating to Hydraulic and Other Inor-
in other units. Values are stated in only SI units when
ganic Cements
inch-pound units are not used in practice.
C266 Test Method for Time of Setting of Hydraulic-Cement
1.3 The text of this standard refers to notes and footnotes
Paste by Gillmore Needles
which provide explanatory material. These notes and footnotes
C270 Specification for Mortar for Unit Masonry
(excluding those in tables and figures) shall not be considered
C305 Practice for Mechanical Mixing of Hydraulic Cement
as requirements of the standard.
Pastes and Mortars of Plastic Consistency
1.4 The following safety hazards caveat pertains only to C430 Test Method for Fineness of Hydraulic Cement by the
Sections 15 and 16 of this specification. This standard does not
45-µm (No. 325) Sieve
purport to address all of the safety concerns, if any, associated
C511 Specification for Mixing Rooms, Moist Cabinets,
with its use. It is the responsibility of the user of this standard Moist Rooms, and Water Storage Tanks Used in the
to establish appropriate safety, health, and environmental
Testing of Hydraulic Cements and Concretes
practices and determine the applicability of regulatory limita- C778 Specification for Standard Sand
tions prior to use. (Warning—Fresh hydraulic cementitious
C1506 Test Method for Water Retention of Hydraulic
mixtures are caustic and may cause chemical burns to skin and Cement-Based Mortars and Plasters
2
tissue upon prolonged exposure.)
IEEE/ASTM SI 10 Standard for Use of the International
1.5 This international standard was developed in accor- System of Units (SI): The Modern Metric System
dance with internationally recognized principles on standard-
3. Terminology
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3.1 Definitions:
mendations issued by the World Trade Organization Technical
3.1.1 masonry cement, n—a hydraulic cement, primarily
Barriers to Trade (TBT) Committee.
used in masonry and plastering construction, consisting of a
mixture of portland or blended hydraulic cement and plasticiz-
ing materials (such as limestone, hydrated or hydraulic lime)
1
This specification is under the jurisdiction of ASTM Committee C01 on
together with other materials introduced to enhance one or
Cement and is the direct responsibility of Subcommittee C01.11 on Masonry
Cement.
Current edition approved Jan. 1, 2023. Published January 2023. Originally
3
approved in 1932. Last previous edition approved in 2018 as C91/C91M – 18. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/C0091_C0091M-23. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
Annual Book of ASTM Standards, Vol 04.01. See the section on Safety Standards volume information, refer to the standard’s Document Summary page on
Precautions in the Manual of Cement Testing. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh
...
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: C91/C91M − 18 C91/C91M − 23
Standard Specification for
1
Masonry Cement
This standard is issued under the fixed designation C91/C91M; 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 Scope*
1.1 This specification covers three types of masonry cement for use where mortar for masonry is required.
1.2 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from
the two systems may result in non-conformance with the standard. Values in SI units shall be obtained by measurement in SI units
or by appropriate conversion, using the Rules for Conversion and Rounding given in Standard IEEE/ASTM SI 10, of
measurements made in other units. Values are stated in only SI units when inch-pound units are not used in practice.
1.3 The text of this standard refers to 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.
1.4 The following safety hazards caveat pertains only to Sections 1615 and 1716 of this specification. 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. (Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon
prolonged exposure.Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue
2
upon prolonged exposure.))
1.5 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
3
2.1 ASTM Standards:
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens)
C151 Test Method for Autoclave Expansion of Hydraulic Cement
C183C183/C183M Practice for Sampling and the Amount of Testing of Hydraulic Cement
C185 Test Method for Air Content of Hydraulic Cement Mortar
C187 Test Method for Amount of Water Required for Normal Consistency of Hydraulic Cement Paste
C188 Test Method for Density of Hydraulic Cement
1
This specification is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.11 on Masonry Cement.
Current edition approved March 1, 2018Jan. 1, 2023. Published April 2018January 2023. Originally approved in 1932. Last previous edition approved in 20122018 as
C91/C91M – 12.C91/C91M – 18. DOI: 10.1520/C0091_C0091M-18.10.1520/C0091_C0091M-23.
2
Annual Book of ASTM Standards, Vol 04.01. See the section on Safety Precautions in the Manual of Cement Testing.
3
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C91/C91M − 23
C219 Terminology Relating to Hydraulic and Other Inorganic Cements
C266 Test Method for Time of Setting of Hydraulic-Cement Paste by Gillmore Needles
C270 Specification for Mortar for Unit Masonry
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C430 Test Method for Fineness of Hydraulic Cement by the 45-μm (No. 325) Sieve
C511 Specification for Mixing Rooms, Moist Cabinets, Moist Rooms, and Water Storage Tanks Used in the Testing of Hydraulic
Cements and Concretes
C778 Specification for Standard Sand
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.