ASTM C91-01

Standard Specification for Masonry Cement

SCOPE
1.1 This specification covers three types of masonry cement for use where mortar for masonry is required.
1.2 The values stated in SI units are to be regarded as the standard. Values in SI units shall be obtained by measurement in SI units or by appropriate conversion of measurements made in other units, using the Rules for Conversion and Rounding given in IEEE/ASTM SI 10.
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 17 and 18 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Aug-2001
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C01 - Cement
• Drafting Committee: C01.11 - Masonry Cement

Relations

• Replaces: ASTM C91-99 - Standard Specification for Masonry Cement
• Effective Date: 10-Aug-2001
• Replaced By: ASTM C91-03 - Standard Specification for Masonry Cement
• Effective Date: 10-Feb-2003
• Referred By: ASTM C110-20 - Standard Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone
• Effective Date: 10-Aug-2001
• Referred By: ASTM C1660-10(2018) - Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry
• Effective Date: 10-Aug-2001
• Referred By: ASTM C1722-23 - Standard Guide for Repair and Restoration of Dimension Stone
• Effective Date: 10-Aug-2001

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.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 91 – 01
Standard Specification for
1
Masonry Cement
This standard is issued under the fixed designation C 91; 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.
2
1. Scope ment Paste by Gillmore Needles
3
C 270 Specification for Mortar for Unit Masonry
1.1 This specification covers three types of masonry cement
C 305 Practice for Mechanical Mixing of Hydraulic Cement
for use where mortar for masonry is required.
2
Pastes and Mortars of Plastic Consistency
1.2 The values stated in SI units are to be regarded as the
C 430 Test Method for Fineness of Hydraulic Cement by
standard. Values in SI units shall be obtained by measurement
2
the 45-μm (No. 325) Sieve
in SI units or by appropriate conversion of measurements made
C 511 Specification for Moist Cabinets, Moist Rooms, and
in other units, using the Rules for Conversion and Rounding
Water Storage Tanks Used in the Testing of Hydraulic
given in IEEE/ASTM SI 10.
2
Cements and Concretes
1.3 The text of this standard refers to notes and footnotes
2
C 778 Specification for Standard Sand
which provide explanatory material. These notes and footnotes
IEEE/ASTM SI 10 Standard for Use of the International
(excluding those in tables and figures) shall not be considered
4
System of Units (SI): The Modern Metric System
as requirements of the standard.
1.4 The following safety hazards caveat pertains only to
3. Terminology
Sections 17 and 18 of this specification. This standard does not
3.1 Definitions:
purport to address all of the safety concerns, if any, associated
3.1.1 masonry cement—a hydraulic cement, primarily used
with its use. It is the responsibility of the user of this standard
in masonry and plastering construction, consisting of a mixture
to establish appropriate safety and health practices and
of portland or blended hydraulic cement and plasticizing
determine the applicability of regulatory limitations prior to
materials (such as limestone, hydrated or hydraulic lime)
use.
together with other materials introduced to enhance one or
2. Referenced Documents more properties such as setting time, workability, water reten-
tion, and durability.
2.1 ASTM Standards:
3.1.2 Other terms used in this standard are defined in
C 109/C 109M Test Method for Compressive Strength of
Terminology C 219.
Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube
2
Specimens)
4. Classification
C 151 Test Method for Autoclave Expansion of Portland
2 4.1 Type N—For use in preparation of Specification C 270
Cement
Type N mortar without further addition of cements or hydrated
C 183 Practice for Sampling and the Amount of Testing of
2 lime, and for use in preparation of Specification C 270 Type S
Hydraulic Cement
or Type M mortar when cement is added in accordance with the
C 185 Test Method for Air Content of Hydraulic Cement
2 requirements of C 270.
Mortar
4.2 Type S—For use in preparation of Specification C 270
C 187 Test Method for Normal Consistency of Hydraulic
2 Type S mortar without further addition of cements or hydrated
Cement
2 lime.
C 188 Test Method for Density of Hydraulic Cement
2 4.3 Type M—For use in preparation of Specification C 270
C 219 Terminology Relating to Hydraulic Cement
Type M mortar without further addition of cements or hydrated
C 230 Specification for Flow Table for Use in Tests of
2 lime.
Hydraulic Cement
C 266 Test Method for Time of Setting of Hydraulic Ce-
5. Physical Properties
5.1 Masonry cement shall conform to the applicable re-
1
This specification is under the jurisdiction of ASTM Committee C01 on
quirements prescribed in Table 1 for its classification.
Cement and is the direct responsibility of Subcommittee C01.11 on Masonry
Cement.
Current edition approved Aug. 10, 2001. Published October 2001. Originally
3
published as C 91 – 32 T. Last previous edition C 91 – 99. Annual Book of ASTM Standards, Vol 04.05.
2 4
Annual Book of ASTM Standards, Vol 04.01. Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
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.
C91
TABLE 1 Physical Requirements
Masonry Cement Type N S M
Fineness, residue on a 45-μm (No. 325) sieve, max, % 24 24 24
Autoclave expansion, max, % 1.0 1.0 1.0
Time of setting, Gillmore method:
Initial set, minutes, not less than 120 90 90
Final set, minutes,
...