ASTM C91-99

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

• Replaced By: ASTM C91-01 - Standard Specification for Masonry Cement
• Effective Date: 10-Aug-2001
• 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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 91 – 99
Standard Specification for
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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.
1. Scope C 230 Specification for Flow Table for Use in Tests of
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Hydraulic Cement
1.1 This specification covers three types of masonry cement
C 266 Test Method for Time of Setting of Hydraulic Ce-
for use where mortar for masonry is required.
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ment Paste by Gillmore Needles
1.2 The values stated in SI units are to be regarded as the
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C 270 Specification for Mortar for Unit Masonry
standard. Values in SI units shall be obtained by measurement
C 305 Practice for Mechanical Mixing of Hydraulic Cement
in SI units or by appropriate conversion of measurements made
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Pastes and Mortars of Plastic Consistency
in other units, using the Rules for Conversion and Rounding
C 430 Test Method for Fineness of Hydraulic Cement by
given in IEEE/ASTM SI 10.
2
the 45-μm (No. 325) Sieve
1.3 The text of this standard refers to notes and footnotes
C 511 Specification for Moist Cabinets, Moist Rooms, and
which provide explanatory material. These notes and footnotes
Water Storage Tanks Used in the Testing of Hydraulic
(excluding those in tables and figures) shall not be considered
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Cements and Concretes
as requirements of the standard.
2
C 778 Specification for Standard Sand
1.4 The following safety hazards caveat pertains only to
IEEE/ASTM SI 10 Standard for Use of the International
Sections 19 and 20 of this specification. This standard does not
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System of Units (SI): The Modern Metric System
purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this standard
3. Terminology
to establish appropriate safety and health practices and
3.1 Definitions:
determine the applicability of regulatory limitations prior to
3.1.1 masonry cement—a hydraulic cement, primarily used
use.
in masonry and plastering construction, consisting of a mixture
2. Referenced Documents of portland or blended hydraulic cement and plasticizing
materials (such as limestone, hydrated or hydraulic lime)
2.1 ASTM Standards:
together with other materials introduced to enhance one or
C 109/C 109M Test Method for Compressive Strength of
more properties such as setting time, workability, water reten-
Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube
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tion, and durability.
Specimens)
3.1.2 Other terms used in this standard are defined in
C 114 Test Methods for Chemical Analysis of Hydraulic
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Terminology C 219.
Cement
C 151 Test Method for Autoclave Expansion of Portland
4. Classification
2
Cement
4.1 Type N—For use in preparation of Specification C 270
C 183 Practice for Sampling and the Amount of Testing of
2 Type N mortar without further addition of cements or hydrated
Hydraulic Cement
lime, and for use in preparation of Specification C 270 Type S
C 185 Test Method for Air Content of Hydraulic Cement
2 or Type M mortar when cement is added in accordance with the
Mortar
requirements of C 270.
C 187 Test Method for Normal Consistency of Hydraulic
2 4.2 Type S—For use in preparation of Specification C 270
Cement
2 Type S mortar without further addition of cements or hydrated
C 188 Test Method for Density of Hydraulic Cement
2 lime.
C 219 Terminology Relating to Hydraulic Cement
4.3 Type M—For use in preparation of Specification C 270
Type M mortar without further addition of cements or hydrated
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This specification is under the jurisdiction of ASTM Committee C-1 on Cement
lime.
and is the direct responsibility of Subcommittee C01.11 on Masonry Cement.
Current edition approved Nov. 10, 1999. Published February 2000. Originally
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published as C 91 – 32 T. Last previous edition C 91 – 98. Annual Book of ASTM Standards, Vol 04.05.
2
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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.
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C91
5. Physical Properties molds for measurement and testing in the autoclave. Calculate
the difference in length of the test specimen before and after
5.1 Masonry cement shall conform to the applicable re-
autoclaving to the nearest 0.01 % of the effective gauge length
quirements prescribed in Table 1 for its classification.
and report as the autoclave expansion of the masonry cement.
6. Staining
12. Time of Setting
6.1 This requirement shall apply only when the purchaser
12.1 Determine the time
...