ASTM C91-05

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 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 16 and 17 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.(Warning—Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)

General Information

• Status: Historical
• Publication Date: 14-Sep-2005
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C01 - Cement
• Drafting Committee: C01.11 - Masonry Cement

Relations

• Replaces: ASTM C91-03a - Standard Specification for Masonry Cement
• Effective Date: 15-Sep-2005
• Replaced By: ASTM C91/C91M-12 - Standard Specification for Masonry Cement
• Effective Date: 01-Apr-2012
• Referred By: ASTM C1722-23 - Standard Guide for Repair and Restoration of Dimension Stone
• Effective Date: 15-Sep-2005
• Referred By: ASTM C110-20 - Standard Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone
• Effective Date: 15-Sep-2005
• Referred By: ASTM C1660-10(2018) - Standard Specification for Thin-bed Mortar for Autoclaved Aerated Concrete (AAC) Masonry
• Effective Date: 15-Sep-2005

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C91 – 05
Standard Specification for
1
Masonry Cement
This standard is issued under the fixed designation C91; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) 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 C183 Practice for Sampling and the Amount of Testing of
Hydraulic Cement
1.1 This specification covers three types of masonry cement
C185 Test Method for Air Content of Hydraulic Cement
for use where mortar for masonry is required.
Mortar
1.2 The values stated in SI units are to be regarded as the
C187 Test Method for Normal Consistency of Hydraulic
standard. Values in SI units shall be obtained by measurement
Cement
inSIunitsorbyappropriateconversionofmeasurementsmade
C188 Test Method for Density of Hydraulic Cement
in other units, using the Rules for Conversion and Rounding
C219 Terminology Relating to Hydraulic Cement
given in IEEE/ASTM SI 10.
C266 TestMethodforTimeofSettingofHydraulic-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 16 and 17 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 and health practices and
Testing of Hydraulic Cements and Concretes
determine the applicability of regulatory limitations prior to
C778 Specification for Standard Sand
use. (Warning—Fresh hydraulic cementitious mixtures are
C1506 Test Method for Water Retention of Hydraulic
caustic and may cause chemical burns to skin and tissue upon
2 Cement-Based Mortars and Plasters
prolonged exposure.)
IEEE/ASTM SI 10 Standard for Use of the International
2. Referenced Documents System of Units (SI): The Modern Metric System
3
2.1 ASTM Standards:
3. Terminology
C109/C109M Test Method for Compressive Strength of
3.1 Definitions:
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
3.1.1 masonry cement—a hydraulic cement, primarily used
Specimens)
in masonry and plastering construction, consisting of a mixture
C151 Test Method for Autoclave Expansion of Hydraulic
of portland or blended hydraulic cement and plasticizing
Cement
materials (such as limestone, hydrated or hydraulic lime)
together with other materials introduced to enhance one or
1
This specification is under the jurisdiction of ASTM Committee C01 on
more properties such as setting time, workability, water reten-
Cement and is the direct responsibility of Subcommittee C01.11 on Masonry
tion, and durability.
Cement.
Current edition approved Sept. 15, 2005. Published October 2005. Originally
3.1.2 Other terms used in this specification are defined in
approved in 1932. Last previous edition approved in 2003 as C91 – 03a. DOI:
Terminology C219.
10.1520/C0091-05.
2
Annual Book of ASTM Standards, Vol 04.01. See the section on Safety
4. Classification
Precautions in the Manual of Cement Testing.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.1 Type N—For use in preparation of Specification C270
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Type N mortar without further addition of cements or hydrated
Standards volume information, refer to the standard’s Document Summary page on
lime, and for use in preparation of Specification C270 Type S
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C91–05
orTypeMmortarwhencementisaddedinaccordancewiththe 11. Time of Setting
requirements of C270.
11.1 Determine the time of setting by the Gillmore needle
4.2 Type S—For use in preparation of Specification C270
method in accordance with Test Method C266.
Type S mortar without further addition of cements or hydrated
lime.
12. Density
4.3 Type M—For use in preparation of Specification C270
Type M mortar without further addition of cements or hydrated
12.1 Determine the density of the masonry cement in
lim
...

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:C91–03a Designation: C 91 – 05
Standard Specification for
1
Masonry Cement
ThisstandardisissuedunderthefixeddesignationC 91;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) 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
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 16 and 17 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. (Warning— Fresh
2
hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)
2. Referenced Documents
3
2.1 ASTM Standards:
C 109/C 109M TestMethodforCompressiveStrengthofHydraulicCementMortars(Using2-in.or[50-mm]CubeSpecimens)
C 151 Test Method for Autoclave Expansion of PortlandHydraulic Cement
C 183 Practice for Sampling and the Amount of Testing of Hydraulic Cement
C 185 Test Method for Air Content of Hydraulic Cement Mortar
C 187 Test Method for Normal Consistency of Hydraulic Cement
C 188 Test Method for Density of Hydraulic Cement
3
C 219 Terminology Relating to Hydraulic Cement
3
C230/C230M Specification for Flow Table for Use in Tests of Hydraulic Cement Terminology Relating to Hydraulic Cement
C 266 Test Method for Time of Setting of Hydraulic Cement Paste by Gillmore Needles
C 270 Specification for Mortar for Unit Masonry
C 305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C 430 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
C 778 Specification for Standard Sand
C 1506 Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters
IEEE/ASTM SI 10 Standard for Use of the International System of Units (SI): The Modern Metric System
3. Terminology
3.1 Definitions:
3.1.1 masonry cement—a hydraulic cement, primarily used in masonry and plastering construction, consisting of a mixture of
portlandorblendedhydrauliccementandplasticizingmaterials(suchaslimestone,hydratedorhydrauliclime)togetherwithother
materials introduced to enhance one or more properties such as setting time, workability, water retention, and durability.
3.1.2 Other terms used in this specification are defined in Terminology C 219.
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 June 10, 2003.September 15, 2005. PublishedAugust 2003.October 2005. Originally approved in 1932. Last previous edition approved in 2003
as C 91 – 03a.
2
Annual Book of ASTM Standards, Vol 04.01. See the section on Safety Precautions in the Manual of Cement Testing.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 04.01.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

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C91–05
4. Classification
4.1 Type N—For use in preparation of Specification C 270Type N mortar without further addition of cements or hydrated lime,
and for use in preparation of Specification C 270 Type S or Type M mortar when cement is added in accordance with the
requirements
...