ASTM C1329/C1329M-23

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: C1329/C1329M − 16a C1329/C1329M − 23
Standard Specification for
Mortar Cement
This standard is issued under the fixed designation C1329/C1329M; 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.
1. Scope*
1.1 This specification covers three types of mortar 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 Section 1615. 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 safety,
health, and healthenvironmental 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 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
2.1 ASTM Standards:
C91C91/C91M Specification for Masonry Cement
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
C219 Terminology Relating to Hydraulic and Other Inorganic Cements
C266 Test Method for Time of Setting of Hydraulic-Cement Paste by Gillmore Needles
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 Dec. 1, 2016Jan. 1, 2023. Published December 2016January 2023. Originally approved in 1996. Last previous edition approved in 2016 as
C1329/C1329M – 16.C1329/C1329M – 16a. DOI: 10.1520/C1329_C1329M-16A.10.1520/C1329_C1329M-23.
Annual Book of ASTM Standards, Vol 04.01. See the section on Safety Precautions in the Manual of Cement Testing.
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
C1329/C1329M − 23
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
C1072 Test Methods for Measurement of Masonry Flexural Bond Strength
C1506 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—Terms used in this specification are defined in Terminology C219.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 mortar cement, n—a hydraulic cement, primarily used in masonry construction, consisting of a mixture of portland or
blended hydraulic cement and plasticizing materials (such as limestone or hydrated or hydraulic lime), together with other
materials introduced to enhance one or more properties such as setting time, workability, water retention, and durability.
3.2.1.1 Discussion—
Mortar cement is similar to masonry cement in use and function (see Specification C91C91/C91M). However, Specification C1329
includes a flexural bond strength requirement.
4. Classification
4.1 Mortar cements are classified as Type N, S, or M, according to the physical requirements prescribed in Table 1.
5. Physical Properties
5.1 Mortar cement shall conform to the applicable requirements prescribed in Table 1 for its classification.
6. Sampling
6.1 At the option of the purchaser, the cement shall be sampled and tested to verify compliance with this specification, sampling
and testing shall be performed in accordance with Practice C183C183/C183M.
6.2 Practice C183C183/C183M is not designed for manufacturing quality control and is not required for manufacturer’s
certification.
7. Temperature and Humidity
7.1 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 C109/C109M.
TABLE 1 Physical Requirements
Mortar 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
Initial set, minutes, not more than 1000 1000 1000
Compressive strength (average of three cubes):
The compressive strength of mortar cubes, composed of 1 part cement and 3 parts blended sand (half graded
standard sand and half standard 20-30 sand) by volume, prepared and tested in accordance with this
specification, shall be equal to or higher than the values specified for the ages indicated below:
7 days, MPa [psi] 3.5 [500] 9.0 [1300] 12.4 [1800]
28 days, MPa [psi] 6.2 [900] 14.5 [2100] 20.0 [2900]
Flexural bond strength
28 days, min, MPa [psi] 0.5 [70] 0.7 [100] 0.8 [115]
Air content of mortar:
Min, volume % 8 8 8
Max, volume % 21 19 19
Water retention value, min, %, of original flow 70 70 70
C1329/C1329M − 23
7.2 The moist cabinet or moist room shall conform to the requirements of Specification C511.
8. Fineness
8.1 Determine the residue on the 45 μm 45 μm (No. 325) sieve in accordance with Test Method C430.
9. Normal Consistency
9.1 Determine the normal consistency by the Vicat apparatus in accordance with Test Method C187.
10. Autoclave Expansion
10.1 Determine the autoclave expansion in accordance with Test Method C151. After molding, store the bars in the moist cabinet
or room for 48 h 6 30 min before removal from the molds for measurement and testing in the autoclave. Calculate the difference
in length of the test specimen before and after autoclaving to the nearest 0.01 % of the effective gauge length, and report as the
autoclave expansion of the mortar cement.
10. Time of Setting
10.1 Determine the time of setting by the
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