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ASTM C10/C10M-19

(Specification)

Standard Specification for Natural Cement

Standard Specification for Natural Cement

ABSTRACT
This specification covers natural cement. The chemical requirements and the physical requirements are detailed in the specification. The natural cement shall be subjected to fitness, autoclave expansion, time of setting, air content of mortar, and compressive strength tests using specified methods.
SCOPE
1.1 This specification covers natural cement and quick-setting natural cement.
Note 1: Examples of typical past uses of natural cement include unit masonry mortar, cement plaster, grout, whitewash, and concrete.  
1.2 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 [or inch-pound units] shall be obtained by measurement in SI units [or inch-pound units] or by appropriate conversion, using the Rules for Conversion and Rounding given in IEEE/ASTM SI 10, of measurements made in other units [or SI units]. Values are stated in only SI units when inch-pound units are not used in practice.  
1.3 The text of this standard references 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 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

Status
Historical
Publication Date
31-Oct-2019
ICS
91.100.10 - Cement. Gypsum. Lime. Mortar
Technical Committee
C01 - Cement
Drafting Committee
C01.10 - Hydraulic Cements for General Concrete Construction
Current Stage
Ref Project

Relations

Replaces
ASTM C10/C10M-14 - Standard Specification for Natural Cement
Effective Date
01-Nov-2019
Refers
ASTM C114-23 - Standard Test Methods for Chemical Analysis of Hydraulic Cement
Effective Date
01-Oct-2023
Refers
ASTM C219-20a - Standard Terminology Relating to Hydraulic and Other Inorganic Cements
Effective Date
01-Aug-2020
Refers
ASTM C305-20 - Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
Effective Date
15-Jul-2020
Refers
ASTM C219-20 - Standard Terminology Relating to Hydraulic and Other Inorganic Cements
Effective Date
01-Apr-2020
Refers
ASTM C185-20 - Standard Test Method for Air Content of Hydraulic Cement Mortar
Effective Date
01-Apr-2020
Refers
ASTM C185-19 - Standard Test Method for Air Content of Hydraulic Cement Mortar
Effective Date
01-Dec-2019
Refers
ASTM C219-19a - Standard Terminology Relating to Hydraulic and Other Inorganic Cements
Effective Date
15-Nov-2019
Refers
ASTM C219-19 - Standard Terminology Relating to Hydraulic Cement
Effective Date
01-Jun-2019
Refers
ASTM C150/C150M-19 - Standard Specification for Portland Cement
Effective Date
01-Apr-2019
Refers
ASTM C151/C151M-18 - Standard Test Method for Autoclave Expansion of Hydraulic Cement
Effective Date
01-Apr-2018
Refers
ASTM C465-18 - Standard Specification for Processing Additions for Use in the Manufacture<brk/> of Hydraulic Cements
Effective Date
01-Apr-2018
Refers
ASTM C786/C786M-17 - Standard Test Method for Fineness of Hydraulic Cement and Raw Materials by the 300-&#x3bc;m (No. 50), 150-&#x3bc;m (No. 100), and 75-&#x3bc;m (No. 200) Sieves by Wet Methods
Effective Date
01-Dec-2017
Refers
ASTM C151/C151M-16 - Standard Test Method for Autoclave Expansion of Hydraulic Cement
Effective Date
15-Dec-2016
Refers
ASTM C188-16 - Standard Test Method for Density of Hydraulic Cement
Effective Date
15-Dec-2016

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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:C10/C10M −19
Standard Specification for
1
Natural Cement
This standard is issued under the fixed designation C10/C10M; 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* C150/C150M Specification for Portland Cement
C151/C151M Test Method for Autoclave Expansion of Hy-
1.1 This specification covers natural cement and quick-
draulic Cement
setting natural cement.
C183/C183M Practice for Sampling and the Amount of
NOTE 1—Examples of typical past uses of natural cement include unit
Testing of Hydraulic Cement
masonry mortar, cement plaster, grout, whitewash, and concrete.
C185 Test Method for Air Content of Hydraulic Cement
1.2 The values stated in either SI units or inch-pound units
Mortar
are to be regarded separately as standard. The values stated in
C187 Test Method for Amount of Water Required for Nor-
each system may not be exact equivalents; therefore, each
mal Consistency of Hydraulic Cement Paste
system shall be used independently of the other. Combining
C188 Test Method for Density of Hydraulic Cement
values from the two systems may result in non-conformance
C191 TestMethodsforTimeofSettingofHydraulicCement
with the standard.Values in SI units [or inch-pound units] shall
by Vicat Needle
be obtained by measurement in SI units [or inch-pound units]
C204 Test Methods for Fineness of Hydraulic Cement by
or by appropriate conversion, using the Rules for Conversion
Air-Permeability Apparatus
and Rounding given in IEEE/ASTM SI 10, of measurements
C219 Terminology Relating to Hydraulic Cement
made in other units [or SI units]. Values are stated in only SI
C305 Practice for Mechanical Mixing of Hydraulic Cement
units when inch-pound units are not used in practice.
Pastes and Mortars of Plastic Consistency
1.3 The text of this standard references notes and footnotes
C465 Specification for Processing Additions for Use in the
which provide explanatory material. These notes and footnotes
Manufacture of Hydraulic Cements
(excluding those in tables and figures) shall not be considered
C688 Specification for Functional Additions for Use in
as requirements of the standard.
Hydraulic Cements
1.4 This international standard was developed in accor-
C778 Specification for Standard Sand
dance with internationally recognized principles on standard-
C786/C786M Test Method for Fineness of Hydraulic Ce-
ization established in the Decision on Principles for the
ment and Raw Materials by the 300-µm (No. 50), 150-µm
Development of International Standards, Guides and Recom-
(No. 100), and 75-µm (No. 200) Sieves by Wet Methods
mendations issued by the World Trade Organization Technical
IEEE/ASTM SI 10 Standard for Use of the International
Barriers to Trade (TBT) Committee.
System of Units (SI): The Modern Metric System
2. Referenced Documents
3. Terminology
2
2.1 ASTM Standards:
3.1 For definitions of terms related to this specification, see
C109/C109M Test Method for Compressive Strength of
Terminology C219.
Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube
Specimens)
4. Ordering Information
C114 Test Methods for Chemical Analysis of Hydraulic
Cement
4.1 Orders for material under this specification shall include
the following:
1
This test method is under the jurisdiction ofASTM Committee C01 on Cement
4.1.1 This specification number and date, and
and is the direct responsibility of Subcommittee C01.10 on Hydraulic Cements for
4.1.2 Optional physical requirements as given in 7.2.
General Concrete Construction.
Current edition approved Nov. 1, 2019. Published November 2019. Originally
approved in 1904. Last previous edition approved in 2014 as C10/C10M – 14. DOI:
5. Additions
10.1520/C0010_C0010M-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 The cement covered by this specification shall contain
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
no addition except as follows:
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 5.1.1 Water, or calcium sulfate, or both.
*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 ----------------------
C10/C10M−19
1937-1954: Maximum 15% retained on a 75-µm (No. 200) sieve.
5.1.2 Processing additions used in the manufacture of the
1904-1937: Maximum 10%
...

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: C10/C10M − 14 C10/C10M − 19
Standard Specification for
1
Natural Cement
This standard is issued under the fixed designation C10/C10M; 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 natural cement and quick-setting natural cement.
NOTE 1—Examples of typical past uses of natural cement include unit masonry mortar, cement plaster, grout, whitewash, and concrete.
1.2 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 [or inch-pound units] shall be obtained by
measurement in SI units [or inch-pound units] or by appropriate conversion, using the Rules for Conversion and Rounding given
in IEEE/ASTM SI 10, of measurements made in other units [or SI units]. Values are stated in only SI units when inch-pound units
are not used in practice.
1.3 The text of this standard references 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 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
2.1 ASTM Standards:
C109/C109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)
C114 Test Methods for Chemical Analysis of Hydraulic Cement
C150C150/C150M Specification for Portland Cement
C151C151/C151M 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
C191 Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle
C204 Test Methods for Fineness of Hydraulic Cement by Air-Permeability Apparatus
C219 Terminology Relating to Hydraulic Cement
C305 Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
C465 Specification for Processing Additions for Use in the Manufacture of Hydraulic Cements
C688 Specification for Functional Additions for Use in Hydraulic Cements
C778 Specification for Standard Sand
C786C786/C786M Test Method for Fineness of Hydraulic Cement and Raw Materials by the 300-μm (No. 50), 150-μm (No.
100), and 75-μm (No. 200) Sieves by Wet Methods
IEEE/ASTM SI 10 Standard for Use of the International System of Units (SI): The Modern Metric System
3. Terminology
3.1 For definitions of terms related to this specification, see Terminology C219.
1
This test method is under the jurisdiction of ASTM Committee C01 on Cement and is the direct responsibility of Subcommittee C01.10 on Hydraulic Cements for General
Concrete Construction.
Current edition approved Jan. 1, 2014Nov. 1, 2019. Published March 2014_____ 2019. Originally approved in 1904. Last previous edition approved in 20132014 as
C10/C10M – 13.C10/C10M – 14. DOI: 10.1520/C0010_C0010M-14.10.1520/C0010_C0010M-19.
2
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 ----------------------
C10/C10M − 19
4. Ordering Information
4.1 Orders for material under this specification shall include the following:
4.1.1 This specification number and date, and
4.1.2 Optional physical requirements as given in 7.2.
5. Additions
5.1 The cement covered by this specification shall contain
...

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ASTM C596-23(Test Method)
Standard Test Method for Drying Shrinkage of Mortar Containing Hydraulic Cement

SIGNIFICANCE AND USE
4.1 This test method establishes a selected set of conditions of temperature, relative humidity and rate of evaporation of the environment to which a mortar specimen of stated composition shall be subjected for a specified period of time during which its change in length is determined and designated “drying shrinkage.”  
4.2 The drying shrinkage of mortar as determined by this test method has a linear relation to the drying shrinkage of concrete made with the same cement and exposed to the same drying conditions.4 Hence this test method may be used when it is desired to develop data on the effect of a hydraulic cement on the drying shrinkage of concrete made with that cement.
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1.1 This test method determines the change in length on drying of mortar bars containing hydraulic cement and graded standard sand.  
1.2 The values stated in SI units are to be regarded as standard. When combined standards are referenced, the selection of measurement system is at the user’s discretion subject to the requirements of the referenced standard.  
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ABSTRACT
These test methods cover the chemical analyses of hydraulic cements. Specific chemical test methods are grouped as reference test methods and alternative test methods. The reference test methods are long accepted classical chemical test methods which provide a reasonably well-integrated basic scheme of analysis for hydraulic cements and are also required for referee analysis in those cases where conformance to chemical specification requirements are questioned. Apparatus and materials for the test method include balance, weights, glassware and laboratory containers, desiccators, filter paper, crucibles, and muffle furnace. Standard reagents for the test method shall be used within the limits of the specification. These reagents shall include purity agents, water, repackaged reagents, concentrated acids and ammonium hydroxide, nonstandardized solutions, and indicator solutions. Sample preparation and general test procedures shall be followed according to the specification. General procedures include sample weighing, taring of crucibles, weighing of ignited residues, volatilization of platinum, chemical analyses, and calculation. Reporting of analyses shall be of the following order: major components, minor components, and separate determinations. Reference test methods and procedures include determination of insoluble residue, silicon dioxide, ammonium hydroxide group, ferric oxide, phosphorus pentoxide, titanium dioxide, zinc oxide, aluminum oxide, calcium oxide, magnesium oxide, sulfur, loss on ignition, sodium and potassium oxides, manganic oxide, chloride, chloroform-soluble organic substances. Alternative test methods and procedures include determination of calcium oxide, calcium dioxide, magnesium oxide, loss on ignition, titanium dioxide, phosphorus pentoxide, manganic oxide, and free calcium oxide. The standardization used for qualification and for analysis of each constituent shall be determined by valid curve-fitting procedures.
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1.1 These test methods cover the chemical analyses of hydraulic cements. Any test methods of demonstrated acceptable precision and bias may be used for analysis of hydraulic cements, including analyses for referee and certification purposes, as explained in Section 4. Specific chemical test methods are provided for ease of reference for those desiring to use them. They are grouped as Reference Test Methods and Alternative Test Methods. The reference test methods are long accepted classical chemical test methods which provide a reasonably well-integrated basic scheme of analysis for hydraulic cements. The alternative test methods generally provide individual determination of specific analytes and may be used alone or as alternates and determinations within the basic scheme at the option of the analyst and as indicated in the individual method.  
1.2 Contents:    
Section  
Subject    
2  
Referenced Documents  
4  
Description of Referee Analyses  
4.1  
Referee Analyses  
5  
Qualification for Different Analyses  
5.1  
Certified Reference Materials  
5.2  
Requirements for Qualification Testing  
5.3  
Alternative Analyses  
5.4  
Performance Requirements for Rapid Test Methods  
6  
General  
6.1  
Interferences and Limitations  
6.2  
Apparatus and Materials  
6.3  
Reagents  
6.4  
Sample Preparation  
6.5  
General Procedures  
6.6  
Recommended Order for Reporting Analyses    
Reference Test Methods    
7  
Insoluble Residue  
8  
Silicon Dioxide  
8.2  
Cements with Insoluble Residue Less Than 1 %  
8.3  
Cements with Insoluble Residue Greater Than 1 %  
9  
Ammonium Hydroxide Group  
10  
Ferric Oxide  
11  
Phosphorus Pentoxide  
12  
Titanium Dioxide  
13  
Zinc Oxide  
14  
Aluminum Oxide  
15  
Calcium Oxide  
16  
Magnesium Oxide  
17  
Sulfur  
17.1  
Sulfur Trioxide  
17.2  
Sulfide  
18  
Loss On Ignition  
18.1  
Portland Cement  
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ASTM C1157/C1157M-23(Specification)
Standard Performance Specification for Hydraulic Cement

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1.1 This performance specification covers hydraulic cements for both general and special applications. There are no restrictions on the composition of the cement or its constituents (see Note 1).
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ABSTRACT
This specification covers the criteria and tests to be used for determining whether a processing addition meets the requirement. When proposed addition is accepted for general use in Portland cement, tests shall be made on cements prepared from at least five different clinkers. These clinkers shall represent two Type I cements, one Type II cement, and two Type III cements. Processing additions shall be evaluated by comparing cements containing the addition to otherwise identical cements from the same source without the addition, or containing a processing addition. The compressive strength and flexural strength of the concrete made with cement containing the addition shall be compared with strengths obtained with the control cement at similar ages. The properties of the materials shall be determined through the following tests in accordance with the following standard: chemical analysis of the cement, compound composition, fineness of cement, normal consistency, time of setting, autoclave expansion, air content of mortar, compressive strength of mortar, and drying shrinkage of mortar.
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1.1 This specification pertains to the criteria and tests to be used for determining whether a(n) organic or inorganic processing addition, when used in the recommended amount at the option of the cement producer in the manufacture of hydraulic cements, meets the requirements as prescribed by definition in Specifications C150/C150M, C1157/C1157M, C845/C845M, and C595/C595M. The materials listed in the following former ASTM Specifications shall be considered as meeting the organic processing additions requirements of this specification:    
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1.4 If required results obtained from another standard are not reported in the same system of units as used by this standard, it is permitted to convert those results using the conversion factors found in the SI Quick Reference Guide, Annex A in Form and Style for ASTM Standards, www.astm.org/COMMIT/Blue_Book.pdf.  
1.5 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
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Standard Specification for Rapid Hardening Hydraulic Cement

ABSTRACT
This specification covers performance requirements for rapid hardening hydraulic cements. There are no restrictions on the compositions of the cement or its constituents. The specification classifies cements by type based on specific requirements for very early compressive strength development. The following are the four types of rapid hardening cement: (1) Type URH, ultra rapid hardening for use where high early strength is desired; (2) Type VRH, very rapid hardening for use where very high early strength is desired; (3) Type MRH, medium rapid hardening for use where mid-range hardening high early strength is desired; and (4) Type GRH, general rapid hardening for use when the higher strength properties of a Type VRH or a Type MRH cement is not required. Cement of the type specified shall conform to all of the applicable standard physical requirements for compressive strength and drying shrinkage. Cement shall be tested using the following methods: autoclave expansion; time of setting; compressive strength; drying shrinkage of mortar; heat of hydration; surface resistance; alkali silica resistivity; and expansion in water.
SCOPE
1.1 This specification is for rapid hardening hydraulic cements. This is a specification giving performance requirements. There are no restrictions on the composition of the cement or its constituents.  
1.2 The specification classifies cements by type based on specific requirements for very early compressive strength development.  
1.3 The values stated in either SI units or inch-pound units shall be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
1.4 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) are not requirements of the standard.  
1.5 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)  
1.6 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.

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ASTM
ASTM C1905/C1905M-23(Specification)
Standard Specification for Cements that Require Carbonation Curing

SCOPE
1.1 This specification covers cements that require controlled exposure to carbon dioxide to achieve strength, referred to as carbonation curing. These cements are for use in concrete that does not contain steel reinforcement. There are no restrictions on the constituents of the cement. The producer is required to demonstrate that carbon dioxide is chemically bound by the cement.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. Values are stated in only SI units when inch-pound units are not used in practice.  
1.3 If required results obtained from another standard are not reported in the same system of units as used by this standard, it is permitted to convert those results using the conversion factors found in the SI Quick Reference Guide, Annex A in Form and Style for ASTM Standards, www.astm.org/COMMIT/Blue_Book.pdf.  
1.4 The text of this standard refers to notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) are not requirements of the standard.  
1.5 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.  
1.6 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.

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ASTM
ASTM C187-23(Test Method)
Standard Test Method for Amount of Water Required for Normal Consistency of Hydraulic Cement Paste

SIGNIFICANCE AND USE
4.1 This test method is intended to be used to determine the amount of water required to prepare hydraulic cement pastes with normal consistency, as required for certain standard tests.
SCOPE
1.1 This test method covers the determination of the normal consistency of hydraulic cement.  
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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. See 1.4 for a specific warning statement.  
1.4 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.

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ASTM
ASTM C1922-23(Test Method)
Standard Test Method for Water Retention of Hydraulic Cement-Based Mortars and Plasters by Way of Water Loss

SIGNIFICANCE AND USE
5.1 This test method provides a means for determining the ability of mortars and plasters to retain water when applied to specific substrates based on the intended use of the tested mortar.  
5.2 The results obtained using this test method may be used to compare the relative ability of mortars and plasters to retain water when applied to different substrates or in comparison to other mortars or plasters applied to the same substrate.  
5.2.1 If applied to the same substrate, water retention values of different mortar can be compared.  
5.2.2 One mortar may be applied to different substrates to understand the impact of varying substrates on water retention of the mortar.  
5.3 The results obtained using this test method do not necessarily indicate the degree of water retention when used with substrates found in the field. This is because the amount of water absorbed by the substrate depends not only on the ability of the mortar to retain water but also on the particular absorption of the substrate and environmental conditions. Environmental conditions are not taken into account in this test method.  
5.4 The results obtained using this test method for plasters (stucco) do not necessarily indicate the degree of water retention when the plaster is applied as a second coat on the surface of a previously applied plaster base coat, since the amount of water absorbed from the second coat of plaster depends on the rate of absorption of the base coat. This is also true when a plaster is applied as a coating on masonry units.
SCOPE
1.1 This test method provides for the determination of water retention of hydraulic cement based mortars and plasters. Water Retention is directly measured through the absorption of water from the mortar by the substrate. Various substrates may be chosen by the user based on the intended use of the tested mortar. This test method defines such substrates. Comparisons can be made between different mortars on the same substrate or the same mortar on different substrates.  
1.2 This test method provides a water retention value via direct water loss, while Test Method C1506 provides a water retention value via mortar flow.  
1.3 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. When combined standards are cited, the selection of the measurement systems is at the user’s discretion subject to the requirements of the referenced standard.  
1.4 The text of this test method references notes and footnotes that provide explanatory material. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of this standard.  
1.5 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. See the Safety Data Sheet for safety information regarding the materials being tested.  
1.6 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.

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