ASTM C206-14(2022)
(Specification)Standard Specification for Finishing Hydrated Lime
Standard Specification for Finishing Hydrated Lime
ABSTRACT
This specification covers two types of finishing hydrated lime that are suitable for use in the scratch, brown, and finish coats of plaster, for stucco, for mortar, and as an addition to Portland-cement concrete. The two types of lime are Type N and Type S. Finishing hydrated lime shall show no pops or pits. Chemical composition shall conform to the required contents of calcium and magnesium oxides, carbon dioxide, and unhydrated oxides. The plasticity figure for the lime is specified. The following test methods shall be performed: chemical analysis and physical tests.
SCOPE
1.1 This specification covers two types of finishing hydrated lime that are suitable for use in the scratch, brown, and finish coats of plaster, for stucco, for mortar, and as an addition to portland-cement concrete. The two types of lime sold under this specification shall be designated as follows:
1.1.1 Type N—Normal hydrated lime for finishing purposes, and
1.1.2 Type S—Special hydrated lime for finishing purposes.
Note 1: Type N, normal finishing hydrated lime, is differentiated from Type S, special finishing hydrated lime, in that no limitation on the amount of unhydrated oxides is specified for Type N hydrate, and the plasticity requirement for Type N hydrate shall be determined after soaking for 16 to 24 h.
Note 2: For lime putty, refer to Specification C1489.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 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
- Published
- Publication Date
- 30-Jun-2022
- Technical Committee
- C07 - Lime and Limestone
- Drafting Committee
- C07.02 - Specifications and Guidelines
Relations
- Effective Date
- 01-Oct-2023
- Effective Date
- 01-May-2019
- Effective Date
- 01-Dec-2018
- Refers
ASTM C110-16 - Standard Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone - Effective Date
- 01-Dec-2016
- Effective Date
- 01-Jun-2015
- Refers
ASTM C110-15 - Standard Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone - Effective Date
- 01-Jun-2015
- Refers
ASTM C110-14 - Standard Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone - Effective Date
- 01-Dec-2014
- Effective Date
- 01-Dec-2014
- Refers
ASTM C110-11 - Standard Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone - Effective Date
- 01-Jun-2011
- Effective Date
- 01-Jun-2011
- Effective Date
- 01-Jun-2011
- Refers
ASTM C110-10 - Standard Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone - Effective Date
- 01-Dec-2010
- Effective Date
- 01-Oct-2010
- Effective Date
- 15-Jun-2009
- Effective Date
- 01-Jun-2009
Overview
ASTM C206-14(2022): Standard Specification for Finishing Hydrated Lime is a widely recognized standard developed by ASTM International. This specification establishes the requirements for two types of finishing hydrated lime-Type N (Normal) and Type S (Special)-that are suitable for various applications in the construction industry. Specifically, this standard covers the use of finishing hydrated lime in the scratch, brown, and finish coats of plaster, stucco, mortar, and as an additive to Portland-cement concrete.
Adherence to ASTM C206 ensures consistent quality and performance of hydrated lime for finishing purposes, supporting the durability and workability demands in building projects. Developed in line with globally recognized principles for international standards, ASTM C206 is referenced by government bodies, architects, engineers, and contractors to achieve reliable and safe construction outcomes.
Key Topics
- Types of Finishing Hydrated Lime
- Type N (Normal): Used for general finishing purposes; plasticity is determined after soaking for 16 to 24 hours.
- Type S (Special): Designed with stricter limits on unhydrated oxides; plasticity measured within 30 minutes after mixing.
- Chemical Composition Requirements
- Must conform to specific levels of calcium and magnesium oxides and carbon dioxide.
- Limits on unhydrated oxides for Type S.
- Physical Requirements
- Residue limits on sieves to ensure fine particles.
- No popping or pitting when tested, ensuring smooth surface applications.
- Minimum plasticity figure, ensuring workability for plaster and mortar use.
- Test Methods
- Includes chemical analysis and physical tests using referenced ASTM methods for quality verification.
- Packaging and Marking
- Proper identification and pre-use preparation, especially for Type N, which requires pre-soaking.
Applications
ASTM C206-14(2022) finishing hydrated lime serves essential roles in various construction and masonry projects due to its beneficial properties:
- Plastering: Used in scratch, brown, and finish coats to improve workability, adhesion, and finish of interior and exterior plaster.
- Stucco: Provides durability and plasticity for stucco applications, enhancing resistance to cracking and weathering.
- Mortar: Acts as a plasticizer and improves water retention in masonry mortars, facilitating easier application and better bonding.
- Concrete Additive: Can be combined with Portland-cement concrete to enhance workability and finish quality, especially in specialty or restoration projects.
By meeting the ASTM C206 standard, suppliers and contractors can ensure their hydrated lime provides reliable performance, consistent results, and lasting quality in both new construction and renovation work.
Related Standards
Several related ASTM standards are referenced or associated with ASTM C206-14(2022), supporting comprehensive quality in building materials:
- ASTM C25: Test Methods for Chemical Analysis of Limestone, Quicklime, and Hydrated Lime
- ASTM C50: Practice for Sampling, Sample Preparation, Packaging, and Marking of Lime and Limestone Products
- ASTM C110: Test Methods for Physical Testing of Quicklime, Hydrated Lime, and Limestone
- ASTM C1271: Test Method for X-ray Spectrometric Analysis of Lime and Limestone
- ASTM C1301: Test Method for Major and Trace Elements in Limestone and Lime
- ASTM C1489: Specification for Lime Putty for Structural Purposes
- ASTM C842: Specification for Application of Interior Gypsum Plaster
- ASTM C51: Terminology Relating to Lime and Limestone
These standards collectively support the quality, safety, and performance expected in the use of hydrated lime for construction and masonry finishing applications.
Keywords: finishing hydrated lime, ASTM C206, plaster, stucco, mortar, Type N, Type S, construction materials standard, chemical composition, masonry, physical properties, international standard
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Frequently Asked Questions
ASTM C206-14(2022) is a technical specification published by ASTM International. Its full title is "Standard Specification for Finishing Hydrated Lime". This standard covers: ABSTRACT This specification covers two types of finishing hydrated lime that are suitable for use in the scratch, brown, and finish coats of plaster, for stucco, for mortar, and as an addition to Portland-cement concrete. The two types of lime are Type N and Type S. Finishing hydrated lime shall show no pops or pits. Chemical composition shall conform to the required contents of calcium and magnesium oxides, carbon dioxide, and unhydrated oxides. The plasticity figure for the lime is specified. The following test methods shall be performed: chemical analysis and physical tests. SCOPE 1.1 This specification covers two types of finishing hydrated lime that are suitable for use in the scratch, brown, and finish coats of plaster, for stucco, for mortar, and as an addition to portland-cement concrete. The two types of lime sold under this specification shall be designated as follows: 1.1.1 Type N—Normal hydrated lime for finishing purposes, and 1.1.2 Type S—Special hydrated lime for finishing purposes. Note 1: Type N, normal finishing hydrated lime, is differentiated from Type S, special finishing hydrated lime, in that no limitation on the amount of unhydrated oxides is specified for Type N hydrate, and the plasticity requirement for Type N hydrate shall be determined after soaking for 16 to 24 h. Note 2: For lime putty, refer to Specification C1489. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 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.
ABSTRACT This specification covers two types of finishing hydrated lime that are suitable for use in the scratch, brown, and finish coats of plaster, for stucco, for mortar, and as an addition to Portland-cement concrete. The two types of lime are Type N and Type S. Finishing hydrated lime shall show no pops or pits. Chemical composition shall conform to the required contents of calcium and magnesium oxides, carbon dioxide, and unhydrated oxides. The plasticity figure for the lime is specified. The following test methods shall be performed: chemical analysis and physical tests. SCOPE 1.1 This specification covers two types of finishing hydrated lime that are suitable for use in the scratch, brown, and finish coats of plaster, for stucco, for mortar, and as an addition to portland-cement concrete. The two types of lime sold under this specification shall be designated as follows: 1.1.1 Type N—Normal hydrated lime for finishing purposes, and 1.1.2 Type S—Special hydrated lime for finishing purposes. Note 1: Type N, normal finishing hydrated lime, is differentiated from Type S, special finishing hydrated lime, in that no limitation on the amount of unhydrated oxides is specified for Type N hydrate, and the plasticity requirement for Type N hydrate shall be determined after soaking for 16 to 24 h. Note 2: For lime putty, refer to Specification C1489. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 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.
ASTM C206-14(2022) is classified under the following ICS (International Classification for Standards) categories: 91.100.10 - Cement. Gypsum. Lime. Mortar. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM C206-14(2022) has the following relationships with other standards: It is inter standard links to ASTM C51-23, ASTM C25-19e1, ASTM C51-18, ASTM C110-16, ASTM C110-15e1, ASTM C110-15, ASTM C110-14, ASTM C110-14e1, ASTM C110-11, ASTM C25-11e1, ASTM C51-11, ASTM C110-10, ASTM C842-05(2010)e1, ASTM C110-09a, ASTM C1301-95(2009)e1. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM C206-14(2022) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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: C206 −14 (Reapproved 2022)
Standard Specification for
Finishing Hydrated Lime
This standard is issued under the fixed designation C206; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope C51 Terminology Relating to Lime and Limestone (as Used
by the Industry)
1.1 Thisspecificationcoverstwotypesoffinishinghydrated
C110 Test Methods for Physical Testing of Quicklime,
lime that are suitable for use in the scratch, brown, and finish
Hydrated Lime, and Limestone
coats of plaster, for stucco, for mortar, and as an addition to
C842 Specification forApplication of Interior Gypsum Plas-
portland-cement concrete. The two types of lime sold under
ter
this specification shall be designated as follows:
C1271 Test Method for X-ray Spectrometric Analysis of
1.1.1 Type N—Normal hydrated lime for finishing purposes,
Lime and Limestone
and
C1301 Test Method for Major and Trace Elements in Lime-
1.1.2 Type S—Special hydrated lime for finishing purposes.
stone and Lime by Inductively Coupled Plasma-Atomic
NOTE 1—Type N, normal finishing hydrated lime, is differentiated from
Emission Spectroscopy (ICP) and Atomic Absorption
TypeS,specialfinishinghydratedlime,inthatnolimitationontheamount
(AA)
of unhydrated oxides is specified for Type N hydrate, and the plasticity
C1489 Specification for Lime Putty for Structural Purposes
requirement for Type N hydrate shall be determined after soaking for 16
to 24 h.
NOTE 2—For lime putty, refer to Specification C1489.
3. Terminology
1.2 The values stated in inch-pound units are to be regarded
3.1 Definitions—For definitions of terms relating to hy-
as standard. The values given in parentheses are mathematical
drated lime, refer to Terminology C51.
conversions to SI units that are provided for information only
and are not considered standard.
4. Chemical Composition
1.3 This international standard was developed in accor-
4.1 Hydrated lime for finishing purposes shall conform to
dance with internationally recognized principles on standard-
the following requirements as to chemical composition:
ization established in the Decision on Principles for the
Type N Type S
Development of International Standards, Guides and Recom-
Calcium and magnesium oxides (LOI-free basis), 95 95
min, %
mendations issued by the World Trade Organization Technical
Carbon dioxide (as-received basis), max, %
Barriers to Trade (TBT) Committee.
If sample is taken at the place of manufacture 5 5
If sample is taken at any other place 7 7
Unhydrated oxides (as-received basis), max, % . 8
2. Referenced Documents
2.1 ASTM Standards:
5. Residue
C25 Test Methods for Chemical Analysis of Limestone,
5.1 The percentage residue of finishing hydrated lime shall
Quicklime, and Hydrated Lime
conform to the following requirements:
C50 Practice for Sampling, Sample Preparation, Packaging,
and Marking of Lime and Limestone Products Residue retained on 600 µm (No. 30) sieve, max, % 0.5
Residue retained on 75 µm (No. 200) sieve, max, % 15
6. Popping and Pitting
This specification
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