Standard Specification for Finishing Hydrated Lime

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-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.

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Publication Date
09-Nov-1997
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ASTM C206-84(1997) - Standard Specification for Finishing Hydrated Lime
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 206 – 84 (Reapproved 1997)
Standard Specification for
1
Finishing Hydrated Lime
This standard is issued under the fixed designation C 206; 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
Type N Type S
Calcium and magnesium oxides (nonvolatile basis), 95 95
1.1 This specification covers two types of finishing hydrated
min, %
lime that are suitable for use in the scratch, brown, and finish
Carbon dioxide (as-received basis), max, %
If sample is taken at the place of manufacture 5 5
coats of plaster, for stucco, for mortar, and as an addition to
If sample is taken at any other place 7 7
portland-cement concrete. The two types of lime sold under
Unhydrated oxides (as-received basis), max, % . 8
this specification shall be designated as follows:
5. Residue
1.1.1 Type N—Normal hydrated lime for finishing purposes,
and
5.1 The percentage residue of finishing hydrated lime shall
1.1.2 Type S—Special hydrated lime for finishing purposes.
conform to the following requirements:
Residue retained on No. 30 (600-μm) sieve, max, % 0.5
NOTE 1—Type N, normal finishing hydrated lime, is differentiated from
Residue retained on No. 200 (75-μm) sieve, max, % 15
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
6. Popping and Pitting
requirement for Type N hydrate shall be determined after soaking for 16
6.1 Finishing hydrated lime shall show no pops or pits when
to 24 h.
tested in accordance with the method prescribed in 10.1.2.
2. Referenced Documents
7. Plasticity
2.1 ASTM Standards:
7.1 The putty made from Type N, normal finishing hydrated
C 25 Test Methods for Chemical Analysis of Limestone,
2
lime, shall have a plasticity figure of not less than 200 when
Quicklime, and Hydrated Lime
soaked for a period of not less than 16 h nor more than 24 h.
C 50 Methods of Sampling, Inspection, Packing, and Mark-
2
7.2 The putty made from Type S, special finishing hydrated
ing of Lime and Limestone Products
lime, shall have a plasticity figure of not less than 200 when
C 51 Terminology Relating to Lime and Limestone (As
2
tested commencing within 30 min after mixing with water.
Used by the Industry)
C 110 Test Methods for Physical Testing of Quicklime,
8. Application of Interior Gypsum Plaster
2
Hydrated Lime, and Limestone
8.1 For recommended application procedures refer to Speci-
C 842 Specification for Application of Interior Gypsum
2
fica
...

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