ASTM C51-05a
(Terminology)Standard Terminology Relating to Lime and Limestone (as used by the Industry)
Standard Terminology Relating to Lime and Limestone (as used by the Industry)
SCOPE
1.1 This terminology refers to the terms relating to lime and limestone products as used by the industry.
1.2 Where appropriate, the various terms defined below should be prefixed with one or other of the adjectives "high-calcium," "magnesian," or "dolomitic." (Examples: dolomitic quicklime; high-calcium hydraulic hydrated lime; magnesian or dolomitic limestone.)
1.3 The composition of a limestone should be given in terms of a percentage of the carbonates present. In limestone of interest to the lime industry, it is usually assumed that the material consists almost entirely of carbonates. Where this assumption is not valid, the percentage of noncarbonate material should be determined, and the composition expressed in terms of the carbonate material present.
1.4 For specific application of lime or a limestone product, see the appropriate ASTM specification.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
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Designation: C 51 – 05a
Standard Terminology Relating to
1
Lime and Limestone (as used by the Industry)
ThisstandardisissuedunderthefixeddesignationC 51;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
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 magnesium which results from the exposure of quicklime to
the air in sufficient quantity to show physical signs of
1.1 This terminology refers to the terms relating to lime and
hydration (difficult to determine visually in pulverized
limestone products as used by the industry.
quicklime).
1.2 Where appropriate, the various terms defined below
alkaline earth solutions (AES)—an aqueous solution of the
should be prefixed with one or other of the adjectives “high-
oxide or hydroxide of an element of group IIa in the periodic
calcium,” “magnesian,” or “dolomitic.” (Examples: dolomitic
table, such as calcium or magnesium. These solutions may
quicklime; high-calcium hydraulic hydrated lime; magnesian
be strongly alkaline. See pH.
or dolomitic limestone.)
available lime index—thoseconstituentsofalimewhichenter
1.3 Thecompositionofalimestoneshouldbegiveninterms
into a desired reaction under the conditions of a specific
of a percentage of the carbonates present. In limestone of
method or process.
interest to the lime industry, it is usually assumed that the
building or construction lime—a lime whose chemical and
material consists almost entirely of carbonates. Where this
physical characteristics and method of processing make it
assumption is not valid, the percentage of noncarbonate mate-
suitable for the ordinary or special construction uses of the
rial should be determined, and the composition expressed in
product.
terms of the carbonate material present.
by-product lime—by-product limes include a variety of Cal-
1.4 For specific application of lime or a limestone product,
cium and/or Calcium/Magnesium compounds that are usable
see the appropriate ASTM specification.
for specific applications but generally do not meet one or
2. Referenced Documents
more specifications required of primary lime products.
2
Examples include lime kiln dust and lime hydrator rejects. It
2.1 ASTM Standards:
isadvisedthatthespecificcompositions,physicalproperties,
C 270 Specification for Mortar for Unit Masonry
performance characteristics, and anticipated variabilities of
3. Terminology
such materials be evaluated for the service intended.
calcareous—originating from predominately calcium carbon-
agricultural lime—either ground quicklime or hydrated lime
ate or one of its derivative forms.
whose calcium and magnesium content is capable of neu-
calcia—the chemical compound calcium oxide (CaO).
tralizing soil acidity.
Cement-Lime Mortar—Cement-Lime Mortar primarily con-
agricultural limestone—ground or pulverized limestone
sists of hydraulic cement, hydrated lime or lime putty,
whose calcium and magnesium content is capable of neu-
mason’s sand and water.
tralizing soil acidity.
air-slaked lime—the product containing various proportions DISCUSSION—These mortars can be specified by proportions or
properties indicated in Specification C 270.
of the oxides, hydroxides, and carbonates of calcium and
chemical lime—a quicklime or hydrated lime whose chemical
and physical characteristics and method of processing make
1
This terminology is under the jurisdiction of ASTM Committee C07 on Lime
it suitable for one or more of the many and varied chemical
and is the direct responsibility of Subcommittee C07.08 on Editorial and Nomen-
clature.
and industrial uses of the product.
Current edition approved Nov. 15, 2005. Published December 2005. Originally
approved in 1922. Last previous edition approved in 2005 as C 51 – 05. DISCUSSION—The chemical forms of calcium oxide (CaO), calcium
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
hydroxide (Ca(OH) ), magnesium oxide (MgO), or magnesium hy-
2
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
droxide (Mg(OH) ) alone or in combination may be produced either
2
Standards volume information, refer to the standard’s Document Summary page on
primarily or as a by-product of materials other than limestone, for
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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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.
C51–05a
example, Ca(OH) form
...
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