ASTM C51-06
(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.
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Designation:C51–06
Standard Terminology Relating to
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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 the air in sufficient quantity to show physical signs of
hydration (difficult to determine visually in pulverized
1.1 This terminology refers to the terms relating to lime and
quicklime).
limestone products as used by the industry.
alkaline earth solutions (AES)—an aqueous solution of the
1.2 Where appropriate, the various terms defined below
oxide or hydroxide of an element of group IIa in the periodic
should be prefixed with one or other of the adjectives “high-
table, such as calcium or magnesium. These solutions may
calcium,” “magnesian,” or “dolomitic.” (Examples: dolomitic
be strongly alkaline. See pH.
quicklime; high-calcium hydraulic hydrated lime; magnesian
available lime index—thoseconstituentsofalimewhichenter
or dolomitic limestone.)
into a desired reaction under the conditions of a specific
1.3 Thecompositionofalimestoneshouldbegiveninterms
method or process.
of a percentage of the carbonates present. In limestone of
building or construction lime—a lime whose chemical and
interest to the lime industry, it is usually assumed that the
physical characteristics and method of processing make it
material consists almost entirely of carbonates. Where this
suitable for the ordinary or special construction uses of the
assumption is not valid, the percentage of noncarbonate mate-
product.
rial should be determined, and the composition expressed in
by-product lime—by-product limes include a variety of Cal-
terms of the carbonate material present.
cium and/or Calcium/Magnesium compounds that are usable
1.4 For specific application of lime or a limestone product,
for specific applications but generally do not meet one or
see the appropriate ASTM specification.
more specifications required of primary lime products.
2. Referenced Documents
Examples include lime kiln dust and lime hydrator rejects. It
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isadvisedthatthespecificcompositions,physicalproperties,
2.1 ASTM Standards:
performance characteristics, and anticipated variabilities of
C 270 Specification for Mortar for Unit Masonry
such materials be evaluated for the service intended.
3. Terminology
calcareous—originating from predominately calcium carbon-
ate or one of its derivative forms.
agricultural lime—either ground quicklime or hydrated lime
calcia—the chemical compound calcium oxide (CaO).
whose calcium and magnesium content is capable of neu-
calcined pozzolans—materials that are produced by calcina-
tralizing soil acidity.
tion of natural siliceous or alumino-siliceous earths, such
agricultural limestone—ground or pulverized limestone
calcination being for the purpose of activation of pozzolanic
whose calcium and magnesium content is capable of neu-
properties.
tralizing soil acidity.
Cement-Lime Mortar—Cement-Lime Mortar primarily con-
air-slaked lime—the product containing various proportions
sists of hydraulic cement, hydrated lime or lime putty,
of the oxides, hydroxides, and carbonates of calcium and
mason’s sand and water.
magnesium which results from the exposure of quicklime to
DISCUSSION—These mortars can be specified by proportions or
properties indicated in Specification C 270.
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This terminology is under the jurisdiction of ASTM Committee C07 on Lime
chemical lime—a quicklime or hydrated lime whose chemical
and is the direct responsibility of Subcommittee C07.08 on Editorial and Nomen-
and physical characteristics and method of processing make
clature.
it suitable for one or more of the many and varied chemical
Current edition approved Jan. 1, 2006. Published January 2006. Originally
approved in 1922. Last previous edition approved in 2005 as C 51 – 05a. and industrial uses of the product.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DISCUSSION—The chemical forms of calcium oxide (CaO), calcium
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
hydroxide (Ca(OH) ), magnesium oxide (MgO), or magnesium hy-
Standards volume information, refer to the standard’s Document Summary page on
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the ASTM website. droxide (Mg(OH) ) alone or in combination may be produced either
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C51–06
primarily or as a by-product of materials other than limestone, for
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