ASTM C618-08

Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete

ABSTRACT
This specification covers coal fly ash and raw or calcined natural pozzolan for use in concrete where cementitious or pozzolanic action, or both, is desired, or where other properties normally attributed to fly ash or pozzolans may be desired, or where both objectives are to be achieved. Fly ash and natural pozzolans shall conform to the prescribed chemical composition requirements and physical requirements. The materials shall be tested for fineness, strength activity index, water requirement, soundness, and autoclave expansion or contraction.
SCOPE
1.1 This specification covers coal fly ash and raw or calcined natural pozzolan for use in concrete where cementitious or pozzolanic action, or both, is desired, or where other properties normally attributed to fly ash or pozzolans may be desired, or where both objectives are to be achieved.
Note 1—Finely divided materials may tend to reduce the entrained air content of concrete. Hence, if a fly ash or natural pozzolan is added to any concrete for which entrainment of air is specified, provision should be made to ensure that the specified air content is maintained by air content tests and by use of additional air-entraining admixture or use of an air-entraining admixture in combination with air-entraining hydraulic cement.  
1.2 The values stated in SI units are to be regarded as the standard.
1.3 The text of this standard references notes and footnotes, which provide explanatory information. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

General Information

• Status: Historical
• Publication Date: 29-Feb-2008
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.24 - Supplementary Cementitious Materials

Relations

• Replaces: ASTM C618-05 - Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
• Effective Date: 01-Mar-2008
• Replaced By: ASTM C618-08a - Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
• Effective Date: 01-Oct-2008
• Referred By: ASTM C1512-10(2020) - Standard Test Method for Characterizing the Effect of Exposure to Environmental Cycling on Thermal Performance of Insulation Products
• Effective Date: 01-Mar-2008
• Referred By: ASTM C1417M-19 - Standard Specification for Manufacture of Reinforced Concrete Sewer, Storm Drain, and Culvert Pipe for Direct Design (Metric)
• Effective Date: 01-Mar-2008
• Referred By: ASTM C1491-19 - Standard Specification for Concrete Roof Pavers (Withdrawn 2023)
• Effective Date: 01-Mar-2008
• Referred By: ASTM C1897-20 - Standard Test Methods for Measuring the Reactivity of Supplementary Cementitious Materials by Isothermal Calorimetry and Bound Water Measurements
• Effective Date: 01-Mar-2008
• Referred By: ASTM C139-22 - Standard Specification for Concrete Masonry Units for Construction of Catch Basins and Manholes
• Effective Date: 01-Mar-2008
• Referred By: ASTM C1293-20a - Standard Test Method for Determination of Length Change of Concrete Due to Alkali-Silica Reaction
• Effective Date: 01-Mar-2008
• Referred By: ASTM C655-19a - Standard Specification for Reinforced Concrete D-Load Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 01-Mar-2008
• Referred By: ASTM C938-19 - Standard Practice for Proportioning Grout Mixtures for Preplaced-Aggregate Concrete
• Effective Date: 01-Mar-2008
• Referred By: ASTM C654M-19 - Standard Specification for Porous Concrete Pipe (Metric)
• Effective Date: 01-Mar-2008
• Referred By: ASTM C937-23 - Standard Specification for Grout Fluidifier for Preplaced-Aggregate Concrete
• Effective Date: 01-Mar-2008
• Referred By: ASTM C1765-19 - Standard Specification for Steel Fiber Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe
• Effective Date: 01-Mar-2008
• Referred By: ASTM C14M-20 - Standard Specification for Nonreinforced Concrete Sewer, Storm Drain, and Culvert Pipe (Metric)
• Effective Date: 01-Mar-2008
• Referred By: ASTM C1670/C1670M-23 - Standard Specification for Adhered Manufactured Stone Masonry Veneer Units
• Effective Date: 01-Mar-2008

Standards Content (Sample)

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
Designation: C 618 – 08
Standard Specification for
Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use
1
in Concrete
This standard is issued under the fixed designation C 618; 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* 3.1.1 The terms used in this specification are defined in
Terminology C 125.
1.1 This specification covers coal fly ash and raw or
3.1.2 fly ash—the finely divided residue that results from
calcined natural pozzolan for use in concrete where cementi-
the combustion of ground or powdered coal and that is
tious or pozzolanic action, or both, is desired, or where other
transported by flue gasses.
properties normally attributed to fly ash or pozzolans may be
desired, or where both objectives are to be achieved.
NOTE 2—This definition of fly ash does not include, among other
things, the residue resulting from: (1) the burning of municipal garbage or
NOTE 1—Finely divided materials may tend to reduce the entrained air
any other refuse with coal; (2) the injection of lime directly into the boiler
content of concrete. Hence, if a fly ash or natural pozzolan is added to any
for sulfur removal; or (3) the burning of industrial or municipal garbage
concrete for which entrainment of air is specified, provision should be
in incinerators commonly known as “incinerator ash.”
made to ensure that the specified air content is maintained by air content
tests and by use of additional air-entraining admixture or use of an
4. Classification
air-entraining admixture in combination with air-entraining hydraulic
4.1 Class N—Raw or calcined natural pozzolans that com-
cement.
ply with the applicable requirements for the class as given
1.2 The values stated in SI units are to be regarded as the
herein, such as some diatomaceous earths; opaline cherts and
standard.
shales; tuffs and volcanic ashes or pumicites, calcined or
1.3 The text of this standard references notes and footnotes,
uncalcined; and various materials requiring calcination to
which provide explanatory information. These notes and foot-
induce satisfactory properties, such as some clays and shales.
notes (excluding those in tables and figures) shall not be
4.2 Class F—Flyashthatmeetstheapplicablerequirements
considered as requirements of the standard.
for this class as given herein. This class of fly ash has
pozzolanic properties.
2. Referenced Documents
2 4.3 Class C—Flyashthatmeetstheapplicablerequirements
2.1 ASTM Standards:
for this class as given herein. This class of fly ash, in addition
C 125 Terminology Relating to Concrete and Concrete
to having pozzolanic properties, also has some cementitious
Aggregates
properties.
C311 Test Methods for Sampling and Testing Fly Ash or
Natural Pozzolans for Use in Portland-Cement Concrete
NOTE 3—Class F fly ash is typically produced from burning anthracite
or bituminous coal, but may also be produced from subbituminous coal
3. Terminology
andfromlignite.ClassCflyashistypicallyproducedfromburninglignite
or subbituminous coal, and may also be produced from anthracite or
3.1 Definitions:
bituminous coal. Class C fly ashes contain total calcium contents,
expressed as calcium oxide (CaO), higher than 10 %.
1
This specification is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
5. Ordering Information
C09.24 on Supplementary Cementitious Materials.
5.1 The purchaser shall specify any supplementary optional
Current edition approved March 1, 2008. Published March 2008. Originally
approved in 1968. Last previous edition approved in 2005 as C 618–05. physical requirements.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2 The purchaser shall indicate which procedure, A or B,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
shallbeusedwhenspecifyingrequirementsforeffectivenessin
Standards volume information, refer to the standard’s Document Summary page on
contribution to sulfate resistance under Table 3.
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

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C618–08
TABLE 1 Chemical Requirements
Class
NF C
Silicon dioxide (SiO ) plus aluminum oxide (Al O ) plus iron oxide (Fe O ), 70.0 70.0 50.0
2 2 3 2 3
min, %
Sulfur trioxide (SO ), max, % 4.0 5.0 5.0
3
Moisture content, max, % 3.0 3.0 3.0
A
Loss
...

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:C618–05 Designation: C 618 – 08
Standard Specification for
Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use
1
in Concrete
This standard is issued under the fixed designation C 618; 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*
1.1 This specification covers coal fly ash and raw or calcined natural pozzolan for use in concrete where cementitious or
pozzolanicaction,orboth,isdesired,orwhereotherpropertiesnormallyattributedtoflyashorpozzolansmaybedesired,orwhere
both objectives are to be achieved.
NOTE 1—Finely divided materials may tend to reduce the entrained air content of concrete. Hence, if a fly ash or natural pozzolan is added to any
concrete for which entrainment of air is specified, provision should be made to ensure that the specified air content is maintained by air content tests and
by use of additional air-entraining admixture or use of an air-entraining admixture in combination with air-entraining hydraulic cement.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 The text of this standard references notes and footnotes, which provide explanatory information. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C 125 Terminology Relating to Concrete and Concrete Aggregates
C 311 Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland-Cement Concrete
3. Terminology
3.1 Definitions:
3.1.1 The terms used in this specification are defined in Terminology C 125.
3.1.2 fly ash—the finely divided residue that results from the combustion of ground or powdered coal and that is transported
by flue gasses.
NOTE 2—This definition of fly ash does not include, among other things, the residue resulting from: (1) the burning of municipal garbage or any other
refuse with coal; (2) the injection of lime directly into the boiler for sulfur removal; or ( 3) the burning of industrial or municipal garbage in incinerators
commonly known as “incinerator ash.”
4. Classification
4.1 Class N—Raworcalcinednaturalpozzolansthatcomplywiththeapplicablerequirementsfortheclassasgivenherein,such
as some diatomaceous earths; opaline cherts and shales; tuffs and volcanic ashes or pumicites, calcined or uncalcined; and various
materials requiring calcination to induce satisfactory properties, such as some clays and shales.
4.2 Class F—Fly ash normally produced from burning anthracite or bituminous coal that meets the applicable requirements for
this class as given herein. This class of fly ash has pozzolanic properties.
4.3 Class C—Flyashnormallyproducedfromligniteorsubbituminouscoalthatmeetstheapplicablerequirementsforthisclass
as given herein. This class of fly ash, in addition to having pozzolanic properties, also has some cementitious properties.
NOTE3—Some Class C fly ashes may contain lime contents higher than 10%. 3—Class F fly ash is typically produced from burning anthracite or
bituminous coal, but may also be produced from subbituminous coal and from lignite. Class C fly ash is typically produced from burning lignite or
subbituminous coal, and may also be produced from anthracite or bituminous coal. Class C fly ashes contain total calcium contents, expressed as calcium
oxide (CaO), higher than 10 %.
1
This specification is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.24 on
Supplementary Cementitious Materials.
Current edition approved JulyMarch 1, 2005.2008. Published July 2005.March 2008. Originally approved in 1968. Last previous edition approved in 20032005 as
C618–03.C 618–05.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. 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

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C618–08
TABLE 1 Chemical Requirements
Cla
...