ASTM C618-19

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 standard. No other units of measurement are included in this 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.  
1.4 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: Historical
• Publication Date: 31-Dec-2018
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.24 - Supplementary Cementitious Materials

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C618 −19
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 C618; 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* C311/C311M Test Methods for Sampling and Testing Fly
Ash or Natural Pozzolans for Use in Portland-Cement
1.1 This specification covers coal fly ash and raw or
Concrete
calcined natural pozzolan for use in concrete where cementi-
C1778 Guide for Reducing the Risk of Deleterious Alkali-
tious or pozzolanic action, or both, is desired, or where other
Aggregate Reaction in Concrete
properties normally attributed to fly ash or pozzolans may be
desired, or where both objectives are to be achieved.
3. Terminology
NOTE 1—Finely divided materials may tend to reduce the entrained air
3.1 Definitions:
content of concrete. Hence, if a fly ash or natural pozzolan is added to any
3.1.1 For definitions of terms used in this specification refer
concrete for which entrainment of air is specified, provision should be
to Terminology C125.
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
cement.
4.1 Class N—Raw or calcined natural pozzolans that com-
1.2 The values stated in SI units are to be regarded as ply with the applicable requirements for the class as given
herein, such as some diatomaceous earths; opaline cherts and
standard. No other units of measurement are included in this
standard. shales; tuffs and volcanic ashes or pumicites, calcined or
uncalcined; and various materials requiring calcination to
1.3 The text of this standard references notes and footnotes,
induce satisfactory properties, such as some clays and shales.
which provide explanatory information. These notes and foot-
4.2 Class F—Fly ash that meets the applicable requirements
notes (excluding those in tables and figures) shall not be
considered as requirements of the standard. for this class as given herein. This class of fly ash has
pozzolanic properties.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.3 Class C—Fly ash that meets the applicable requirements
ization established in the Decision on Principles for the
for this class as given herein. This class of fly ash, in addition
Development of International Standards, Guides and Recom-
to having pozzolanic properties, also has some cementitious
mendations issued by the World Trade Organization Technical
properties.
Barriers to Trade (TBT) Committee.
NOTE 2—Class F fly ash is typically produced from burning anthracite
or bituminous coal, but may also be produced from subbituminous coal
2. Referenced Documents
andfromlignite.ClassCflyashistypicallyproducedfromburninglignite
2
or subbituminous coal, and may also be produced from anthracite or
2.1 ASTM Standards:
bituminous coal.
C125 Terminology Relating to Concrete and Concrete Ag-
gregates
5. Ordering Information
5.1 The purchaser shall specify any supplementary optional
physical requirements.
1
This specification is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
5.2 The purchaser shall indicate which procedure, A or B,
C09.24 on Supplementary Cementitious Materials.
shallbeusedwhenspecifyingrequirementsforeffectivenessin
Current edition approved Jan. 1, 2019. Published January 2019. Originally
approved in 1968. Last previous edition approved in 2017 as C618–17a. DOI: contribution to sulfate resistance under Table 3.
10.1520/C0618-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Chemical Composition
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1 Fly ash and natural pozzolans shall conform to the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. requirements as to chemical composition prescribed inTable 1.
*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

---------------------- Page: 1 ----------------------
C618−19
TABLE 1 Chemical Requirements
Class
NF C
Silicon dioxide (SiO ) plus aluminum oxide (Al O ) plus iron oxide (Fe O ), 70.0 50.0 50.0
2 2 3 2 3
min, %
Calciu
...

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 − 17a C618 − 19
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 C618; 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*
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 standard. No other units of measurement are included in this 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.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C125 Terminology Relating to Concrete and Concrete Aggregates
C311/C311M Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland-Cement Concrete
C1778 Guide for Reducing the Risk of Deleterious Alkali-Aggregate Reaction in Concrete
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this specification refer to Terminology C125.
4. Classification
4.1 Class N—Raw or calcined natural pozzolans that comply with the applicable requirements for the class as given herein, 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 that meets the applicable requirements for this class as given herein. This class of fly ash has pozzolanic
properties.
4.3 Class C—Fly ash that meets the applicable requirements for this class as given herein. This class of fly ash, in addition to
having pozzolanic properties, also has some cementitious properties.
NOTE 2—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
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 Dec. 15, 2017Jan. 1, 2019. Published January 2018January 2019. Originally approved in 1968. Last previous edition approved in 2017 as
C618–17.–17a. DOI: 10.1520/C0618-17A.10.1520/C0618-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM 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

---------------------- Page: 1 ----------------------
C618 − 19
TABLE 1 Chemical Requirements
Class
N F 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, %
Silicon dioxide (SiO ) plus aluminum oxide (Al O ) plus iron oxide (Fe O ), 70.0 50
...