ASTM C618-2017 Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete《粉煤灰和混凝土用天然火山灰原料或者煅烧料的标准规格》.pdf
《ASTM C618-2017 Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete《粉煤灰和混凝土用天然火山灰原料或者煅烧料的标准规格》.pdf》由会员分享,可在线阅读,更多相关《ASTM C618-2017 Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete《粉煤灰和混凝土用天然火山灰原料或者煅烧料的标准规格》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C618 17Standard Specification forCoal Fly Ash and Raw or Calcined Natural Pozzolan for Usein Concrete1This standard is issued under the fixed designation C618; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f last revision. A number in parentheses indicates the year of last reapproval. Asuperscript 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 coa
3、l fly ash and raw orcalcined natural pozzolan for use in concrete where cementi-tious or pozzolanic action, or both, is desired, or where otherproperties normally attributed to fly ash or pozzolans may bedesired, or where both objectives are to be achieved.NOTE 1Finely divided materials may tend to
4、reduce the entrained aircontent of concrete. Hence, if a fly ash or natural pozzolan is added to anyconcrete for which entrainment of air is specified, provision should bemade to ensure that the specified air content is maintained by air contenttests and by use of additional air-entraining admixture
5、 or use of anair-entraining admixture in combination with air-entraining hydrauliccement.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 The text of this standard references notes and footnotes,which provide explanatory
6、information. These notes and foot-notes (excluding those in tables and figures) shall not beconsidered as requirements of the standard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles
7、 for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C125 Terminology Relating to Concrete and Concrete Ag-gregatesC311/C311M Test Methods for Sampling
8、and Testing FlyAsh or Natural Pozzolans for Use in Portland-CementConcreteC1778 Guide for Reducing the Risk of Deleterious Alkali-Aggregate Reaction in Concrete3. Terminology3.1 Definitions:3.1.1 The terms used in this specification are defined inTerminology C125.3.1.2 fly ashthe finely divided resi
9、due that results from theprocess of combustion of ground or powdered coal and that istransported by flue gasses.NOTE 2This definition of fly ash does not include, among otherthings, the residue resulting from: (1) fluidized bed combustion ash, (2)the burning of municipal solid waste or any other ref
10、use with coal, or (3)the burning of industrial or municipal solid waste in incinerators com-monly known as “incinerator ash.”4. Classification4.1 Class NRaw or calcined natural pozzolans that com-ply with the applicable requirements for the class as givenherein, such as some diatomaceous earths; opa
11、line cherts andshales; tuffs and volcanic ashes or pumicites, calcined oruncalcined; and various materials requiring calcination toinduce satisfactory properties, such as some clays and shales.4.2 Class FFly ash that meets the applicable requirementsfor this class as given herein. This class of fly
12、ash haspozzolanic properties.4.3 Class CFly ash that meets the applicable requirementsfor this class as given herein. This class of fly ash, in additionto having pozzolanic properties, also has some cementitiousproperties.NOTE 3Class F fly ash is typically produced from burning anthraciteor bitumino
13、us coal, but may also be produced from subbituminous coaland from lignite. Class C fly ash is typically produced from burning ligniteor subbituminous coal, and may also be produced from anthracite orbituminous coal. Class C fly ashes typically have total calcium contents,expressed as calcium oxide (
14、CaO), that are higher than Class F fly ashes.1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.24 on Supplementary Cementitious Materials.Current edition approved Oct. 1, 2017. Published October 2
15、017. Originallyapproved in 1968. Last previous edition approved in 2015 as C61815. DOI:10.1520/C0618-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standard
16、s Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally re
17、cognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15. Ordering Information5.1 The purchaser shall specify any su
18、pplementary optionalphysical requirements.5.2 The purchaser shall indicate which procedure, A or B,shall be used when specifying requirements for effectiveness incontribution to sulfate resistance under Table 3.6. Chemical Composition6.1 Fly ash and natural pozzolans shall conform to therequirements
19、 as to chemical composition prescribed in Table 1.NOTE 4The chemical component determinations and the limits placedon each do not predict the performance of the fly ash or natural pozzolanwith hydraulic cement in concrete, but collectively help describe compo-sition and uniformity of the material.7.
20、 Physical Properties7.1 Fly ash and natural pozzolans shall conform to thephysical requirements prescribed in Table 2. Supplementaryoptional physical requirements are shown in Table 3.8. Methods of Sampling and Testing8.1 Sample and test the fly ash or natural pozzolan inaccordance with the requirem
21、ents of Test Methods C311/C311M.8.2 Use cement of the type proposed for use in the workand, if available, from the mill proposed as the source of thecement, in all tests requiring the use of hydraulic cement.9. Storage and Inspection9.1 The fly ash or natural pozzolan shall be stored in such amanner
22、 as to permit easy access for proper inspection andidentification of each shipment.9.2 Inspection of the material shall be made as agreed uponby the purchaser and the seller as part of the purchase contract.10. Rejection10.1 The purchaser has the right to reject material that failsto conform to the
23、requirements of this specification. Rejectionshall be reported to the producer or supplier promptly and inwriting.TABLE 1 Chemical RequirementsClassNF CSilicon dioxide (SiO2) plus aluminum oxide (Al2O3) plus iron oxide (Fe2O3),min, %70.0 70.0 50.0Sulfur trioxide (SO3), max, % 4.0 5.0 5.0Moisture con
24、tent, max, % 3.0 3.0 3.0Loss on ignition, max, % 10.0 6.0A6.0AThe use of Class F pozzolan containing up to 12.0 % loss on ignition may be approved by the user if either acceptable performance records or laboratory test resultsare made available.TABLE 2 Physical RequirementsClassNFCFineness:Amount re
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