ASTM_C_580_-_18.pdf

Designation:C58018Standard Test Method forFlexural Strength and Modulus of Elasticity of Chemical-Resistant Mortars,Grouts,Monolithic Surfacings,andPolymer Concretes1This standard is issued under the fixed designation C580;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of 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.Scope1.1 This test method covers the determination of flexuralstrength and modulus of elasticity in flexure of cured chemical-resistant materials in the form of molded rectangular beams.These materials include mortars,brick and tile grouts,struc-tural grouts,machinery grouts,monolithic surfacings(60 milsor greater),and polymer concretes.These materials shall bebased on resin,silicate,silica,or sulfur binders.1.2 A bar of rectangular cross section is tested in flexure asa simple beam in center point loading:the bar rests on twosupports and the load is applied by means of a loading nosemidway between supports.1.3 Method A outlines the testing procedure generally usedfor systems containing aggregate less than 0.2 in.(5 mm)insize.Method B covers the testing procedure generally used forsystems containing aggregate from 0.2 to 0.4 in.(10 mm)insize.Method C is used for systems containing aggregate largerthan 0.4 in.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles 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:2C904 Terminology Relating to Chemical-Resistant Nonme-tallic MaterialsC1312 Practice for Making and Conditioning Chemical-Resistant Sulfur Polymer Cement Concrete Test Speci-mens in the LaboratoryE4 Practices for Force Verification of Testing MachinesE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,see Terminology C904.4.Significance and Use4.1 This test method is generally applicable to rigid andsemirigid materials.Although flexural strength cannot bedetermined for those materials that do not break,tangentmodulus of elasticity can be determined.4.2 The results obtained by this test method should serve asa guide in,but not as the sole basis for,selection of achemical-resistant material for a particular application.Noattempt has been made to incorporate into this test method allthe various factors that may affect the performance of amaterial when subjected to actual service.4.3 In addition to the tangent modulus of elasticity,a secantmodulus is calculated at the point on the stress-strain(load-deflection)graph where the strain is 50%of the maximumstrain.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved July 1,2018.Published November 2018.Originallyapproved in 1965.Last previous edition approved in 2012 as C580 02(2012).DOI:10.1520/C0580-18.2For 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 standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized 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.1 5.Apparatus5.1 Weighing Equipment,shall be capable of weighingmaterials or specimens to 60.3%accuracy.5.2 Equipment for Mixing Materials,shall consist of acontainer of suitable size,preferably corrosion-resistant,aspatula,trowel,or mechanical mixer,and a38in.diameter rodwith a rounded end,for use in ca