ASTM_D_3203_-_D_3203M_-_17.pdf

Designation:D3203/D3203M17Standard Test Method forPercent Air Voids in Compacted Asphalt Mixtures1This standard is issued under the fixed designation D3203/D3203M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers determination of the percent airvoids in compacted asphalt mixtures.1.2 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.1.3 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 and health practices and determine the applica-bility of regulatory limitations prior to use.1.4 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:2D1188 Test Method for Bulk Specific Gravity and Density ofCompacted Bituminous Mixtures Using Coated SamplesD2041 Test Method for Theoretical Maximum SpecificGravity and Density of Bituminous Paving MixturesD2726 Test Method for Bulk Specific Gravity and Densityof Non-Absorptive Compacted Bituminous MixturesD3549 Test Method for Thickness or Height of CompactedBituminous Paving Mixture SpecimensD3666 Specification for Minimum Requirements for Agen-cies Testing and Inspecting Road and Paving MaterialsD4460 Practice for Calculating Precision Limits WhereValues are Calculated from Other Test MethodsD6752 Test Method for Bulk Specific Gravity and Densityof Compacted Bituminous Mixtures Using AutomaticVacuum Sealing MethodD6857 Test Method for Maximum Specific Gravity andDensity of Bituminous Paving Mixtures Using AutomaticVacuum Sealing Method3.Terminology3.1 Definitions:3.1.1 air voidsthe pockets of air between the bitumen-coated aggregate particles in a compacted asphalt mixture.3.1.2 dense asphalt mixturesasphalt mixtures in which theair voids are less than 10%when compacted.3.1.3 open asphalt mixturesasphalt mixtures in which theair voids are 10%or more when compacted.3.1.3.1 DiscussionFor borderline cases,an asphalt mix-ture shall be designated an open asphalt mixture if thecalculated percent air voids,based on either 6.1 or 6.2,is 10%or more.4.Significance and Use4.1 The percent of air voids in an asphalt mixture is used asone of the criteria in the design methods and for evaluation ofthe compaction imparted in asphalt paving projects.NOTE1The text of this test method references notes and footnoteswhich provide explanatory material.These notes and footnotes(excludingthose in tables and figures)shall not be considered as requirements of thetest method.NOTE2The quality of the results produced by this standard aredependent on the competence of the personnel performing the procedureand the capability,calibration,and maintenance of the equipment used.Agencies that meet the criteria of Specification D3666 are generallyconsidered capable of competent and objective testing/sampling/inspection,etc.Users of this standard are cautioned that compliance withSpecification D3666 alone does not completely ensure reliable results.Reliable results depend on many factors;following the suggestions ofSpecification D3666 or some similar acceptable guideline provides ameans of evaluating and controlling some of those factors.5.Sampling5.1 Samples for testing shall consist of specimens fromlaboratory-molded mixtures or cores from field-compactedmixtures.1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.21 onSpecific Gravity and Density of Asphalt Mixtures.Current edition approved April 1,2017.Published April 2017.Originallyapproved in 1973.Last previous edition approved in 2011 as D3203/D3203M 11.DOI:10.1520/D3203_D3203M-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 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 6.Procedure6.1 For dense asphalt mixtures,determine the bulk