ASTM_D_3628_-_15_2021.pdf

Designation:D362815(Reapproved 2021)Standard Practice forSelection and Use of Emulsified Asphalts1This standard is issued under the fixed designation D3628;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.1.Scope1.1 This practice covers the selection of emulsified asphaltsfor various paving and allied uses.1.2 The values stated in SI units are to be regarded asstandard.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,health,and environmental practices and deter-mine the applicability 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:2D8 Terminology Relating to Materials for Roads and Pave-mentsD977 Specification for Emulsified AsphaltD2397/D2397M Specification for Cationic Emulsified As-phalt3.Terminology3.1 For definitions of terms used in this practice,refer toTerminology D8.3.2 Definitions of Terms Specific to This Standard:3.2.1 asphalt-aggregate applicationsapplications ofemulsified asphalt to a prepared aggregate base or pavementsurface followed by the application of aggregate.3.2.2 asphalt-aggregate mixturesa combination of emul-sified asphalt and aggregate that is physically mixed bymechanical means,spread on the job site,and compacted.3.2.3 asphalt applicationsthe application of sprayedemulsified asphalt not involving the use of aggregates.3.2.4 graded aggregate seal,na single surface treatmentin which the aggregate is graded with little or no mineral filler,typically with a nominal maximum size of about 19 mm,andcontaining sufficient sand that the emulsified asphalt will berequired to penetrate upward into the aggregate cover;thenominal maximum aggregate size may vary depending on thecourse thickness desired and aggregate availability.It is anapplication method used in lieu of a chip seal to provide alower cost road.3.2.4.1 DiscussionIn this case,nominal maximum sizerefers to the definition in Terminology D8.3.2.5 multiple surface treatmenttwo or more single sur-face treatments placed one on the other.The maximumaggregate size of each successive treatment is usually one halfthat of the previous one,and the total thickness is about thesame as the nominal maximum size aggregate particles of thefirst course.3.2.6 pavement bases and surfacesthe lower or underly-ing pavement course atop the subbase or subgrade and the topor wearing course.Cold-laid mixtures that are bound togetherwith emulsified asphalts use either open or dense aggregategradations.3.2.7 sanda mineral aggregate material consisting of par-ticles of rock passing a 4.75-mm sieve and only about 5%passing the 75-m sieve.3.2.8 sand seala bituminous-sand application to an exist-ing pavement surface to seal the surface and to function as alight-wearing course.3.2.9 sandy soila material consisting essentially of fineaggregate particles smaller than 2.00-mm sieve and usuallycontaining material passing a 75-m sieve.This materialusually exhibits plasticity characteristics.3.2.10 single-surface treatment(chip seal)a wearing sur-face of emulsified asphalt and aggregate in which the aggregateis placed uniformly over the applied emulsified asphalt in asingle layer,the thickness of which approximates the nominalmaximum size of the aggregate used.1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of D04.41 on Emulsified AsphaltSpecifications.Current edition approved Jan.1,2021.Published January 2021.Originallyapproved in 1978.Last previous edition approved in 2015 as D3628 15.DOI:10.1520/D3628-15R21.2For 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.13.2.11 treatments and sealsa bituminous aggregate appli-catio