ASTM_D_3628_-_15.pdf

Designation:D362815Standard 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D8 Terminology Relating to Materials for Roads and Pave-mentsD977 Specification for Emulsified AsphaltD2397 Specification for Cationic Emulsified Asphalt3.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 bituminous-aggregate applicationsapplications ofemulsified asphalt to a prepared aggregate base or pavementsurface followed by the application of aggregate.3.2.2 bituminous-aggregate mixturesa combination ofemulsified asphalt and aggregate that is physically mixed bymechanical means,spread on the job site,and compacted.3.2.3 bituminous 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.3.2.11 treatments and sealsa bituminous aggregate appli-cation to any type of road or pavement surface for the purposeof providing a wearing course,or a surface seal,or both.4.Significance and Use4.1 As indicated by Specifications D977 and D2397,emul-sified asphalts are classified by type(rapid medium or slow1This 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 Dec.1,2015.Published January 2016.Originallyapproved in 1978.Last previous edition approved in 2008 as D3628 08.DOI:10.1520/D3628-15.2For 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 States1 setting)and by grade within type(viscosity in the case of therapid-setting type or characteristic of the residual asphalt in thecase of the medium and slow-setting types).Selection for useof a particular type and grade is controlled by type ofconstruction(whether an application or a mix type),propertiesof the mineral aggregate(both grading and mineralcomposition),and environmental conditions during construc-tion.For