ASTM_D_7196_-_12.pdf

Designation:D719612Standard Test Method forRaveling Test of Cold Mixed Emulsified Asphalt Samples1This standard is issued under the fixed designation D7196;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 test method measures the resistance to ravelingcharacteristics of emulsified asphalt and field aggregates orRecycled Asphalt Pavement(RAP)mixtures by simulating anabrasion similar to early return to traffic.1.2 The values stated in SI units are to be regarded as thestandard unless otherwise indicated.1.3 A precision and bias statement for this standard has notbeen developed at this time.Therefore,this standard should notbe used for acceptance or rejection of a material for purchasingpurposes.1.4 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:2D75 Practice for Sampling AggregatesD977 Specification for Emulsified AsphaltD979 Practice for Sampling Bituminous Paving MixturesD2379 Test Method for Acidity of Formaldehyde SolutionsD3910 Practices for Design,Testing,and Construction ofSlurry SealD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD6372 Practice for Design,Testing,and Construction ofMicro-SurfacingD6925 Test Method for Preparation and Determination ofthe Relative Density of Hot Mix Asphalt(HMA)Speci-mens by Means of the Superpave Gyratory Compactor2.2 ISSA Document:ISSATechnical Bulletin No.100 Test Method for Wet TrackAbrasion of Slurry Surfaces3.Summary of Test Method3.1 An aggregate and/or RAP is mixed together with apreset amount of additives(if shown to be necessary),water(ifnecessary)and emulsified asphalt.This may be a field blendedmixture(Method A)or a laboratory blended mixture(MethodB).The mixture is compacted in a gyratory compactor andcured at the specified conditions for a designated period oftime.After the assigned curing time,a rotating rubber hoseexerts an abrasion force on the specimen for a preset timeperiod and the abraded loss of material is calculated.4.Significance and Use4.1 This test is useful for classifying the curing and formu-lation of cold mixed emulsified asphalt samples through raveltesting of compacted specimens.This performance test shouldbe used to rank the mix conditions and approximate curingtime for return to traffic and resistance to weather damage.5.Apparatus5.1 Hobart MixerThe13H.P.Fixed Speed Motor,modelA 120 will be used to abrade the sample.5.2 Raveling Test Adapter BaseThis base must fit theHobart mixer in 5.1 and be an adequate and level support forclamping the test specimen in place.The test specimen shouldnot move during abrasion.A picture of the base can be seen inFig.1.NOTE1A Raveling Test Adapter Base meeting the requirements canbe purchased from Precision Machine and Welding,Salina,Kansas,(785)823-8760.5.3 Raveling Test Abrasion Head with HoseThe abrasionhead should be free floating over the sample and have a massof 600 6 15 g.This mass shall include the rubber hose.Therubber hose shall be a Parker 290 Ozex General Purpose Hoseor equivalent.The hose shall be 19 mm ID by 6.25 mm wallthickness(34in.ID by14in.wall thickness)and cut to 127 mm(5 in.)in length.The rubber hose shall be easily removed sothat it may be rotated or changed prior to testing to insure aclean surface for abrasion.NOTE2An abrasion head similar to that used in the Wet TrackAbrasion of Slurry Surfaces(Practices D3910,D6372,and ISSATB-100)1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.27 onCold Mix Asphalts.Current edition approved Dec.1,2012.Published December 2012.Last previousedition published 2006 as D719606.DOI:10.1520/D7196-12.2For 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 may meet the requirements with the ring weight removed.An abrasionhead meeting these requirements can be purchased from PrecisionMachine and Welding,Salina,Kansas,(785)823-8760.5.4 Oven or Environmental ChamberIf required for otherthan ambient laboratory curing conditions,the oven shall be aconstant temperature forced draft oven.The shelves in the ovenshall be placed at least 150 mm apart and 100 mm away fromthe to