1、Designation:D402/D402M14American Association StateHighway and Transportation Officials StandardAASHTO No.:T7827/74(88)Standard Test Method forDistillation of Cutback Asphalt1This standard is issued under the fixed designation D402/D402M;the number immediately following the designation indicates the
2、yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a distillation test for cutbackasp
3、halts.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewit
4、h the standard.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.R
5、eferenced Documents2.1 ASTM Standards:2D86 Test Method for Distillation of Petroleum Products atAtmospheric PressureD370 Practice for Dehydration of Oil-Type PreservativesE1 Specification for ASTM Liquid-in-Glass ThermometersE77 Test Method for Inspection and Verification of Ther-mometersE133 Specif
6、ication for Distillation EquipmentE220 Test Method for Calibration of Thermocouples ByComparison TechniquesE644 Test Methods for Testing Industrial Resistance Ther-mometersE1137 Specification for Industrial Platinum Resistance Ther-mometers3.Summary of Method3.1 Two hundred millilitres of the sample
7、 are distilled in a500-mLflask,at a controlled rate,to a temperature in the liquidof 360C 680F,and the volumes of distillate obtained atspecified temperatures are measured.The residue from thedistillation,and also the distillate,may be tested as required.4.Significance and Use4.1 This procedure meas
8、ures the amount of the more vola-tile constituents in cutback asphalt.The properties of theresidue after distillation are not necessarily characteristic of thebitumen used in the original mixture,nor of the residue whichmay be left at any particular time after field application of thecutback asphalt
9、.The presence of silicone in the cutback asphaltmay affect the distillation residue by retarding the loss ofvolatile material after the residue has been poured into theresidue container.5.Apparatus5.1 Distillation Flask,500-mL side-arm,having the dimen-sions shown in Fig.1.5.2 Condenser,standard gla
10、ss-jacketed,of nominal jacketlength from 200 to 300 mm and overall tube length of 450 610 mm(see Fig.3).5.3 Adapter,heavy-wall(1-mm)glass,with reinforced top,having an angle of approximately 105.The inside diameter atthe large end shall be approximately 18 mm,and at the smallend,not less than 5 mm.T
11、he lower surface of the adapter shallbe on a smooth descending curve from the larger end to thesmaller.The inside line of the outlet end shall be vertical,andthe outlet shall be cut or ground(not fire-polished)at an angleof 45 6 5 to the inside line.5.4 Shield,steel,lined with 3-mm fire proof insula
12、tion andfitted with transparent mica windows,of the form and dimen-sions shown in Fig.2,used to protect the flask from air currentsand to reduce radiation.The cover(top)shall be made in twoparts of 6.4-mm fire proof insulation.5.5 Shield and Flask SupportTwo 15-cm2sheets of 16-mesh Chromel wire gauz
13、e on a tripod or ring.1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.46 onDurability and Distillation Tests.Current edition approved June 1,2014.Published August 2014.Originallyapproved in 1934.Last p
14、revious edition approved in 2008 as D402 08.DOI:10.1520/D0402_D0402M-14.2For 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 we
15、bsite.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.6 Heat Source:5.6.1 Adjustable Tirrill-type gas burner or equivalent.5.6.2 An electric heater equipped with a transformer ca-pable of controlling from 0 to 750 W.The shield and suppo
16、rtshall be a refractory with an opening of 79 mm,with the uppersurface beveled to 86 mm to accommodate the specified500-mL flask.When the flask is placed on the refractory,thereshould be a distance of approximately 3 mm between thebottom of the flask and the heating elements.5.7 ReceiverA standard 100-mL graduated cylinder con-forming to dimensions of Specification E133,or a 100-mLCrow receiver as shown in Fig.4 of this test method.NOTE1Receivers of smaller capacity having 0.1-mLdivisions may be
