1、Designation:D166598(Reapproved 2014)Standard Test Method forEngler Specific Viscosity of Tar Products1This standard is issued under the fixed designation D1665;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision
2、.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 covers the determination of specificviscosity of tars and their fluid products.It does not determineabsolute viscosity,
3、but is an empirical flow test.Only byconforming strictly to requirements of the test method arereproducible results obtained.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
4、 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:2D140 Practice for Sampling B
5、ituminous MaterialsE1 Specification for ASTM Liquid-in-Glass ThermometersE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 Definitions:3.1.1 Engler specific viscositythe ratio obtained by divid-ing the time of flow,in s,of 50 mL of material using an Englerviscosimeter
6、at a selected temperature by a factor representingthe time of flow,in s,for an equal volume of water at 25C.Theusual temperatures for determination of specific viscosity of tarmaterials are 25C,40C,50C,and 100C,and generally thetemperature is so selected that the specific viscosity is not morethan 4
7、5.4.Summary of Test Method4.1 The time,in s,is measured for a fixed volume of liquidmaterial to flow through an efflux tube under an accuratelyreproducible head and at a closely controlled temperature.TheEngler specific viscosity is then calculated by dividing theefflux time by the viscometer calibr
8、ation factor as determinedby making the same efflux measurement for water.5.Significance and Use5.1 This test method is useful in characterizing the consis-tency of tar and tar distillates by measuring their flow proper-ties.It is applicable to materials that are readily liquid attemperatures up to
9、100C.6.Apparatus6.1 Engler Viscosimeter as shown in Fig.1,consisting of thefollowing:6.1.1 CupThis is a gold-plated cylindrical brass vessel of106.0 6 1.0 mm,A,inside diameter,closed at the top by adouble walled lid.To the rounded bottom is attached ametal-encased tapered platinum efflux tube 20.0 6
10、 0.1 mm,H,long with an inside diameter of 2.90 6 0.02 mm,E,at the topand 2.80 6 0.02 mm,F,at the bottom.The efflux tube shallproject through and extend 3.0 6 0.2 mm,G,below a jacketthat surrounds the cup and shall have a bottom outsidediameter,including its surrounding metal,of 4.5 6 0.2 mm,I.Three
11、metal measuring points,spaced equidistantly around thecircumference of the cup,are fastened to the sides and extendinwardly approximately 7 mm,then turn up at a right angle andend in sharp points which are located 52.0 6 0.5 mm,D,vertically above the lower end of the efflux tube and 25.0 6 1.0mm,C,a
12、bove the lowest portion of the cylindrical sidewall ofthe cup.They serve both for indicating when the instrument islevel and for measuring the charge of material,which isapproximately 250 mL.6.1.2 JacketThe cup is surrounded by a jacket whichholds water or other suitable liquid serving as a constant
13、temperature bath.In the type illustrated,the jacket is providedwith a thermometer clamp and stirring device.A tripodsupports the apparatus and also carries a ring burner by meansof which the bath is heated.Adjustable legs on the tripod serveto level the instrument.Other arrangements of outer baths,1
14、This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.43 onSpecifications and Test for Tar and Tar Products.Current edition approved June 1,2014.Published October 2014.Originallyapproved in 1959.Last previous
15、 edition approved in 2009 as D1665 98(2009).DOI:10.1520/D1665-98R14.2For 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 websit
16、e.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 supports,and stirring devices are acceptable,especially when itis desired to use more than one standardized cup in a singlebath.6.1.3 StopperThe efflux tube in the cup is closed oropened by the insertion or withdrawal of a tapered hardwoodstopper which,to leave the tube open,can be suspended by itsbrass pin from the hook on the cover.The stopper shall be asmooth,round,wooden rod 180 mm
