1、Designation:D749611Standard Test Method forViscosity of Emulsified Asphalt by Saybolt FurolViscometer1This standard is issued under the fixed designation D7496;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 utilizes the Saybolt Furol viscometer tomeasure the consistency of emulsified asphalt.It is applicableto all the emulsi
3、fied asphalts specified in Specifications D977and D2397.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsi
4、bility 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:2D88 Test Method for Saybolt ViscosityD244 Test Methods and Practices for Emulsified AsphaltsD977
5、 Specification for Emulsified AsphaltD2397 Specification for Cationic Emulsified AsphaltE1 Specification for ASTM Liquid-in-Glass ThermometersE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Significance and Use3.1 Viscosity has significance in the use of emulsifiedasphalt because i
6、t is a property which affects their utility.Whenused in application types of construction,the material must bethin enough to be uniformly applied through the spray bar ofdistributor,yet thick enough so that it will not flow from thecrown or grade of the road.For mixing grade emulsions,theviscosity m
7、ay affect mixibility and resulting thickness of filmon the aggregate.The viscosity of many emulsions is affectedby shear.Therefore,strict adherence to test procedure isnecessary to achieve precision.4.Sample Conditioning for Testing4.1 All emulsified asphalts shall be properly stirred toachieve homo
8、geneity before testing.4.2 All emulsified asphalts with the viscosity testing re-quirements of 50C shall be heated to 50 6 3C in the originalsample container in a water bath or oven.The container shouldbe vented to relieve pressure.After the sample reaches 50 63C,stir the sample to achieve homogenei
9、ty.4.3 Emulsified asphalts with a viscosity testing require-ments to 25C should be mixed or stirred at 25 6 3C in theoriginal sample container to achieve homogeneity.NOTE1Emulsified asphalts with viscosity testing requirements of25C may be heated and stirred as specified in 4.2,if necessary.In theev
10、ent the 4.2 method is used,the sample should be cooled to 25 6 3Cbefore testing.5.Apparatus5.1 ViscometerA Saybolt Furol viscometer conforming tothe requirements specified in Test Method D88.5.2 SieveA850-m sieve or a 20-mesh strainer of wirecloth,framed or unframed.Refer to Specification E11.5.3 Th
11、ermometersASTM No.17C or 17F for tests at 25C(77F)and ASTM No.19C or 19F for tests at 50C(122F),conforming to the requirements of Specification E1,or anyother thermometric device of equal accuracy.5.4 Water Bath or Oven,capable of maintaining the requiredtesting temperature within the limits specifi
12、ed in Table 2 ofTest Method D88.5.5 Receiving Flask,as shown in Test Method D88.6.Hazards6.1 WarningMercury has been designated by EPA andmany state agencies as a hazardous material that can causecentral nervous system,kidney and liver damage.Mercury,orits vapor,may be hazardous to health and corros
13、ive tomaterials.Caution should be taken when handling mercury andmercury containing products.See the applicable product Ma-terial Safety Data Sheet(MSDS)for details and EPAs website1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct respons
14、ibility of Subcommittee D04.42 onEmulsified Asphalt Test.Current edition approved Dec.1,2011.Published January 2012.Originallypublished 2009 as D749609.DOI:10.1520/D7496-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annua
15、l 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(www.epa.gov/mercury/faq.htm)for additional information.Users should be aware that s
16、elling mercury or mercurycontaining products(or both)into your state may be prohibitedby state law.7.Procedure7.1 Tests at 25C(77F)Clean and dry the viscometer andinsert the stopper or cork.Follow either Procedure A or Bbelow:7.1.1 Procedure APour approximately 100 mL of theemulsified asphalt into a 400 mL glass beaker.Immerse bottomof the beaker containing the emulsified asphalt approximately50 mm(2 in.)below the level of a 25C(77F)water bath.Hold the beaker upright and stir the emulsified asph
