1、Designation: D6934 08 (Reapproved 2016)Standard Test Method forResidue by Evaporation of Emulsified Asphalt1This standard is issued under the fixed designation D6934; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 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 covers the quantitative determinationof residue in emulsified asphalts composed principally of asemisolid
3、 or liquid asphaltic base, water, and an emulsifyingagent.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 theres
4、ponsibility 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:2D6997 Test Method for Distillation of Emulsified AsphaltE11 Specification for Woven Wire T
5、est Sieve Cloth and TestSieves3. Significance and Use3.1 The test may be used to indicate compositional charac-teristics of emulsified asphalt. Evaporation residue may also besubjected to other characterization tests.3.2 This test method for residue by evaporation tends togive an asphaltic residue l
6、ower in penetration and ductility thanthe distillation test method (D6997). Material may be acceptedbut shall not be rejected as failing to meet specificationscontaining requirements for determination of residue bydistillation, on data obtained by evaporation. If residue fromevaporation fails to mee
7、t the requirements for propertiesspecified for residue from distillation, tests shall be rerun usingthe distillation test method.4. Summary of Method4.1 A sample of emulsified asphalt in an open top beaker isheated in an oven at 163 6 3C to determine the percentage ofasphalt residue. The residue fro
8、m the evaporation may betested as required.5. Sample Conditioning for Testing5.1 All emulsified asphalts shall be properly stirred toachieve homogeneity before testing.5.2 All emulsified asphalts with viscosity testing require-ments of 50C shall be heated to 50 6 3C in the originalsample container i
9、n a water bath or oven. The container shouldbe vented to relieve pressure. After the sample reaches 50 63C, stir the sample to achieve homogeneity.5.3 Emulsified asphalts with viscosity testing requirementsof 25C should be mixed or stirred at 25 6 3C in the originalsample container to achieve homoge
10、neity.NOTE 1Emulsified asphalts with viscosity testing requirements of25C may be heated and stirred as specified in 5.2 if necessary. In theevent the 5.2 method is used, the sample should be cooled to 25 6 3Cbefore testing.6. Apparatus6.1 Beakerslow form, 1000-mL capacity, made of glass ormetal.6.2
11、Glass Rodswith flame-polished ends, approximately 6mm in diameter and approximately 180 mm in length.6.3 Balancecapable of weighing 500 g to within 0.1 g.6.4 OvenCapable of maintaining a temperature of 163 63C.6.5 SieveA 76.2-mm diameter 300-m sieve conformingto Specification E11.7. Procedure A7.1 U
12、se Procedure A when determination of the percentageof residue only is required.7.2 Determine the weight of each of three beakers contain-ing a glass rod to 0.1 g. Weigh 50 6 0.1 g of thoroughly mixed,emulsified asphalt into each of three beakers.7.3 Place the beakers containing the rods and sample i
13、n theoven, which has been adjusted to 163 6 3.0C, for 2 h. At the1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and are the direct responsibility of Subcommittee D04.42 onEmulsified Asphalt Test.Current edition approved May 1, 2016. Published May 2016.
14、Originallyapproved in 2004. Last previous edition approved in 2008 as D6934 08. DOI:10.1520/D6934-08R16.2For 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 standard
15、s Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1end of this period remove each beaker and stir the residuethoroughly. Replace in the oven for 1 h, then remove thebeakers from the oven, allow
16、to cool to room temperature, andweigh with the rods.NOTE 2Exercise care to prevent loss of asphalt from the beakerthrough foaming or spattering, or both. It is permissible for the technicianto observe the beakers periodically and prevent boilover by stirring thesample. The placing of beakers and emu
17、lsified asphalt samples in a coldor warm oven and bringing the oven and sample up to a temperature of163C together is also permissible.NOTE 3If preferred, preliminary evaporation of water may beaccomplished by careful heating on a hot plate, followed by oventreatment at 163C for 1 h.8. Procedure B8.
18、1 Use Procedure B when tests on the residue from theemulsified asphalts are required.8.2 Proceed in accordance with 7.2 and 7.3 using four 50 60.1 g samples. After the calculation for percentage of residue,replace the beakers in the oven until the asphalt residue issufficiently fluid to pass through
19、 a 300-m sieve (usuallyrequiring 15 to 30 min). Pour the residue through the 300-msieve into suitable containers and molds for residue testing.9. Calculation and Report9.1 Calculate the percentage of residue on each beaker asfollows:residue, % 5 2A 2 B! (1)where:A = weight of beaker, rod, and residu
20、e, g; andB = tare weight of beaker and rod, g.9.2 Report the percentage of residue by evaporation as theaverage of all the beakers tested provided the maximumdifference in the measurements is less than or equal to 0.4 %.If any of the measured values differs by more than 0.4 % fromthe other measured
21、values, that data point should be rejected inthe calculation and the average of the remaining data pointsshould be reported.10. Precision and Bias10.1 The following criteria should be used for judging theacceptability of results (95 % probability):10.1.1 Duplicate results by the same operator should
22、 not beconsidered suspect unless they differ by more than the follow-ing amount:Residue by Evaporation, Repeatability, weight %weight %50 to 70 0.410.1.2 The results submitted by each of two laboratoriesshould not be considered suspect unless they differ by morethan the following amount:Residue by E
23、vaporation, Reproducibility, weight %weight %50 to 70 0.810.2 The bias of this test method cannot be determinedbecause no material having an accepted reference value isavailable.11. Keywords11.1 asphalt; asphalt emulsion; cationic emulsified asphalt;emulsified asphalt; evaporation; residueASTM Inter
24、national takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely
25、their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand shou
26、ld be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Stan
27、dards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 08 (2016)2
