1、Designation: D7173 11Standard Practice forDetermining the Separation Tendency of Polymer fromPolymer Modified Asphalt1This standard is issued under the fixed designation D7173; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the ye
2、ar 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 practice describes a laboratory procedure for de-termining the tendency of polymer to separate from polymer
3、modified asphalt under static heated storage conditions. Theresults of testing on material prepared according to this practicemay be used as a guideline when formulating products or toestablish field handling procedures. Large differences in testresults between top and bottom specimens indicate that
4、 there isa degree of incompatibility between the polymer and the baseasphalt.1.2 The values stated in SI units are to be regarded as thestandard. 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 wit
5、h its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and to determine theapplicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D36 Test Method for Softening Point of Bitumen (Ring-and-Ball Appa
6、ratus)D7175 Test Method for Determining the Rheological Prop-erties of Asphalt Binder Using a Dynamic Shear Rheom-eter3. Summary of Practice3.1 A measured quantity of polymer modified asphalt in asealed aluminum tube is conditioned in a vertical position for48 h at a temperature of 163 6 5C. At the
7、end of theconditioning period, top and bottom portions are separated andsubjected to further testing to determine the degree of separa-tion. Tests chosen for this purpose depend on the polymermodification system being evaluated and the type of informa-tion desired by the user. Softening Point (Test
8、Method D36)and DSR (Test Method D7175) are the most common testsused for this purpose.4. Significance and Use4.1 Purchasers of polymer modified asphalt need to be givenguidelines on proper storage and handling procedures tomaintain the integrity of material they have purchased. Thispractice provides
9、 a significant tool for understanding thecharacteristics of these materials as well as comparing varioussources of supply.5. Apparatus5.1 Aluminum Tubes25-mm diameter by 125-mm to140-mm length aluminum separation tubes, used to hold thetest sample during conditioning.35.2 BalanceCapable of being rea
10、d to the nearest 0.1 g.5.3 OvenCapable of maintaining a temperature of 163 65C.5.4 FreezerCapable of maintaining a temperature of -106 10C.5.5 RackCapable of supporting the aluminum tubes in avertical position in the oven and freezer.5.6 ContainersMetal or glass, 100 6 20-mL capacity.5.7 Hammer and
11、Cutting ToolThe cutting tool must berigid and sharp to allow cutting of the tube containing thesample when at a low temperature.NOTE 1A tool known as a 6-in-1 painters tool has been found idealfor this purpose.6. Procedure6.1 Place the empty aluminum tube in the rack, with sealedend down, or support
12、 it some other way in a vertical position.1This practice is under the jurisdiction of ASTM Committee D04 on Road andPaving Materials and is the direct responsibility of Subcommittee D04.47 onMiscellaneous Asphalt Tests.Current edition approved June 1, 2011. Published July 2011. Originally pub-lished
13、 2005. Last previous version approved 2005 as D717305. DOI: 10.1520/D7173-11.2For 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 ont
14、he ASTM website.3Aluminum tubes suitable for this purpose may be obtained from R/H Specialtyfrom HMA Lab Supply, 3407 W. Leigh St., Richmond VA 23230,(888) 569-0499, as Part No. SC-4000; or from Freund Container, 11535 S. CentralAve., Alsip, IL, (800) 363-9822 as Part No. AC15. If you are aware of a
15、lternativesuppliers, please provide this information to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee,1which you may attend.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1
16、9428-2959, United States.6.2 If the sample is not already hot, heat it in the oven at 1636 5C until sufficiently fluid to pour. Stir the sample thor-oughly and pour 50 6 0.5 g into the vertically held tube.Depending on the type of tube used, either fold the excess tubeover two times and crimp tightl
17、y, screw on the cap, insert acork stopper wrapped in aluminum foil, or seal it in some otherway to prevent the introduction of air.6.3 Place the sealed tube assembly in the 163 6 5C oven(other temperatures may be used if deemed more appropriateby all parties). Allow the tube to stand undisturbed in
18、the ovenfor a period of 48 6 1 h. At the end of the conditioning period,remove the tube from the oven, and place it immediately in thefreezer at -10 6 10C, taking care to keep the tube in a verticalposition at all times. Leave the tube in the freezer for aminimum of4htosolidify the sample completely
19、.6.4 Remove the tube from the freezer and place it on a hardflat surface. Cut the section of the tube containing the specimeninto three portions of approximately equal length. A hammerand cutting tool is normally used, but other means areappropriate if they can make a clean separation. Discard thece
20、nter asphalt section, and place the top and bottom portions ofthe tube into separate covered 100 6 20-mL containers. Placethe covered containers in the 163 6 5C oven until the asphaltis sufficiently fluid to remove the pieces of the aluminum tube,but not longer than 30 minutes.6.5 Stir the samples t
21、horoughly before pouring them up forcomparative testing of the top and bottom portions.7. Keywords7.1 Modified asphalt; polymer; separation; storageASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users
22、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 their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every fi
23、ve years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical
24、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 Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, P
25、A 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 ASTM website (www.astm.org/COPYRIGHT/).D7173 112
