D6929-10 Standard Practice For Freezing of Emulsified Asphalts PDF

 

 

Designation: D6929  −  10

Standard Practice for

Freezing of Emulsified Asphalts1 This standard is issued under the fixed designation D6929; the number immediately following the designation indicates the year of  original origin al adoption or, in the case of revis revision, ion, the year of last revision. revision. A number in paren parenthese thesess indicates the year of last reappr reapproval. oval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

1. Sco Scope pe

NOTE   1—Emulsified 1—Emulsified asphalts with viscos viscosity ity testin testing g requi requiremen rements ts of  25°C may be heated and stirred as specified in   3.2 3.2,,  if necessary. In the event the 3.2 the  3.2  method is used, the sample should be cooled to 25   6  3°C.

1.1 Emulsified Emulsified asp asphal haltt is nor normall mally y dam damage aged d by fre freezin ezing g temperatures, but specially formulated materials are expected to pass this practice.

4. Appar Apparatus atus

1.2 Th 1.2 Thee va valu lues es sta state ted d in SI un units its are to be re rega gard rded ed as standard. No other units of measurement are included in this standard.

4.1   Freezer— Capable Capable of maintaining a test temperature of  -1865°C. 4.2   Metal Container— such such as a 500 mL press-top can.

1.3   This This pra practic cticee doe doess not purport purport to add addre ress ss all of the safet sa fetyy co conc ncer erns ns,, if an anyy, as asso socia ciated ted wi with th it itss us use. e. It is th thee responsibility of the user of this standard to establish appro priate safety and health practices and determine the applicability of regulatory limitations prior to use.

4.3  Glass Stirring Rod— of of optional size. 5. Pro Procedu cedure re 5.1 Place approximatel approximately y 400 g of the emulsified asphalt asphalt in a clean metal container. 5.2 Expos Exposee the emulsified asphalt asphalt in the closed container container to an air temperature of −18   6   5°C for 12 to 18 consecutive hours.

2. Sign Significan ificance ce and Use 2.1 Certain agencies, agencies, who desire to use, store, or transp transport ort emulsified emulsifi ed aspha asphalt lt under less than ideal weathe weatherr condi conditions, tions, may requir requiree that the prod product uct remain homogeneous homogeneous (unbroken) (unbroken) after being subjected to temperatures of −18°C.

5.3 5. 3 At th thee ex expi pira ratio tion n of th thee fr free eezin zing g pe peri riod od,, pe perm rmit it th thee emulsified emulsifi ed asp asphal haltt to thaw by exp exposu osure re of the container container to ambient temperature.

3. Samp Sample le Conditioning Conditioning

5.4 Repeat 5.4 Repeat th thee fr freez eezin ing g an and d th thaw awin ing g pe perio riods ds until until th thee emul em ulsifi sified ed asp aspha halt lt ha hass be been en su subj bjec ected ted to th thre reee cy cycl cles es of  freezing and thawing.

3.1 Al 3.1 Alll em emul ulsifi sified ed as asph phalt altss sh shal alll be pr prop oper erly ly sti stirr rred ed to achieve homogeneity. 3.2 All emulsified asphalts with viscos viscosity ity testing requirements of 50°C shall be heated to 50   6   3°C in the original sample container in a water bath or oven. The container should be vented to relieve pressure. After the sample reaches 50   6 3°C, stir the sample to achieve homogeneity.

5.5 Af 5.5 After ter th thee th thir ird d cy cycle cle,, th thee em emul ulsifi sified ed as asph phalt alt may be homogeneous or may have separated into distinct layers which cannot can not be ren render dered ed hom homoge ogeneo neous us by stir stirrin ring g at lab labora orator tory y temperature.

3.3 Emulsi Emulsified fied asphalts with viscosity testing requirements requirements of 25°C should be mixed or stirred at 25   6 3°C in the original sample container to achieve homogeneity.

6. Repor Reportt 6.1 Report the result result of this practice practice as either Homogeneous or   Broken.

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This practice is under the jurisdiction of ASTM Committee  D04  D04 on  on Road and Paving Mater Paving Materials ials and is the direct respon responsibil sibility ity of Subco Subcommitte mmitteee   D04.42   on Emulsified Asphalt Test. Current Curre nt editio edition n appro approved ved Dec. 1, 2010. Published Published March 2011. Originally Originally approved 2004 as D6929–04. DOI: 10.1520/D6929-10

7. Keyw Keywords ords 7.1 asphal asphalt; t; asphal asphaltt emulsio emulsion; n; cation cationic ic emulsifi emulsified ed asphalt; emulsified emulsi fied aspha asphalt; lt; freezin freezing; g; frost

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D6929 − 10

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