1、Designation: D6704 08 (Reapproved 2015)Standard Test Method forDetermining the Workability of Asphalt Cold Mix PatchingMaterial1This standard is issued under the fixed designation D6704; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, the year 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 test method provides a procedure for determinationof the workability of asphalt cold mix patching
3、 materials.1.2 This test method is applicable to asphalt cold mixpatching materials that will be stockpiled or packaged incontainers, subjected to different climatic conditions, and laterused for roadway patching operations.1.3 The within-laboratory repeatability standard deviationhas been determine
4、d to be 10 % based on one lab, three testreplicates, and two different samples. The between-laboratoryreproducibility of this test method is being determined and willbe available on or before August 2013. Therefore, this testmethod should not be used for purchasing purposes.1.4 The values stated in
5、SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.5 This procedure may involve hazardous materials,operations, and equipment. This standard does not purport toaddress all of the safety concerns, if any, associated with itsuse. It is the responsibili
6、ty of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C702 Practice for Reducing Samples ofAggregate to TestingSizeD8 Terminology Relating to Materials for
7、 Roads and Pave-mentsD75 Practice for Sampling AggregatesD3665 Practice for Random Sampling of Construction Ma-terialsD4753 Guide for Evaluating, Selecting, and Specifying Bal-ances and Standard Masses for Use in Soil, Rock, andConstruction Materials TestingD5581 Test Method for Resistance to Plasti
8、c Flow of Bitu-minous Mixtures Using Marshall Apparatus (6 inch-Diameter Specimen)3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 workabilitythe average maximum resistance to pen-etration by a designated penetrometer into a compacted asphaltcold mix that is confined in a desig
9、nated box.3.2 Definitions for other terms used in this test method maybe found in Terminology D8 or a standard unabridged diction-ary.4. Summary of Test Method4.1 This test method is used to determine the relative valuefor workability of an asphalt cold mix patching material to beused under differen
10、t climatic conditions.4.2 Cold patching samples are obtained from the asphaltcold mix stockpile or removed from its container, cooled to aspecified temperature, and measured for workability.5. Significance and Use5.1 This test method may be used to generate informationconcerning the potential charac
11、teristics of handling, placing,compaction, and performance of an asphalt cold mix.5.2 Workability is one of the main factors that influences thesuitability and ultimately the performance of asphalt cold mixsuitability for use as a roadway patching material.5.3 This test method is applicable to aspha
12、lt cold mixesmanufactured with modified or unmodified asphalt emulsions,cutback asphalts, or combinations thereof.6. Interferences6.1 Differences in the aggregate gradation, size, shape, andsurface properties, and the residual asphalt binder can signifi-cantly affect the workability test method valu
13、es.1This test method is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.27 onCold Mix Asphalts.Current edition approved June 1, 2015. Published July 2015. Originally approvedin 2001. Last previous edition approved in 2008
14、as D6704 08. DOI: 10.1520/D6704-08R15.2For 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 website.Copyright ASTM Internat
15、ional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16.2 Procedure variances can affect the values obtained.Careful adherence to this test method will decrease thelikelihood of differences caused by departures from procedureparameters.7. Apparatus7.1 Freezer, ca
16、pable of maintaining a temperature of 10 61C.7.2 Balance, conforming to the requirements of Specifica-tion D4753, Class GP5.7.3 Boxes, three square workability boxes or other similarmolds, constructed to measure 165 by 165 by 50-mm deepinside dimensions and sufficiently rigid for forming and mea-sur
17、ing the asphalt cold mix specimens (Fig. 1).7.4 Compaction Hammer, specified in Test Method D5581with a flat tamping foot (Fig. 2) of 150 by 150 by 6-mm thickattached to the bottom of the hammer and a 4536-g slidingweight with a free fall of 457.2 mm.7.5 Compression Testing Machine, as specified in
18、TestMethod D5581 and modified as necessary to provide at least 45s of loading.NOTE 1Instead of the compression testing machine, any suitableload-measuring device may be used provided capacity and sensitivitymeet the above requirements.7.6 Blade, a flat steel penetration blade (Fig. 3) measuring130 m
19、m wide, 50 mm in height and 3 mm thick attached to theadapter at the bottom of the proving ring.7.7 Utensils, for handling and transferring mixture samples.8. Hazards8.1 Observe standard laboratory safety precautions whenpreparing and measuring cold mix asphalt specimens.9. Sampling9.1 Obtain field
20、samples in accordance with PracticeD3665.9.2 Alternate 1, Stockpile or Packaged Material:9.2.1 After stirring the stockpile, obtain 3 samples in accor-dance with Practice D75 or obtain 3 samples from thecontainer.NOTE 2Asphalt cold mixes that are in stockpile for some time maydevelop a crust on the
21、surface of the pile. This crust should be removed toa depth of 100 mm, over an area of 1 m2, to expose the unweathered mix.9.2.2 Use standard quartering procedures as detailed inPractice C702 to obtain a 2500 6 100-g laboratory samplefrom each of the 3 field samples.9.3 Alternate 2, Plant Mixed Mate
22、rial:9.3.1 Obtain 3 samples in accordance with Practice D3665,of cold mix from the material proposed for use.9.3.2 Use standard quartering procedures as detailed inPractice C702 to obtain a 2500 6 100-g laboratory samplefrom each of the 3 field samples.10. Standardization10.1 Verify calibration of t
23、he freezer.11. Procedure11.1 Workability:11.1.1 Allow the material to stabilize at ambient laboratorytemperature (25 6 3C).11.1.2 Weigh the material in three separate boxes theamount (about 2 kg) that will result in a compacted specimenheight of 48 to 50 mm.11.1.3 Spread the mix uniformly over the b
24、ox and level themix, avoiding any segregation. Discard any excess material.11.1.4 Place the box with the material on any hard and levelsurface, and place the compaction hammer with the modifiedfoot close to the center of the box and apply two blows with thehammer.11.1.5 Place the compacted material
25、and box in the freezerat 10 6 1C for a minimum of 12 h but no longer than 24 h.FIG. 1 Workability BoxFIG. 2 Flat Tamping FootFIG. 3 Penetration BladeD6704 08 (2015)211.1.6 Attach the penetration blade (see 7.6) to the adapterat the bottom of the proving ring of the Marshall apparatus withthe blade p
26、arallel to the front of the machine.11.1.7 Adjust the dial indicator to zero.11.1.8 Immediately transfer the box with the compactedmaterial from the freezer to the loading jack. Place it under theblade and on the support stand, ensuring that it is level andfirmly seated on the support stand.NOTE 3Th
27、e blade should be centered on the middle of the sample.11.1.9 Switch on the motor and bring the specimen close tothe blade and continue the upward movement of the jack headand start the timer when the dial indicator begins to move.Watch the dial carefully and record the highest readingobserved durin
28、g 30 s of penetration.NOTE 4The rate of penetration used in this test method is the same asTest Method D5581, 50.8 mm.11.1.10 Stop the motor, lower the jack head and remove thespecimen from the apparatus. The elapsed time for the testfrom removal of the test specimen from the freezer to thecompletio
29、n of the 30-s penetration shall not exceed 1 min.11.1.11 Repeat the preceding procedure on the other twospecimens.12. Report12.1 Report the average of the three readings.13. Workability13.1 The typical ranges of workability for asphalt coldmixes are shown in Table 1. The typical rates of workability
30、shown in Table 1 may be adjusted for variations in thetemperature ranges required for use.14. Precision and Bias14.1 The within-laboratory repeatability standard deviationhas been determined to be 10 % based on one lab, three testreplicates, and two different samples. The between-laboratoryreproduci
31、bility of this test method is being determined and willbe available on or before August 2013. Therefore, this testmethod should not be used for purchasing purposes.REFERENCES(1) Ministry of Transportation of Ontario “Ontario Laboratory StandardLS289.”(2) Tam, K. K. and Lynch, D. F., “New Methods for
32、 Testing Workabilityor 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:/ 1 Workability Temperature RangesWorkability, N Temperature Range, CA225 to 500 -22 to -1501 to 1000 -12 to 101001 to 2000 -1 to 212001 to 4000 10 to 324001 to 8000 21 to 43AExperience has shown that cold mixes with workability in the ranges shown aresuitable for use in the corresponding ambient temperature ranges.D6704 08 (2015)3
