1、Designation: D 6704 01Standard Test Method forDetermining the Workability of Asphalt Cold Mix PatchingMaterial1This standard is issued under the fixed designation D 6704; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of
2、last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 materials.1.2
3、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 Precision and bias for this test method has not beendetermined, therefore, this test me
4、thod should not be used forpurchasing purposes.1.4 This procedure may involve hazardous materials, opera-tions, and equipment. This standard does not purport toaddress all of the safety concerns, if any, associated with itsuse. It is the responsibility of the user of this standard toestablish approp
5、riate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:C 702 Practice for Reducing Samples of Aggregate toTesting Size2D 8 Terminology Relating to Materials for Roads and Pave-ments3D 75 Practice for Samplin
6、g Aggregates3D 3665 Practice for Random Sampling of ConstructionMaterials3D 4753 Specification for Evaluating, Selecting, and Speci-fying Balances and Scales for Use in Testing Soil, Rock,and Related Construction Material4D 5581 Test Method for Resistance to Plastic Flow ofBituminous Mixtures Using
7、Marshall Apparatus (6-inchDiameter Specimen)3E 1 Specification for ASTM Thermometers53. Terminology3.1 Definition of Term 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 desi
8、gnated box.3.2 Definitions for other terms used in this test method maybe found in Terminology D 8 or a standard unabridged dictio-nary.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 differ
9、ent 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 char
10、acteristics 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 asp
11、halt 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 va
12、lues.6.2 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, capable of maintaining a temperature of -10 61C.1This test method is under the jurisdict
13、ion of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.27 onCold Mix Asphalts.Current edition approved Aug. 10, 2001. Published October 2001.2Annual Book of ASTM Standards, Vol 04.02.3Annual Book of ASTM Standards, Vol 04.03.4Annual Book of ASTM St
14、andards, Vol 04.08.5Annual Book of ASTM Standards, Vol 14.03.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 Balance, conforming to the requirements of Specifica-tion D 4753, Class GP5.7.3 Boxes, three square workability boxes or
15、 other similarmolds, constructed to measure 165 by 165 by 50-mm deepinside dimensions and sufficiently rigid for forming and mea-suring the asphalt cold mix specimens (Fig. 1).7.4 Compaction Hammer, specified in Test Method D 5581with a flat tamping foot (Fig. 2) of 150 by 150 by 6-mm thickattached
16、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 TestMethod D 5581 and modified as necessary to provide at least45 s of loading.NOTE 1Instead of the compression testing machine, any suitableload-measuring device may
17、be used provided capacity and sensitivitymeet the above requirements.7.6 Blade, a flat steel penetration blade (Fig. 3) measuring130 mm wide, 50 mm in height and 3 mm thick attached to theadapter at the bottom of the proving ring.7.7 ThermometerASTM low cloud and pour thermom-eters having a range fr
18、om -80 to +20C, and conforming to therequirements for thermometer 114C as prescribed in Specifi-cation E 1.7.8 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 Ob
19、tain field samples in accordance with PracticeD 3665.9.2 Alternate 1, Stockpile or Packaged Material:9.2.1 After stirring the stockpile, obtain 3 samples in accor-dance with Practice D 75 or obtain 3 samples from thecontainer.NOTE 2Asphalt cold mixes that are in stockpile for some time maydevelop a
20、crust on the 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 C 702 to obtain a 2500 6 100-g laboratory samplefrom each of the 3 field samples.9.3 Alternate 2, Pl
21、ant Mixed Material:9.3.1 Obtain 3 samples in accordance with Practice D 3665,of cold mix from the material proposed for use.9.3.2 Use standard quartering procedures as detailed inPractice C 702 to obtain a 2500 6 100-g laboratory samplefrom each of the 3 field samples.10. Standardization10.1 Verify
22、calibration of the 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 unif
23、ormly over the box 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 com
24、pacted material and box in the freezerat -10 6 1C for a minimum of 12 h but no longer than 24 h.11.1.6 Attach the penetration blade (see 7.6) to the adapterat the bottom of the proving ring of the Marshall apparatus withthe blade parallel to the front of the machine.11.1.7 Adjust the dial indicator
25、to zero.11.1.8 Immediately transfer the box with the compactedmaterial from the freezer to the loading jack. Place it under theFIG. 1 Workability BoxFIG. 2 Flat Tamping FootFIG. 3 Penetration BladeD6704012blade and on the support stand, ensuring that it is level andfirmly seated on the support stand
26、.NOTE 3The 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 readingobser
27、ved during 30 s of penetration.NOTE 4The rate of penetration used in this test method is the same asTest Method D 5581, 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 th
28、ecompletion 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 w
29、orkabilityshown in Table 1 may be adjusted for variations in thetemperature ranges required for use.14. Precision and Bias14.1 Precision and bias for this test method are currentlybeing determined and will be available on or before June 2006.REFERENCES(1) Ministry of Transportation of Ontario “Ontar
30、io Laboratory StandardLS289.”(2) Tam, K. K. and Lynch, D. F., “New Methods for Testing Workabilityor through the ASTM website(www.astm.org).TABLE 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 shownare suitable for use in the corresponding ambient temperature ranges.D6704013
