ASTM E2157-2001(2005) Standard Test Method for Measuring Pavement Macrotexture Properties Using the Circular Track Meter《用环道计测量路面宏观结构性能的标准试验方法》.pdf
《ASTM E2157-2001(2005) Standard Test Method for Measuring Pavement Macrotexture Properties Using the Circular Track Meter《用环道计测量路面宏观结构性能的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM E2157-2001(2005) Standard Test Method for Measuring Pavement Macrotexture Properties Using the Circular Track Meter《用环道计测量路面宏观结构性能的标准试验方法》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E 2157 01 (Reapproved 2005)Standard Test Method forMeasuring Pavement Macrotexture Properties Using theCircular Track Meter1This standard is issued under the fixed designation E 2157; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、 of revision, the year of 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 covers the procedure for obtaining andanalyzing pavement macrotexture prof
3、iles using the CircularTrack Meter (CTMeter).1.2 The CTMeter consists of a charge coupled device(CCD) laser displacement sensor which is mounted on an armthat rotates such that the displacement sensor follows a circulartrack having a diameter of 284 mm (11.2 in.).1.3 The CTMeter is designed to measu
4、re the same circulartrack that is measured by the Dynamic Friction Tester(DFTester).1.4 The CTMeter can be used both for laboratory investi-gations and in the field on actual paved surfaces.1.5 The software developed for the CTMeter reports theMean Profile Depth (MPD) and the Root Mean Square (RMS)v
5、alues of the macrotexture profiles.1.6 The values stated in SI (metric) units are to be regardedas standard. The inch-pound equivalents are rationalized, ratherthan exact mathematical conversions.1.7 This standard does not purport to address all of thesafety concerns, if any, associated with its use
6、. It is theresponsibility 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:2E 867 Terminology Relating to Vehicle-Pavement SystemsE 1845 Practice for Ca
7、lculating Pavement MacrotextureMean Profile DepthE 1911 Test Method for Measuring Paved Surface Fric-tional Properties Using the Dynamic Friction Tester2.2 Other Document:Manufacturers “Operating Manual for the Circular TextureMeter,” Sunny Koken Company, 3-8-4 Shinsayama,Sayama-shi, Saitama-ken, Ja
8、pan 13313. Terminology3.1 See Terminology E 867.3.2 Definitions:3.2.1 negative textureMacrotexture produced by depres-sions in the surface.3.2.2 positive textureMacrotexture produced by asperitiesprojecting above the surface.4. Summary of Test Method4.1 This method utilizes a displacement sensor tha
9、t ismounted on an arm that rotates clockwise at a fixed elevationfrom the surface being measured. The sensor is attached to thearm at a radius of 142 mm (5.6 in.).4.2 The device is controlled by a notebook computer whichsaves and processes the data. When the measurement isinitiated by the computer,
10、a DC motor drives the arm for a full360 revolution.4.3 The profile is recorded in the computer memory and isdivided into eight segments for analysis (See Fig. 1). Thecomputer software can process the data to report either theMPD in accordance with Practice E 1845 or the RMS or bothfor each segment.5
11、. Significance and Use5.1 In the PIARC International Experiment ( 13)itwasfound that the volumetric mean texture depth (MTD) washighly correlated to the speed constant of the InternationalFriction Index. It has been found that the average of the MPDvalues for the eight segments using the CTMeter is
12、extremelyhighly correlated with the MTD and can replace the volumetricmeasurement for determination of the MTD (2). The recom-mended relationship for the estimate of the MTD from theMPD by the CTMeter is:MTD 5 0.947 MPD 1 0.069 (1)when MTD and MPD are expressed in millimetres,or:1This test method is
13、 under the jurisdiction of ASTM Committee E17 onVehicle-Pavement Systems and is the direct responsibility of Subcommittee E17.23on Surface Characteristics Related to Tire Pavement Slip Resistance.Current edition approved Oct. 1, 2005. Published December 2005. Originallyapproved in 2001. Last previou
14、s edition approved in 2001 as E 2157 01.2For 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.3The boldface numbers
15、 given in parentheses refer to a list of references at theend of the text.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.MTD 5 0.947 MPD 1 0.0027 (2)when MTD and MPD are expressed in inches.NOTE 1These equations differ from those gi
16、ven in Practice E 1845,which are for the estimated texture depths from linear profiles.5.2 Comparison of the MPD and the RMS for a surfaceprovides information of the nature of the texture, that is,whether the texture is positive or negative ( 3).5.3 Analysis of the individual segments can be perform
17、ed toexamine the profile parallel to the direction of travel (segmentsA and E) and perpendicular to the direction of travel (segmentsC and G). This information could be particularly useful in thestudy of surfaces that have texture with significant directionalcharacteristics.6. Apparatus6.1 CTMeterTh
18、e measuring instrument consists of a CCDlaser-displacement sensor mounted on an arm that rotates at 80mm (3.15 in.) above the surface on a diameter of 284 mm(11.18 in.). The arm is driven by a DC motor at a tangentialvelocity of 6 m/min (19.7 ft/min) in a counterclockwisedirection.6.2 Data Collectio
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