1、Designation:F170210An American National StandardStandard Test Method forMeasuring Impact-Attenuation Characteristics of NaturalPlaying Surface Systems Using a Lightweight PortableApparatus1This standard is issued under the fixed designation F1702;the number immediately following the designation indi
2、cates the year oforiginal adoption or,in the case of revision,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 is used to determine the impact-
3、attenuation characteristics of natural turfgrass and soil playingsurface systems with a lightweight portable apparatus.This testmethod can be used to compare the impact attenuation char-acteristics of natural playing surface systems,as well asassessing the effects of management practices on the impa
4、ctattenuation characteristics.This test method also can be used toassess the compactibility of natural playing surfaces by record-ing g-max values or penetration of successive impacts,or both.1.2 This test method provides a procedure for assessingimpact attenuation characteristics in the field,on bo
5、th actualplaying surfaces and research plots.Numerical data will not becomparable to data obtained using a different missile mass orgeometry,different drop height,or different standard method,for example,Test Method F1936.1.3 The values stated in SI units are to be regarded as thestandard.The values
6、 given in parentheses are for informationonly.1.4This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulator
7、y limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D5874 Test Method for Determination of the Impact Value(IV)of a SoilE105 Practice for Probability Sampling of MaterialsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic o
8、f aLot or ProcessE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodF355 Test Method for ImpactAttenuation of Playing SurfaceSystems and MaterialsF1936 Specification for Impact Atten
9、uation of Turf PlayingSystems as Measured in the FieldF2650 Terminology Relating to Impact Testing of SportsSurfaces and EquipmentF2651 Terminology Relating to Soil and Turfgrass Charac-teristics of Natural Playing Surfaces3.Terminology3.1 DefinitionsExcept as noted,definitions in this stan-dard are
10、 in accordance with Terminologies F2650 and F2651.4.Summary of Test Method4.1 A 2.25-kg missile is dropped from a specific height,through a guide tube,onto a playing surface.A linear acceler-ometer mounted on the missile monitors the acceleration andtime history of the impact.The maximum acceleratio
11、n duringthe impact(relative to gravity)is recorded and reported asg-max.Reporting the time history of the impact is optional.Depth of penetration from successive drops may also berecorded optionally as an indication of soil compactibility.NOTE1This test method is based on an impact tester developed
12、byClegg(1,2).3See Test Method D5874.Such impact testers are commer-cially available.Commercially available Clegg Impact Soil Testers displayresults in impact value units,where one impact value equals 10 g-maxunits(Test Method D5874),and typically do not display tenths of animpact value unit.For use
13、in this standard,the display should be alteredby the manufacturer or authorized personnel to indicate tenths of animpact value or 1 g-max unit.Also,other suitable recording equipmentcan be used to obtain resolution to 1 g-max.A 4.5-kg missile has beenused to evaluate road base surfaces(1,2).A 0.5-kg
14、 poly(vinyl chloride)1This test method is under the jurisdiction of ASTM Committee F08 on SportsEquipment,Playing Surfaces,and Facilities and is the direct responsibility ofSubcommittee F08.64 on Natural Playing Surfaces.Current edition approved July 1,2010.Published August 2010.Originallyapproved i
15、n 1996.Last previous edition approved in 2002 as F1702 96(2002)1.DOI:10.1520/F1702-10.2For 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
16、 onthe ASTM website.3Numbers in parentheses refer to the list of references at the end of this testmethod.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 missile has been utilized to relate field surfaces to ball bounce(3-6),player response(7),and performance including injury potential(8).5.Significance and Use5.1 The g-max values obtained by these procedures areindicative of the impact attenuation characteristics of playingsurfaces u
