1、Designation:D624406(Reapproved 2011)Standard Test Method forVertical Compression of Geocomposite Pavement PanelDrains1This standard is issued under the fixed designation D6244;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year
2、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 covers vertical strain and core areachange of geocomposite pavement drains,such as thoseincluded in Spe
3、cification D7001,under vertical compression.1.2 The values as stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of
4、 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:2D1566 Terminology Relating to RubberD4354 Practice for Sampling of Geosynthetics and RolledErosion Contro
5、l Products(RECPs)for TestingD4439 Terminology for GeosyntheticsD7001 Specification for Geocomposites for Pavement EdgeDrains and Other High-Flow Applications3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 compressive deformation,nthe decrease in gagelength produced in the test
6、specimen by a compressive load,expressed in units of length(new).3.1.2 compressive strain,nthe ratio of compressive defor-mation to the gage length of the test specimen,expressed as adimensionless ratio(new).3.1.3 gage length,nthe known distance between twobench marks(see Terminology D1566).3.1.3.1
7、DiscussionIncompressiontestingofgeosynthetics,gage length is the measured thickness of the testspecimen under specified compressional force,expressed inunits of length.3.1.4 geosynthetic,na planar product manufactured frompolymeric material used with foundation,soil,rock,earth,orany other geotechnic
8、al engineering-related materials as anintegral part of a manmade project,structure,or system(seeTerminology D4439).3.1.5 index test,na test procedure,which may contain aknown bias but which may be used to order a set of specimenswith respect to the property of interest(see TerminologyD4439).4.Summar
9、y of Test Method4.1 Geocomposite pavement edge drains are placed into a304.8-mm(12-in.)long,106.7-mm(4.20-in.)wide,and610-mm(24-in.)tall glass and aluminum compression cham-ber.The geocomposites are placed against the wall of thechamber.The remainder of the chamber is then backfilled witha specified
10、 sand.A vertical load is applied at a constant rate.The vertical strains of the panels and change in core area andheight is recorded at 1112.5-N(250-lb)increments.The test isdiscontinued at 4450 N(1 000 lb)or 156.5 kPa(22.7 psi).Thechange in vertical strain,core height,and core area is deter-mined.5
11、.Significance and Use5.1 The vertical compression test for geocomposite pave-ment panel drains is intended to simulate vertical,horizontal,and eccentric loading resulting from an applied vertical load.The results of the analyses,including vertical strain of thepanels and core area change,may be used
12、 as an index test.Thevertical compression test may be used to evaluate core areachange for a given load.5.2 The vertical compression test may be used to evaluatepercent vertical strain for a given load.5.3 This test method may be modified to evaluate core areachange and vertical strain under various
13、 backfill conditions.1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechani-cal Properties.Current edition approved Oct.1,2011.Published November 2011.Originallyapproved in 1998.Last previous edition approv
14、ed in 2006 as D6244-06.DOI:10.1520/D6244-06R11.2For 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 Inte
15、rnational,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.Apparatus6.1 Compression MachineA compression machine that iscapable of producing at least 4450 N(1 000 lb)of load.Themachine must be capable of loading at a rate of 445 N(100lbs)/min,and maintaining a const
16、ant load for an indefiniteperiod.6.2 Compression BoxThe box must be capable of holdingthe specimen and the backfill material,and it must be capableof supporting a minimum vertical load of 4450 N(1 000 lb).The design of the box and the loading plate shall conform tothe attached Fig.1.The box shall be rigid enough to resistdeformation.FIG.1 Edge Drain Compression ChamberD6244 06(2011)2 6.3 Clear Plastic Spacers(shown and described in Fig.2)These spacers are used to protect the tempered glass endso
