ASTM D6525 D6525M-2014 7408 Standard Test Method for Measuring Nominal Thickness of Rolled Erosion Control Products《测量成卷冲刷防护产品公称厚度的标准试验方法》.pdf
《ASTM D6525 D6525M-2014 7408 Standard Test Method for Measuring Nominal Thickness of Rolled Erosion Control Products《测量成卷冲刷防护产品公称厚度的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D6525 D6525M-2014 7408 Standard Test Method for Measuring Nominal Thickness of Rolled Erosion Control Products《测量成卷冲刷防护产品公称厚度的标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D6525/D6525M 14Standard Test Method forMeasuring Nominal Thickness of Rolled Erosion ControlProducts1This standard is issued under the fixed designation D6525/D6525M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the
2、 year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the measurement of the nominalthickness of permanent rolled erosion control products.
3、1.2 This test method does not provide thickness values forpermanent rolled erosion control products under variablecompressive stresses. This test method determines nominalthickness, not necessarily minimum thickness.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separ
4、ately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 This standard does not purport to address all of thesafety concerns
5、, 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 regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D4354 Practice for Sampling of Geosynthetic
6、s and RolledErosion Control Products(RECPs) for TestingD5199 Test Method for Measuring the Nominal Thicknessof GeosyntheticsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3. Term
7、inology3.1 Definitions:3.1.1 pressure, nthe force or load per unit area.3.1.2 thickness(1) the distance between one planar surfaceand its opposite parallel and planar surface; (2) in permanentrolled erosion control products, the distance between the upperand lower surfaces of the material, measured
8、under a specifiedpressure and time.4. Summary of Test Method4.1 The nominal thickness of permanent rolled erosioncontrol products is determined by observing the perpendiculardistance that a movable plane is displaced from a parallelsurface by the permanent rolled erosion control product whileunder a
9、 specified pressure of 0.2 kPa 0.029 psi for 5 s.5. Significance and Use5.1 Thickness is one of the basic physical properties used tocontrol the quality of permanent rolled erosion control prod-ucts. Thickness values may aid in the calculation of otherpermanent rolled erosion control product paramet
10、ers. Thick-ness however is not generally an indication of field perfor-mance and generally should not be used in specifications. Thistest method is developed to aid manufacturers, designers, andend users in comparing the thickness of permanent rollederosion control products through the use of an acc
11、epted ASTMstandard.5.2 The thickness of permanent rolled erosion control prod-ucts may vary considerably depending on the pressure appliedto the specimen during measurement. Where observed changesoccur, thickness decreases when applied pressure is increased.To minimize variation, specific sample siz
12、e and applied pres-sure are indicated in this test method to ensure all results arecomparable.5.3 This test method may be used for acceptance testing ofcommercial shipments of permanent rolled erosion controlproducts, but caution is advised since information on between-laboratory precision is incomp
13、lete. Comparative tests in accor-dance with 5.3.1 may be advised.5.3.1 In case of a dispute arising from differences inreported test results when using this test method for acceptancetesting of commercial shipments, the purchaser and the sup-plier should conduct comparative tests to determine if the
14、re isa statistical bias between their laboratories. Competent statis-tical assistance is recommended for the investigation of bias.1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-thetic Erosion Contro
15、l.Current edition approved Aug. 1, 2014. Published September 2014. Originallyapproved in 2000. Last previous edition approved in 2012 as D6525 12. DOI:10.1520/D6525_D6525M-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For
16、 Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1As a minimum, the two parties should take a group of testspecimens that
17、are as homogeneous as possible and that areformed from a lot of material of the type in question. The testspecimens should be randomly assigned in equal numbers toeach laboratory for testing. The average results from the twolaboratories should be compared using Students t-test forunpaired data and a
18、n acceptable probability level chosen by thetwo parties before the testing is begun. If bias is found, eitherits cause must be found and corrected or the purchaser andsupplier must agree to interpret future tests in light of theknown bias.NOTE 1The user should be aware that the compressibility of th
19、ematerials, their rebound characteristics, and the like will also affect thethickness of the permanent rolled erosion control products following thetime they are rolled up on rolls, shipped, and stored.6. Apparatus6.1 Thickness Testing InstrumentThe thickness gaugeshall have a base (or anvil) and a
20、free-moving presser foot platewhose planar faces are parallel to each other to 0.1 mm. Agauge with a 150-mm 6-in. diameter presser foot, the baseshall extend at least 10 mm in all directions further than theedge of the approximately 17 500-mm2circular presser foot,shall be used for measurements of p
21、ermanent rolled erosioncontrol products. The instruments must be capable of measur-ing a maximum thickness of at least 25 mm 1 in. to anaccuracy of 60.2 mm. The gauges shall be constructed topermit gradual application of pressure to a specific force of 0.26 0.02 kPa 0.029 6 0.003 psi for permanent r
22、olled erosioncontrol products. Dead weight loading may be used.6.2 Cutting DiesDies to cut specimens should have di-mensions at least as large as a circle 200 mm 8 in. indiameter.NOTE 2Due to compressibility of many permanent rolled erosioncontrol products, the cutting and handling preparation may c
23、hange thethickness. Care should be exercised to minimize these effects.7. Sampling7.1 Lot SampleIn the absence of other guidelines, dividethe product into lots and take lot samples in accordance withPractice D4354.7.2 Laboratory SampleConsider the units in the lotsample as the units in the laborator
24、y sample. For the laboratorysample, take a full-width sample of sufficient length along thecenter section of the rolls. Exclude the inner and outer layers orwraps of the roll or any material containing folds, crushedareas, or other distortions not representative of the sampled lot.7.3 Remove test sp
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