1、Designation: D 6566 00 (Reapproved 2006)Standard Test Method forMeasuring Mass per Unit Area of Turf Reinforcement Mats1This standard is issued under the fixed designation D 6566; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 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 an index to the determination ofmass per unit area of all turf reinforcement mats.1.
3、2 The values 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 the user of this standard to establish appro
4、-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 123 Terminology Relating to TextilesD 1776 Practice for Conditioning and Testing TextilesD 4354 Practice for Sampling of Geosynthetics for TestingD
5、 4439 Terminology for Geosynthetics2.2 ISO/DIS Document:9864-1990 Mass per Unit Area of Geotextiles33. Terminology3.1 Definitions:3.1.1 geosynthetic, na planar product manufactured frompolymeric material used with soil, rock, earth, or othergeotechnical-engineering-related material as an integral pa
6、rt ofa man-made project, structure, or system.3.1.2 geotextile, nany permeable textile used with foun-dation, soil, rock, earth, or any other geotechnical-engineering-related material as an integral part of a man-made project,structure, or system.3.2 For definitions of other textile terms used in th
7、is testmethod, refer to Terminology D 123.3.3 For definitions of other terms relating to geotextiles usedin this test method, refer to Terminology D 4439.4. Summary of Test Method4.1 The mass per unit area of a turf reinforcement mat isdetermined by weighing test specimens of known dimensions,cut fr
8、om equally spaced distances over the full width of thelaboratory sample. The calculated values are then averaged toobtain the mean mass per unit area of the laboratory sample.5. Significance and Use5.1 This test method is used to determine if the turfreinforcement mat meets specifications for mass p
9、er unit area.This test method can be used for quality control to determinespecimen conformance. This measurement allows for a simplecontrol of the delivered material by a comparison of the massper unit area of the delivered material and the specified massper unit area.5.2 The procedure in this test
10、method may be used foracceptance testing of commercial shipments, but caution isadvised since information about between-laboratory precisionis incomplete. Comparative tests in accordance with 5.2.1 areadvisable.5.2.1 In case of a dispute arising from differences inreported test results when using th
11、e procedures in this testmethod for acceptance testing of commercial shipments, thepurchaser and the manufacturer should conduct comparativetests to determine if there is a statistical bias between theirlaboratories. Competent statistical assistance is recommendedfor the investigation of bias. As a
12、minimum, the two partiesshould take a group of test specimens that are as homogeneousas possible and which are from a lot of material of the type inquestion. The test specimen should then be randomly assignedin equal numbers to each laboratory for testing. The averageresults from the two laboratorie
13、s should be compared using theappropriate students t-test and an acceptable probability levelchosen by the two parties before testing is begun. If a bias isfound, either its cause must be found and corrected or thepurchaser and the manufacturer must agree to interpret futuretest results in light of
14、the known 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 Control.Current edition approved June 1, 2006. Published June 2006. Originallyapproved in 2000. Last previous edition appr
15、oved in 2000 as D 6566 00.2For 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.3Available from American National S
16、tandards Institute, 11 W. 42nd St., 13thFloor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Apparatus6.1 Balance, calibrated, with an accuracy of 0.01 g.7. Sampling7.1 Lot SampleDivide the test specimens into
17、 lots, and forthe lot to be tested, take the lot sample in accordance withPractice D 4354.7.2 Laboratory SampleConsider the units in the lotsample as the units in the laboratory sample. For the laboratorysample, take a full width swatch of sufficient length along theselvage so that the requirements
18、of 7.3 can be met.7.2.1 The laboratory sample should be free from imperfec-tions or other areas not representative of the material sampled.7.3 The number of test specimens shall be a minimum offive, cut such that they are representative of the entire rollwidth and with a combined total minimum area
19、of230 000 mm2(356 in.2). Each test specimen shall be equal inarea (not less than 23 000 mm2(35.6 in.2). Cut each testspecimen with an accuracy of 60.5 % of its area.NOTE 1For test specimens prepared in the field, larger thanminimum-sized test specimens will be required to stay within the cuttingaccu
20、racy (0.5 %). Field experience has shown that a test specimen with anarea not less than 207 000 mm2(320.4 in.2) will be necessary to achievethe required accuracy.7.3.1 Cut the test specimens at least one tenth the width ofthe turf reinforcement mat from any selvage, unless otherwisespecified.7.3.2 I
21、f the structure of the turf reinforcement mat is suchthat the specified test specimen size is not representative of thelaboratory sample, a larger size shall be agreed upon betweenthe purchaser and the supplier.8. Conditioning8.1 Bring the specimens to moisture equilibrium in theatmosphere for testi
22、ng turf reinforcement mats, that is atemperature of 21 6 2C (70 6 4F) and relative humidity of60 6 10 %.8.2 Moisture equilibrium is considered to have been reachedwhen the increase in mass of the specimen in successiveweighings made at intervals of not less than 2 h, does notexceed 60.1 % of the mas
23、s of the specimen. In general, manyturf reinforcement mats contain more moisture when receivedthan they will after reaching moisture equilibrium. However,certain fibers may exhibit slow moisture equilibrium rates fromthe “as received” wet side. When this is known, a precondi-tioning cycle, a describ
24、ed in Practice D 1776, may be agreedupon between contractual parties.9. Procedure9.1 Test the conditioned test specimens in the standardatmosphere for testing turf reinforcement mats as prescribed in8.1.9.2 Care should be taken in handling of the test specimensto avoid altering the natural finished
25、state of the material.9.3 Weigh each of the conditioned specimens separately ona calibrated balance to the nearest 0.01 g.10. Calculation10.1 Calculate the mass per unit area of each of thespecimens as follows:m 5 Ms 3 1 000 000/A (1)where:m = mass per unit area rounded to the nearest 0.1 g/m2,Ms =
26、mass of the specimen, g, andA = area of the specimen, mm210.2 Repeat this procedure for each test specimen.10.3 Calculate the average and standard deviation of themass per unit area results for the test specimens.11. Report11.1 Report the following information on mass per unit areaof turf reinforcem
27、ent mats:11.1.1 Type of turf reinforcement mat tested, samplingmethod used, the test specimen size, shape, and the number oftest specimens tested,11.1.2 The average mass per unit area and standard devia-tion to three significant figures, and11.1.3 A statement of any departures from the suggestedtest
28、ing procedures so that the results can be evaluated and used.12. Precision and Bias12.1 PrecisionThe precision of this test method is beingestablished.12.2 BiasThis test method has no bias because the valueof mass per unit area can only be defined in terms of a testmethod.13. Keywords13.1 mass per u
29、nit area; turf reinforcement mat; weightASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the
30、 riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of
31、 this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldm
32、ake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 6566 00 (2006)2
