ASTM D4595-2017 Standard Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method《采用宽带法测定土工织物拉伸特性的标准试验方法》.pdf
《ASTM D4595-2017 Standard Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method《采用宽带法测定土工织物拉伸特性的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D4595-2017 Standard Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method《采用宽带法测定土工织物拉伸特性的标准试验方法》.pdf(16页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D4595 11D4595 17Standard Test Method forTensile Properties of Geotextiles by the Wide-Width StripMethod1This standard is issued under the fixed designation D4595; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r 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 the measurement of tensile properties of geotextiles using a wide-width strip specimen te
3、nsilemethod. This test method is applicable to most geotextiles that include woven fabrics, nonwoven fabrics, layered fabrics, knitfabrics, and felts that are used for geotextile application.1.2 This test method covers the measurement of tensile strength and elongation of geotextiles and includes di
4、rections for thecalculation of initial modulus, offset modulus, secant modulus, and breaking toughness.1.3 Procedures for measuring the tensile properties of both conditioned and wet geotextiles by the wide-width strip method areincluded.1.4 The basic distinction between this test method and other m
5、ethods for measuring strip tensile properties is the width of thespecimen. Some fabrics used in geotextile applications have a tendency to contract (neck down) under a force in the gage lengtharea. The greater width of the specimen specified in this test method minimizes the contraction effect of th
6、ose fabrics and providesa closer relationship to expected geotextile behavior in the field and a standard comparison.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriat
7、e safety and health practices and determine the applicability of regulatorylimitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International
8、Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D76 Specification for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD579 Specification for Greige Woven Glass
9、 FabricsD1776 Practice for Conditioning and Testing TextilesD2905 Practice for Statements on Number of Specimens for Textiles (Withdrawn 2008)3D4439 Terminology for Geosynthetics3. Terminology3.1 atmosphere for testing geotextiles, n.air maintained at a relative humidity of 65 6 5 % and a temperatur
10、e of 21 6 2C(70 6 4F).3.1 atmosphere for testing geotextiles, nair maintained at a relative humidity of 65 6 5 % and a temperature of 21 6 2 C(70 6 4 F).3.2 breaking toughness, T, (FL 1), Jm 2, n.for geotextiles, the actual work-to-break per unit surface area of material.1 This test method is under
11、the jurisdiction ofASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechanical Properties.Current edition approved Oct. 1, 2011June 1, 2017. Published March 2009June 2017. Originally approved in 1986. Last previous edition approved in 20092011 as D4595 0
12、9.11. DOI: 10.1520/D4595-11.10.1520/D4595-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last appro
13、ved version of this historical standard is referenced on www.astm.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depic
14、t all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1942
15、8-2959. United States13.2.1 DiscussionBreaking toughness is proportional to the area under the force elongation curve from the origin to thebreaking point (see also work-to-break). Breaking toughness is calculated from work-to-break, gage length, and width of aspecimen.3.2 breaking toughness, T, (FL
16、1), Jm2, nfor geotextiles, the actual work-to-break per unit surface area of material.3.2.1 DiscussionBreaking toughness is proportional to the area under the force-elongation curve from the origin to the breaking point (see alsowork-to-break). Breaking toughness is calculated from work-to-break, ga
17、ge length, and width of a specimen.3.3 corresponding force, F c, n.the force associated with a specific elongation on the force-per-unit-width strain curve. (Syn.load at specified elongation, LASE.)3.3 corresponding force, Fc, nthe force associated with a specific elongation on the force-per-unit-wi
18、dth strain curve. (Syn.load at specified elongation, LASE.)3.4 geotechnical engineering, n.the engineering application of geotechnics.3.4 geotechnical engineering, nthe engineering application of geotechnics.3.5 geotechnics, n.the application of scientific methods and engineering principles to the a
19、cquisition, interpretation, and useof knowledge of materials of the earths crust to the solution of engineering problems.3.5.1 DiscussionGeotechnics embraces the fields of soil mechanics, rock mechanics, and many of the engineering aspects ofgeology, geophysics, hydrology, and related sciences.3.5 g
20、eotechnics, nthe application of scientific methods and engineering principles to the acquisition, interpretation, and useof knowledge of materials of the earths crust to the solution of engineering problems.3.5.1 DiscussionGeotechnics embraces the fields of soil mechanics, rock mechanics, and many o
21、f the engineering aspects of geology, geophysics,hydrology, and related sciences.3.6 geotextile, n.any permeable textile material used with foundation, soil, rock, earth, or any other geotechnical engineeringrelated material, as an integral part of a man-made project, structure, or system.3.6 geotex
22、tile, nany permeable textile material used with foundation, soil, rock, earth, or any other geotechnical engineeringrelated material, as an integral part of a man-made project, structure, or system.3.7 initial tensile modulus, J i, (FL1), Nm1, n.for geotextiles, the ratio of the change in tensile fo
23、rce per unit width to achange in strain (slope) of the initial portion of a force per unit width strain curve.3.7 initial tensile modulus, Ji, (FL1), Nm1, nfor geotextiles, the ratio of the change in tensile force per unit width to a changein strain (slope) of the initial portion of a force-per-unit
24、-width strain curve.3.8 offset tensile modulus, J o, (FL1), Nm1, n.for geotextiles, the ratio of the change in force per unit width to a change instrain (slope) below the proportional limit point and above the tangent point on the force elongation curve.3.8 offset tensile modulus, Jo, (FL1), Nm1, nf
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