ASTM D4595 PDF
This standard is issued under the fixed designation D ; the number immediately 1 This test method is under the jurisdiction of ASTM Committee D35 on. Designation: D – 09Standard Test Method for TE D Tensile Properties of Geotextiles by the Wide-Width Strip. ASTM D measures the tensile properties of geotextiles using a wide-width strip specimen tensile method. ASTM D is applicable to most geotextiles.
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This region is considered when determining the initial geotextile modulus. These designs have been used in the laboratory and have provided reproducible tensile strengths. G90 Mechanical Vice Grip.
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Centrally, draw two lines running the full width of the ast, accurately perpendicular to the length dimension and separated by mm 4 in. Likewise, label a second point, P1 at a speci? This width, by contrast, is greater than the length of the specimen. On those fabrics, the contraction effect cited in 1. Test Method D for the determination of the wide-width strip tensile properties of geotextiles may be used for the acceptance testing of commercial shipments of geotextiles, but caution is advised since information about between-laboratory precision is incomplete Note 6.
Within this limitation, the procedures in Test Method D has no known bias. In any event, the strain rate described in If you feel that your comments have not d4559 a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
This test method is applicable to most geotextiles that include woven fabrics, nonwoven fabrics, layered fabrics, knit fabrics, and felts that are used for geotextile application. In some cases, it may also be caused by a concentration of stress in the area adjacent to the jaws because they prevent the specimen from contracting in width as the force is applied.
It is used with a constant rate of extension type tension apparatus. Comparative tests as directed in 5.
ASTM D Wide-Width Tensile Test Equipment for Geotextiles
Summary of Method 4. The greater width of the specimen specified in this test method minimizes the contraction effect of those fabrics and provides a closer relationship to expected geotextile behavior in the field and a standard comparison.
ASTM D is applicable to most geotextiles that include woven fabrics, nonwoven fabrics, layered fabrics, knit fabrics, and felts that are used for geotextile application. Tensile strength, elongation, initial and secant modulus, and breaking toughness of the test specimen can be calculated from machine scales, dials, xstm charts, or d459 interfaced computer. Breaking toughness is calculated from work-to-break, gage length, and width of a specimen.
ASTM D4595 Wide-Width Tensile Test Equipment for Geotextiles
NOTE 2—For geotextiles which shrink excessively when wet, cut the test specimens for obtaining aatm tensile strength longer in dimension than that for dry tensile strength. On those fabrics, the contraction effect cited in axtm. Some modification of clamping techniques may be necessary for a given geotextile depending upon its structure.
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NOTE 1—The extent of the sampling for wide-width strip tensile properties is generally de? This intersection, point B, is the zero elongation point from which elongation is measured. This test method is applicable to most geotextiles that include woven fabrics, nonwoven fabrics, layered fabrics, knit fabrics, and felts that are used for geotextile application.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Draw a straight line secant through both points P1 and P2 intersecting the zero force axis. The time of immersion must be sufficient to wet-out the specimens thoroughly, as indicated by no signi?
ASTM D measures the tensile properties of geotextiles using a wide-width strip specimen tensile method. A superscript epsilon e indicates an editorial change since the last revision or reapproval. The test specimens asym then be randomly assigned in equal numbers to each laboratory for testing. In those cases, mm 4-in.
It r4595 the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Competent statistical assistance is recommended for the investigation of bias. NOTE 5—Some clamping arrangements may lead to slack in the specimen within the gage area. In cases of dispute, take a sample that will exclude fabric from the outer wrap of the roll or the inner wrap around the core.
At a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question. A number in parentheses indicates the year of last reapproval. As a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question.
ASTM D – Wide-Width Geotextiles
Forces up to 50 kN 11, lbf Thickness of 0 – 30 mm 0 – 1. No other break shall be discarded unless the test is known to be faulty. These measurements can be made using astn sealed rule taped on a line on the upper end of the specimen, in the gage area, and recording the change in length as measured from a line spaced 3 in. A low force range may be used to establish the point of the applied pretension force on the force?
This test method is applicable to most geotextiles that include woven fabrics, nonwoven fabrics, layered fabrics, knit fabrics, and felts that are used for geotextile application. Precision and Bias Note 6 4 This is particularly the case for nonwoven geotextiles.
NOTE 4—It is recognized that some tensile tests on geotextiles are conducted using a manually applied strain rate. The intersection point A9 is the zero elongation point from which elongation is measured. Some x4595 used in geotextile applications have a tendency to contract neck down under a force in the gage length area.
Record and report the test results to three signi? In any event, the procedure described in Section 10 of this test d45955 for obtaining wide-width strip tensile strength must be maintained. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in light of the known bias.