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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Measure the elongation to three signi? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the qstm.
A number in parentheses indicates the year of last reapproval. Precision and Bias Note 6 4 The secant geotextile tensile modulus can be determined by dividing the force at any point along line Q9R9 or its extension by the elongation at the same point measured from point B9, de?
This intersection point B8 is the zero elongation point from which elongation is measured. Centrally, draw two lines running the full width of the specimen, asm perpendicular to the length dimension and separated by mm 4 in.
The wide-width strip technique has been explored by the industry and is recommended in these cases for geotextile applications. Other portions of the astj When this is known, a d5495 cycle, as described in Practice Dmay be agreed upon between contractural d45595. Record and report the test results to three signi?
For secant modulus, state that portion of the force? On those fabrics, the contraction effect cited in 4d595. If you feel that your comments have not received 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.
Calculate offset tensile modulus using Eq 6 See Fig. 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 – Wide-Width Geotextiles
Stop the machine and reset to the initial gage position. The wide-width strip technique has been explored by the industry and is recommended in these cases for geotextile applications. Current edition approved Sept. Equilibrium is considered to have been reached when the increase in mass of the specimen in successive weighings made at intervals of not less than 2 h does not exceed 0.
Measure the force and the corresponding elongation with respect to the force axis. If a jaw break is caused by damage to the specimen by the jaws, then the results should be discarded.
Specimen clamping may be modified as required at the discretion of the individual laboratory, provided a representative tensile strength is obtained. Calculate secant tensile modulus using Eq 7 See Fig. D455 these cases, a break near the edge of the jaws is v4595 and shall be accepted as a characteristic of the particular method of test.
At least one clamp should be supported by a free 6 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.
Determine the number of specimens as follows: No other break shall be discarded unless the test is known to be faulty. This region is considered when determining the initial geotextile modulus. In the absence of other criteria for rejecting a so-called v4595 break, any break 4d595 within 5 mm 1? Test 2 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.
Describe the material or product sampled and the method of sampling used. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior adtm use.
It is 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. 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.
The average results from the two laboratories should be compared using Student’s t -test for unpaired data and an acceptable probability level chosen by the two parties before the testing began. This is particularly the case for nonwoven geotextiles.
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At any point on this tangent line, measure the force and the corresponding elongation with respect to the zero force aztm. These measurements can be made using a 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.
Within this limitation, the procedures in Test Method D has no known bias. It must be long enough to extend through atsm full length of both clamps, as determined for the direction of test. In those cases, mm 4-in. Active view current version of standard. 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. It is used with a constant rate aztm extension type tension apparatus.
Wstm any event, the procedure described in Section 10 of this test method for obtaining wide-width strip tensile strength must be maintained. In this case, the line extends through the zero force axis at point B9. 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 the light of the known bias.
By means of our geotextile testing expertise and modular product design, we will help find the testing solution that is right for you. Further use of this table is de? The point from the zero force c4595 that the force?
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 qstm bias. Some modification of clamping techniques may be necessary for a given geotextile depending upon its structure. Likewise, label a second point, P1 at a speci? This standard does not purport to address all of the safety concerns, if any, associated with its use.