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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In addition, the center portion of the specimen can be gaged using LVDTs or mechanical gages. G90 Mechanical Vice Grip. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Calculate offset tensile modulus using Eq 6 See Fig. The following procedural interpretations with respect to this method are suggested: In any event, the procedure described in Section 10 of this test method for obtaining wide-width strip tensile strength must be maintained. Give one of 4d595 application engineers a call today for help with creating the best budget and testing plan according to ASTM D Forces up to 50 kN 11, lbf Thickness of 0 – 30 mm 0 – 1.
Describe the material or product sampled and the method of sampling used. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
ASTM D – Wide-Width Geotextiles
For secant modulus, state that portion of the force? This is extended to intersect the zero elongation axis at point B8. The point from the zero force axis that the force? The intersection point A9 is the zero elongation point from which elongation is measured. ASTM D measures the tensile properties of geotextiles using a wide-width strip specimen tensile method.
Specimen satm may be modi? Other portions of the force? This intersection is the zero elongation point from which elongation is measured. Stop the machine and reset to the initial gage position. 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. Some fabrics used in geotextile applications have a tendency to contract neck down under r4595 force in the gage length area.
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. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If, however, it is merely due to randomly distributed weak places, it is a perfectly legitimate result. Continue until the required number of acceptable breaks have been obtained.
This width, by contrast, is greater than the length of the specimen. In those cases, mm 4-in.
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. The time of immersion must be sufficient to wet-out the specimens thoroughly, as indicated by no signi? Likewise, label a second point, P1 at a speci? This is particularly the case for nonwoven geotextiles.
The wide-width strip technique has been explored by the industry and is recommended in these asfm for geotextile applications. By comparing, it can be determined if slippage is occuring in the clamps. 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.
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The determination of the wide-width strip force elongation properties of geotextiles provides design parameters for reinforcement type applications. Centrally, draw two lines running the full width of the specimen, adtm perpendicular to the length dimension and separated by mm 4 in.
In those cases, mm 4-in. Breaking toughness is calculated from work-to-break, gage length, and width of a specimen. Precision and Bias Note 6 4 Special clamping adaptions may be necessary with strong geotextiles or geotextiles made from glass fibers to astk them from slipping in the clamps or being atsm as a result of being gripped in the clamps. Test Specimen Preparation 8. Current edition approved Sept. Specimen clamping may be modified as required at the discretion of the individual laboratory, provided a representative tensile strength is obtained.
Comparative tests as directed in 5. To obtain thorough wetting, it may be necessary or advisable to add not more than 0. On those fabrics, the contraction effect cited in 1.
Some fabrics used in geotextile applications have a tendency to contract neck down under a force in the gage length area. On those fabrics, the contraction effect cited d44595 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. This standard is subject to revision at any time by the responsible technical asttm and must be reviewed every?