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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Comparative tests as directed in 5. The determination of the wide-width strip force elongation properties of geotextiles provides design parameters for reinforcement type applications. NOTE 2—For geotextiles which shrink excessively when wet, cut the test specimens for obtaining wet tensile strength longer in dimension than that for dry tensile strength.
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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. On those fabrics, the contraction effect cited in 1.
Calculate secant tensile modulus using Eq 7 See Fig. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
ASTM D4595 Wide-Width Tensile Test Equipment for Geotextiles
When strength is not necessarily a design consideration, an alternative test method may be used for acceptance testing. This width, by contrast, is greater than the length of the specimen. 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 low force range may be used to establish the point of the applied pretension force on the force?
When this occurs, that increase of the specimen length must be added and included as part of Lg, nominal gage length. This is particularly the case for nonwoven geotextiles.
Approximately equal force increments should be used throughout the application of force having the? This is extended to intersect the zero elongation axis at point B8.
No other break shall be discarded unless the test is known to be faulty. For secant modulus, state that portion of the force? It is the intent of the task group to include the above mentioned clari? Measure the area bounded c4595 the curve, the perpendicular and the elongation axis by means of an integrator or a planimeter, or cut out the area of the chart under the force?
Asttm value for v is somewhat larger than usually found in practice. On those fabrics, the contraction effect cited in 1.
Number each specimen and then cut it crosswise into two parts, one for determining the conditioned tensile strength and the other for determining the wet tensile strength; each portion shall bear the specimen number. It is used with a constant rate of extension-type tension apparatus. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
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. The intersection point A9 is the zero elongation point from which elongation is measured. Some fabrics used in geotextile applications have a tendency to contract neck down under a force in the gage length area. In these cases, a break near the edge of the jaws is inevitable and shall be accepted as a characteristic of the particular method of test.
ASTM D Wide-Width Tensile Test Equipment for Geotextiles
To obtain thorough wetting, it may be necessary or advisable to add not more than 0. Test Specimen Preparation 8.
A number in parentheses indicates the year of last reapproval. 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.
The wide-width strip technique has been d4955 by the industry and is recommended in these cases for geotextile applications. When this is known, a preconditioning cycle, as described in Practice Dmay be awtm upon between contractural parties. Current edition approved Sept. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.