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.
|Published (Last):||3 January 2007|
|PDF File Size:||13.45 Mb|
|ePub File Size:||5.96 Mb|
|Price:||Free* [*Free Regsitration Required]|
When strength is not necessarily a design consideration, an alternative test method may be used for acceptance testing. The major problem encountered was de? Do this by having the two lines, which were previously drawn 6 3 mm astmm. This region is considered when determining the initial geotextile modulus. This helps maintain specimen integrity during the test. In any event, the procedure described in Section 10 of this test method for obtaining wide-width strip tensile strength must be maintained.
Comparative tests as directed in 5. Competent statistical assistance is recommended for the investigation of bias.
The time of immersion must be sufficient to wet-out the specimens thoroughly, as indicated by no signi? It is used with a constant rate of extension type tension apparatus. 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 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. This value for v is somewhat larger than aatm found in practice. This width, by contrast, is greater than the length of the specimen. At least one clamp should be supported by a free 6 Forces up to 50 kN 11, lbf Thickness of 0 – 30 mm 0 – 1.
Stop the machine and reset to the initial gage position. We offer machines, apparatus, testers, tensile grips, test f4595, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, ashm, baths and custom solutions for unique applications.
The determination of the wide-width strip force elongation properties of geotextiles provides design parameters for reinforcement type applications. 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.
This is extended to intersect the zero elongation axis at point B8. 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.
Active Risk Management
Precision and Bias Note 6 4 Determine the number of specimens as follows: The wide-width strip technique has been explored by the industry and is recommended in these cases for geotextile applications. S4595 those fabrics, the contraction effect cited in 1.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. Individual reprints single or dd4595 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
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. ASTM D measures the tensile properties of geotextiles using a wide-width strip specimen astn method. Force range of 5 kN to kN 1, lbf tolbf Adjustable test space The most popular choice for static tension and compression tests These dual column testers are available in both tabletop and floor standing models.
Breaking toughness is calculated from work-to-break, gage length, and width of a specimen.
ASTM D Wide-Width Tensile Test Equipment for Geotextiles
Some fabrics used in geotextile applications have a tendency to contract neck down under a force in the gage length area. These designs have been used in the laboratory and have provided reproducible tensile strengths. The specimen length in asm machine direction and cross-machine direction tests, respectively, must be parallel to the direction of application of force. In any event, the procedure described in Section 10 of this test method for obtaining wide-width strip tensile strength must be maintained.
Describe the material or product sampled and the method of sampling used. Other portions of the force?
This width, by contrast, is greater than the length of the specimen. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The following procedural interpretations with respect to this method are suggested: Active view current version d455 standard.
To obtain thorough wetting, it may be necessary or advisable to add not more than 0. If a jaw break is caused by damage to the specimen by the jaws, then the results should be discarded.
The point where line CD? This intersection, point B, is the zero elongation point from which elongation is measured. This intersection is the zero elongation point from which elongation is measured. When this is known, asgm preconditioning cycle, as described in Practice Dmay be agreed upon between contractural parties.
Some fabrics used in geotextile applications have a tendency to contract neck down under a force in the gage length area.
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.