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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When strength is not necessarily a design consideration, an alternative test method may be used for acceptance testing. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The point from the zero force axis that the force? Draw a straight line secant through both points P1 and P2 intersecting the zero force axis.
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, d5495
This helps maintain specimen integrity during the test. 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. These clamps may be modi?
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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 astk. The sample may be taken from the end portion of a roll provided there is no evidence it is distorted or different from other portions of the roll.
Breaking toughness is calculated from work-to-break, gage length, and width of a specimen. G90 Mechanical Vice Grip. Within this limitation, the procedures in Test Method D has no known bias. To obtain thorough wetting, it may be necessary or advisable to add not more than 0. The following procedural interpretations with respect to this method are axtm Competent statistical assistance is recommended for the investigation of bias. If a jaw break is caused by asym to the specimen by the jaws, then the results should be discarded.
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 atsm parties before the testing began.
On those fabrics, the contraction effect cited in 1. The wide-width strip technique has been explored by the industry and is recommended in these cases for geotextile applications. On those fabrics, the contraction effect cited in 1. Centrally, draw two lines running the full width of the specimen, accurately perpendicular to the length dimension and separated by mm 4 in.
This intersection point B8 is the zero elongation point from which elongation is measured. Likewise, label a second point, P1 at a speci? These designs have been used in the laboratory and have provided reproducible tensile strengths.
In addition, the center portion of the specimen can be gaged using LVDTs or mechanical gages. Stop the machine and reset to the initial gage position. Test Specimen Preparation 8. Measure the elongation to three signi? By means of our geotextile testing expertise and modular product design, we will help find the testing solution that is right for you. 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.
This width, by contrast, is greater than the length of the specimen. Special clamping adaptions may be necessary with strong geotextiles or geotextiles made from glass? 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.
ASTM D Wide Width Tensile_百度文库
Some fabrics used in geotextile applications have a tendency to contract neck down under a force in the gage length 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 least one clamp should be supported by a free 6 Calculate offset tensile modulus using Eq 6 See Fig. It is the intent of the task group to include the above mentioned clari? This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? ASTM D is applicable to most geotextiles that include woven fabrics, nonwoven fabrics, layered fabrics, d455 fabrics, and felts that are used for geotextile application.
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.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of awtm of such rights, are entirely their own responsibility. The major problem encountered was de? This is particularly the case for nonwoven geotextiles.
Link to Active This link will always route to the current Active version of the standard.
Comparative tests as directed in 5. Give one of our application engineers a call today for help with creating the best budget and testing plan according to ASTM D When this occurs, that increase of the specimen length must be added and included as sstm of Lg, nominal gage length.
A time of at least 24 h has been found acceptable in most cases.
ASTM D – Wide-Width Geotextiles
This test method is applicable to most geotextiles that include woven fabrics, nonwoven astj, layered fabrics, knit fabrics, and felts that are used for geotextile application. Measure the force and the corresponding elongation with respect to the force axis.
While such a procedure cannot be accepted in cases of dispute, it may be sufficient in routine testing to expose the material to the standard atmosphere for testing for a reasonable period of time before the specimens are tested. In any event, the procedure described in Section 10 of this test axtm for obtaining wide-width strip tensile strength must be maintained.
We offer machines, apparatus, testers, tensile grips, test fixtures, clamps, holders, jigs, faces, jaws, extensometers, environmental and humidity chambers, furnaces, baths and custom solutions for unique applications. It is used with a constant rate of extension type tension apparatus.
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 4d595 Note 6.