EUROLAB laboratory provides testing and compliance services within the scope of ASTM D4833 standard. The ASTM D4833 standard is used to measure the index puncture resistance of geomembranes and related products. The use of the test method may not be suitable for testing some woven geotextiles or related products with large openings, such as geonets and geogrids.
It is recommended to test geotextiles and geotextile related products using Test Method D6241.
ASTM D4833 is used to evaluate the puncture strength of sharp objects such as rocks and stones that remain in the soil. This test is typically performed on geotextiles used in the agricultural industry. Geo-textiles are used in highway and road construction as well as land reclamation projects. The material is used to maintain a barrier and prevent soil washing out during heavy rain.
There is some minor variability in this test, depending on exactly where the chamfered probe is in contact with the fabric. For this reason ASTM D6241 is often used as a backup and includes a wider 50mm round puncture application. Other puncture tests that attempt to characterize similar properties are the ball burst test under ASTM D3787 or ASTM D6797.
There are two key items for this procedure. The first is the geometry of the puncture application, which is 45 mm in a 8 degree bevel or beveled edge diamater. The second is the size of the through hole in the tightening jig.
Tightening jig and drilling application is available as a package. They use a standard 1,25" or 5/8" adapter to attach to the top and bottom of the testing machine. It is vital that the user specify sufficient capacity in advance so that the tester can actually achieve full puncture and proper calculations can be made.
There are several calculations common to most puncture tests. These include the average puncture stength, which is the average of the peak load in multiple samples of the same type. Since the textiles are not smooth according to their weaving stiffness, they should be averaged. Other calculations are centered around the variability and deviation between tests.
Values stated in SI units or inch-pound units should be considered separately as standard. The values specified in each system are not necessarily exactly equivalent; therefore, each system will be used independently of the other to ensure compliance with the standard and values from the two systems will not be combined.
This standard is not meant to address all safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to determine appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.
Our organization, EUROLAB, provides standard test method services for index puncture resistance of geomembranes and related products, within the framework of national and international standards, with its trained and expert staff and advanced technological equipment, among numerous test, measurement, analysis and evaluation studies. Contact EUROLAB to get testing service under ASTM D4833 standard.
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