WisDOT publishes study on ASTM D4833 and D6241 geotextile puncture test methods

July 17th, 2017 / By: / News

The Wisconsin Department of Transportation (WisDOT) and the Federal Highway Administration (FHWA) funded research into puncture test methods for geotextiles, and the report from this study is now available online.

Various tests are conducted to assess and classify a geotextile’s suitability for different applications. One of these tests is the puncture strength test. This test evaluates the ability of geotextiles to withstand stresses and loads during construction, which is among the severe conditions that geotextiles can experience.

The American Society for Testing and Materials (ASTM) has recently replaced the standard pin puncture strength test, D4833, with the CBR puncture strength test, D6241. However, many departments of transportation (DOTs) throughout the country and the Federal Highway Administration still refer to D4833. Other state DOTs refer to both D4833 and D6241, or provide a list of alternative test methods to be considered in place of either of these tests. This inconsistency is the result of a missing connection between the old and new ASTMs.

Conducted by researchers from the Department of Civil and Environmental Engineering at the University of Wisconsin—Milwaukee, the study sought to correlate the CBR and pin puncture strengths for various categories of geotextiles, regardless of weave type and mass per unit area. Subsequent to this, deterioration of geotextiles due to freeze‐thaw conditioning as well as ultraviolet light exposure was investigated. Puncture resistances of materials with like mass per unit area and base material but with different weave type were also examined. Various types of geotextiles (nonwoven and woven) were subjected to testing in accordance with ASTM D4833 and ASTM D6241 standard procedures.

You can read and download the full report at http://wisconsindot.gov/documents2/research/0092-15-07-final-report.pdf.

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