Though specialized geotextile fabrics have been used in the construction of concrete highways in the United States for more than a decade, their long-term influence on the pavements has not been well understood.
With a shared interest in learning more, Iowa DOT and 34 other states jointly commissioned a research project to study three different types of geotextiles and their long-term effects on concrete pavements.
Using sections of Iowa’s Buchanan County Highway D-16 for testing, researchers evaluated stress and deformation of the concrete and compared road sections constructed with each of the geotextile fabrics and sections built using traditional methods.
The resulting data gives the states greater insight when it comes to deciding which projects are well-suited for using geotextiles and demonstrated the reliability of the on-site testing techniques.
Learn more about this project in Iowa DOT’s new research brief, and check out other Iowa DOT research efforts on the News & Publications page.
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