Geosynthetics: Specifications and Applications

The geosynthetic guidelines in the current 2008 Arizona Department of Transportation's (ADOT's) Specifications for Road and Bridge Construction were formulated in the late 1980s, presumably based on research data available at that time along with the available manufactured products and data. These method specifications, i.e. based solely on material properties, were developed at a time when geosynthetic use was in its infancy and there was a limited variety of products available for transportation infrastructure applications. Combined with the limited quantity of research data available at the time, this resulted in empirically derived design procedures. From the time of their development, these original specifications have since remained virtually unchanged. Over the last 20-plus years, the geosynthetic industry has made significant developments. New technologies have emerged. Now a wide range of material types, manufactured products, and composite systems are available for a variety of applications in civil engineering practice, including drainage and filtration, separation, soil reinforcement (roadway embankments, steep slopes, and walls), moisture barriers, and waste containment. Completed and continuously ongoing research projects now focus not only on material properties, but also on overall product/system characteristics and performance evaluation through lab testing, test sections, and accelerated testing, to quantify the benefits of using geosynthetics as a design/construction alternative. Based on the advances that have been made in the geosynthetic industry, and documented through research, there is a requirement to review and comprehensively update the ADOT geosynthetic specifications (geogrids, geotextiles, geomembranes, composites), to utilize and maximize the benefits of the variety of existing products available as well as newer and more innovative products being produced by the industry. This project will: (1) Do a comprehensive review of the ADOT geosynthetic specifications (actual section on geosynthetics and associated sub-sections.) (2) Update and expand the ADOT geosynthetic specifications to revise outdated test standards, and accommodate multiple products per required application, such as, soil reinforcement, separation and drainage, and, moisture barriers. This will require a comprehensive literature review of available research, and independent lab testing to evaluate the effectiveness of a product for a given application. (3) Update the current method specifications to not only address material properties, but take into consideration performance of the system for acceptance. Newer and more innovative products often may not meet the current individual index property requirements as outlined in the current specifications. There are however claims that these new products are better performing as a system relative to the performance of older products. This should be evaluated, again through a combination of a review of existing and ongoing research materials, and independent lab and field testing.


    • English


    • Status: Completed
    • Contract Numbers:


    • Sponsor Organizations:

      Federal Highway Administration

      1200 New Jersey Avenue, SE
      Washington, DC  United States  20590

      Arizona Department of Transportation

      206 South 17th Avenue
      Phoenix, AZ  United States  85007
    • Project Managers:

      Huang, Stephanie

    • Performing Organizations:

      Chalmers Engineering Services

    • Principal Investigators:

      Darmiento, Frank

    • Start Date: 20120701
    • Expected Completion Date: 0
    • Actual Completion Date: 0
    • Source Data: RiP Project 31967

    Subject/Index Terms

    Filing Info

    • Accession Number: 01566105
    • Record Type: Research project
    • Source Agency: Arizona Department of Transportation
    • Contract Numbers: 722
    • Files: RiP, STATEDOT
    • Created Date: Jun 10 2015 1:01AM