Specifications

Page 2 of 2 (28 results total)

  • GRI Standards

    April 1, 2008

    We have developed and published about 100 GRI Standards since 1985.

  • Slack calculations

    April 1, 2008

    The subject of calculating slack in geomembranes for the purpose of backfilling, and then having the lower backfilled temperature bring the GM back into a nonwrinkled condition, is something I am not proud of at this time.

  • Photo 1 | Photo courtesy of FHWA.

    The GRS bridges of Defiance County

    April 1, 2008

    Three years ago, the Federal Highway Administration (FHWA) teamed up with local officials in Defiance County, Ohio, to test a new prototype geosynthetic-reinforced soil (GRS) integrated bridge system.

  • Transmissivity: An ambiguous contradiction

    February 1, 2008

    Specifying the transmissivity of a drainage product seems straightforward.

  • ASTM geosynthetics committees developing proposed new standards

    October 1, 2007

    Three subcommittees of ASTM International Committee D35 on Geosynthetics are currently developing several proposed new standards.

  • Background and most recent GRI standards

    August 1, 2007

    In the 1980s, while supervising graduate research students in their geosynthetics theses topics, the issue of writing generic and standardized procedures arose in this (quite new at the time) geosynthetics field.

  • AOS vs. EOS

    June 1, 2007

    The U.S. Army Corps of Engineers developed AOS in 1972 on the basis of sieving glass beads through woven monofilament fabrics (which was all that they used).

  • ASTM Vol. 04.13 Geosynthetics

    June 1, 2007

    Volume 04.13 focuses on the mechanical, endurance, permeability, and filtration properties of geosynthetics.

  • Geotextile fabric

    June 1, 2007

    The association of state highway officials (called AASHTO) has a neat specification for these applications under the designation of AASHTO M288.

  • Product specification

    June 1, 2007

    AASHTO has a generic specification for this particular application.

  • ASTM committee developing drain test

    April 1, 2007

    ASTM International Committee D35 on Geosynthetics is currently developing a proposed new standard that covers the test procedure for evaluating the effectiveness of prefabricated vertical drains to enhance the consolidation of soils under specified conditions.

  • Membrane seams addressed in new ASTM standard

    February 1, 2007

    The increased use of geomembranes as barrier materials to restrict liquid migration created a need for a test method to evaluate the quality of geomembrane seams produced by tape methods.

  • Geotextile specifications

    October 1, 2006

    AASHTO M288 that addresses various highway-related applications such as drainage and erosion control.

  • Geosynthetics Market Report

    Sponsored by Geosynthetic Materials Association

    The most comprehensive and accurate measure of the geosynthetics market in the U. S. and Canada is now available from GMA. Here are some highlights.

    Geosynthetics manufacturing

    The Geosynthetics Market Report notes that there are currently 40+ geosynthetics manufacturing companies in the U.S. and Canada, with more than 50% located in southeastern part of the U.S. and Texas. There are more than 12,000 U.S. jobs in geosynthetics manufacturing, distribution, fabrication and installation.

    Sales

    Sales of geosynthetic materials are generally through distribution networks. Some distributors are exclusive or “captive” to one manufacturer, but most are not. Some manufacturers may sell directly to some project owners (usually when very large quantities are involved).

    Industry support

    Nearly all installers of geosynthetic materials in the U.S. and Canada are trained and certified, many through IAGI (International Association of Geosynthetics Installers).

    The geosynthetics industry is supported by testing companies that can verify the specifications of geosynthetic materials. And the industry is further supported by a large and active network of engineering consultants and also many academics (professors).

    Statistics

    • In 2007, U.S. geosynthetics sales totaled $1.89 billion.
    • Geosynthetic materials represent ~0.33% of U.S. transportation spending.
    • Knowledgeable estimates project that amount has the potential utilization.

    This report, copyright 2009, quantifies the production of geotextiles, geogrids, geomembranes, and drainage composites manufactured in the U.S. and Canada, and also includes a directory of manufacturers. Purchase this report at GMA Geosynthetics Market Report.