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Three challenges in using SRWs and other reinforced-soil structures: Part 2B

April 1, 2008

By Michael R. Simac, P. E., and Blaise J. Fitzpatrick, P. E. Introduction While segmental retaining walls (SRWs) have been routinely used for more than 15 years now, there are still three challenging issues facing owners considering their use. What is the best way to procure, design, and then build these structures to minimize short-term …

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Three challenges in using SRWs and other reinforced-soil structures: Part 2A

February 1, 2008

By Michael R. Simac, P. E., and Blaise J. Fitzpatrick, P. E. Introduction While segmental retaining walls (SRWs) have been routinely used for more than 15 years now, there are still three challenging issues facing owners considering their use. What is the best way to procure, design, and then build these structures to minimize short-term …

Propex, NAUE reach agreement on geogrid distribution

Propex Geosynthetics has reached an agreement with NAUE GmbH & Co. KG to be the exclusive distributor for Secugrid and Combigrid biaxial geogrids in the United States. The agreement took effect Jan. 1. As the exclusive distributor of NAUE biaxial geogrids, Propex will be responsible for all sales and marketing of these products in the …

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ML Ingenieria S.A. de C.V. wins 2007 Outstanding Achievement Award

The award is part of the 2007 International Achievement Awards presented by the Industrial Fabrics Association International (IFAI). Project description This project underscored the advantages of using geogrids to build many of the biggest retaining walls ever constructed in Chilpancingo, the capital city of the state of Guerrero, México. Retaining walls were designed to support …

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Flint Industries Inc. wins 2007 Outstanding Achievement Award

The award is part of the 2007 International Achievement Awards presented by the Industrial Fabrics Association International (IFAI). Project description This project involved installing a soil cap over the surface of a 55-acre sludge pond under the auspices of the Florida Department of Environmental Protection (FDEP). The capping system required the installation of high-strength woven …

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Geogrid-reinforced roads aid wind farm’s installation of giant turbines

October 1, 2007

Introduction Development of the Maple Ridge Wind Farm required stability improvement to the subgrade of 26 miles of access roads to the locations of the farm’s wind turbines. A successful road design solution resulted following the installation of 463,000yds2 of geogrid. Project site The Maple Ridge Wind Farm near Lowville in upstate New York is …

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Three challenges in using SRWs and other reinforced-soil structures: Part 1

By Michael R. Simac, P. E., and Blaise J. Fitzpatrick, P. E. Introduction While segmental retaining walls (SRWs) have been routinely used for more than 15 years now, there are still three challenging issues facing owners considering their use. What is the best way to procure, design, and then build these structures to minimize short-term …

Use of geosynthetics in the mining and mineral processing industry

August 1, 2007

By Karin Renken, David Mchaina, Ernest Yanful Introduction This article gives a brief overview and a summary of the results of research work conducted under the 2003 North American Geosynthetics (NAGS) Award of Merit. The NAGS awards were initiated in 1989 as an industry sponsored program to recognize excellence in the state of the art …

Background and most recent GRI standards

By Bob Koerner 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. Rob Swan generated our first formalized test methods with what became GRI-GG1: “Geogrid Rib Tensile Strength” (now ASTM D6637) and GRI-GG2: …

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Expedient site construction provided housing for Mississippi residents displaced by Katrina

June 1, 2007

Geosynthetic materials helped in offering a solution for the construction of temporary roads and group housing sites atop wet and soft soil conditions. By Lloyd W. Young Jr. and Robert E. Jordan Introduction The objective of this article is to describe the use of geosynthetics during the preparation of temporary group housing sites in southern …