Industry News

President Trump issues executive order establishing advisory council on infrastructure

July 24, 2017

President Donald J. Trump signed an executive order July 19, 2017, ordering formation of a Presidential Advisory Council on Infrastructure in the Department of Commerce. The advisory council is tasked with prioritizing U.S. infrastructure needs, accelerating the preconstruction approval process, developing funding options, developing methods to increase public-private partnerships, and promoting advanced manufacturing and infrastructure-related …

Industry News

ATP Webinar: Can Your Global Supply Chain Keep a (Trade) Secret

July 24, 2017

Free to all industry professionals. In partnership with Finnegan, LLP. Manufacturers of textiles and other innovative materials are going beyond traditional features to incorporate more functional and interactive technologies into their products. To efficiently and cost-effectively respond to this enhanced scope of work, companies are frequently relying on a global supply chain of materials and …

Industry News

TRB accepting papers for 2018 Annual Meeting

July 21, 2017

The Transportation Research Board (TRB) is accepting papers for consideration for the program for the 2018 TRB Annual Meeting, January 7–11, 2018, in Washington, D.C. and for publication in the Transportation Research Record: Journal of the Transportation Research Board (TRR). All papers must be submitted in PDF format to the TRB’s paper submission website by August 1, 2017. To …

Industry News

HUESKER offers webinar on geosynthetic embankments on soft soil

July 20, 2017

HUESKER is presenting a free webinar on using geosynthetics for embankments on soft soil on August 10, 2017, at 1:30 p.m. EDT. Hosted by HUESKER Engineering Department head Lilma Schimmel, the webinar will offer an overview of solutions for embankments founded on poor soils utilizing high-strength geotextiles, geogrids and geotextile-encased columns as deep foundations. For …

Industry News

Geomembrane used at South Africa’s first black-woman-owned manganese mine

July 19, 2017

A geomembrane provided by Zambia’s Kaytech Engineered Fabrics and installed by South Africa’s Aquatan Lining System was used at the Kalagadi Mine, near Hotazel, Northern Cape province, South Africa, about 675 miles (1,085 km) northeast of Cape Town. Kalagadi is the first manganese mine owned by a South African black woman. The mine includes a …

News

TRB offers webinar on geofoam applications for slope stability

July 18, 2017

The Transportation Research Board (TRB) will conduct a webinar on July 27, 2017, from 2:00 to 3:30 p.m. EDT, that discusses ways to use geofoam to address slope-stability problems. Moderated by Mohammed Mulla of the North Carolina Department of Transportation, the webinar panel includes David Arellano of the University of Memphis, Steven Bartlett of the …

News

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

July 17, 2017

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 …

Industry News

Minneapolis-St. Paul council to accept bids for light rail extension in August

July 14, 2017

The Metropolitan Council in Minneapolis-St. Paul, Minn., announced July 13, 2017, it will begin accepting bids Aug. 15 for the largest public works project in Minnesota history, the planned Southwest Light Rail Transit (Southwest LRT) Project, from downtown Minneapolis to the western suburb of Eden Prairie. The council plans to award civil contracts this fall …

News

HUESKER coins term, releases video on geogrid “interaction flexibility”

July 13, 2017

In a press release date July 11, 2017, HUESKER expanded on the need for a newly defined aspect of geogrids—interaction flexibility—and released a video on the characteristic. The company noted that according to the current state of scientific knowledge, the key properties of effective reinforcement are adequate tensile stiffness and tensile strength coupled with good …

News

California Transportation Commission approves $593 million in funding

July 12, 2017

The California Transportation Commission (CTC) approved nearly $593 million for 124 transportation projects aimed at alleviating traffic delays, repairing aging roads and bridges, and encouraging bicycling and walking. The funding is part of a larger push to rebuild and maintain the Golden State’s infrastructure. “These projects will help us maintain and modernize California’s transportation system,” …

Containment Members only content

Achieving zero leaks on a budget with geomembranes

June 1, 2017

For more than 30 years, the geomembrane industry has been told that “all geomembranes leak” (Giroud 1984), as if this were some foregone conclusion no matter what might happen from geomembrane manufacturing to the time it is put into service. But recently, the idea of “zero leaks” has been a hot topic at industry conferences, …

Case Study

History of geosynthetics use on national forest roads

June 1, 2017

Introduction The objectives of this article are to document the long history of geosynthetic materials used in the U.S. Department of Agriculture (USDA) Forest Service and other rural roads, to document the many creative and useful ways geosynthetics have been used, and to promote the cost-effective uses of geosynthetics in road projects today, particularly on …

Case Study Members only content

Protecting geomembranes from animal damage

June 1, 2017

Resisting animal and insect attacks on geomembranes is an interesting problem. Geomembrane installers and manufacturers have had numerous geomembranes damaged by bears, deer, coyotes, birds, beavers, and ground squirrels (Figures 1 and 2). In most cases, the damage is incidental to something else the animal is seeking. Deer damage the liner with their hooves trying …

Case Study

Part 2: New design models for MSE walls and slopes

June 1, 2017

Introduction The design of many geotechnical structures is based on limit-state conditions. For example, in designing gravity walls, the load exerted by the retained soil on the wall is based on an assumed active state of stresses. That is, the wall moves sufficiently outward, enabling the retained soil to mobilize its shear strength along a …

Feature Members only content

PART 2 Functions and applications of geosynthetics in roadways

April 1, 2017

Introduction Part 1 of this article provided an overview of the various functions that geosynthetics can fulfill in roadway applications. These functions include separation, filtration, reinforcement, stiffening, drainage, hydraulic/gas barrier, and protection. Table 1 in that article identified a total of five roadway applications involving geosynthetics. For each of the five roadway applications, the table …

Feature Members only content

PART 1 ‘Geosynthetic reinforced soil 101’ leading to rational design of MSE walls and slopes

April 1, 2017

Introduction The design of many geotechnical structures is based on limit state conditions. For example, in designing gravity walls, the load exerted by the retained soil on the wall is based on an assumed active state of stresses. That is, the wall moves sufficiently outward, enabling the retained soil to mobilize its shear strength along …

Feature Members only content

Flood impact reduction and streambank repair along Spy Run Creek

April 1, 2017

Background Spy Run Creek in Fort Wayne, Ind., is a 10-mile watercourse that drains several square miles on the northwest side of Fort Wayne. Spy Run Creek empties into the St. Mary’s River in downtown Fort Wayne, just upstream from its confluence with the St. Joseph River. The St. Mary’s and the St. Joseph rivers …

Feature Members only content

Part 1: Functions and applications of geosynthetics in roadways

February 1, 2017

Introduction The geosynthetic products most commonly used in roadway systems include geotextiles (woven and nonwoven) and geogrids (biaxial and multiaxial), although erosion-control products, geocells, geonets (or geocomposite drainage products), and geomembranes have also been incorporated in a number of projects. These various types of geosynthetics can be used to fulfill one or more specific functions …

Feature Members only content

Oh no! The GCL got wet! Now what?

February 1, 2017

Authors’ note: The conditions This project started in central California in July 2014, and we watched the weather forecasts on the nightly news and we were calm. A few weeks later, the project is running longer than expected, and now we are watching the Weather Channel and reading Weather Underground and Accuweather with more interest …

GMA Techline Members only content

Questions and answers from the GMA Techline

February 1, 2017

Spraying? Shear Strength? Hydraulics? [A more] non-permeable GT? Q: I have received an inquiry for a non-permeable geotextile, which is UV-resistant and will be installed on a long slope for erosion control. Could you kindly recommend a product that would meet these requirements or a solution for this application? Your assistance with this is much …

GMA Techline Members only content

Questions and answers from the GMA Techline

February 1, 2017

Spraying? Shear Strength? Hydraulics? [A more] non-permeable GT? Q: I have received an inquiry for a non-permeable geotextile, which is UV-resistant and will be installed on a long slope for erosion control. Could you kindly recommend a product that would meet these requirements or a solution for this application? Your assistance with this is much …

GMA Techline Members only content

Questions and answers from the GMA Techline

August 1, 2016

Geosynthetic filter failure Q: I am interested in your upcoming webinar on geosynthetic filters and was hoping to get a little clarification on the content. I’m most interested in how geotextile fabrics are used with riprap but I also understand these fabrics are perhaps more commonly associated with roadway construction. How much does this webinar …

GMA Techline Members only content

Recycled materials reinforcement?

June 1, 2016

Questions and answers from the GMA Techline We are soliciting information on the use of recycled materials in the reinforced zone of MSE walls. I recall you as the keeper of many case histories. Do you have any success or failure stories about such recycled content in a reinforced zone? I’m mindful of chemical attack …

GMA Techline Members only content

Weld or sew?

June 1, 2016

Questions and answers from the GMA Techline We have a liner contractor who would like to wedge-weld geotextile rather than sew it. The material is simply a cushion layer below the 40-mil geomembrane and the contractor is concerned the sewn seams will affect wedge welding of the above geomembrane. Do you have a recommendation on …

GMA Techline Members only content

Strength test?

June 1, 2016

Questions and answers from the GMA Techline Something that has always puzzled me while performing the CQA for liners is the strength test for a weld using the extrusion gun. I always thought that if the weld does not pass for elongation, that has more to do with the sheet than how well the weld …

GMA Techline Members only content

Three of the most difficult questions

June 1, 2016

From the GMA Techline Q-and-A 1. Mold inside drainage layer? Q: Recently there has been a greater demand for sustainable projects in Southern California and I was glad to see published in Geosynthetics magazine “Geosynthetics: The science that makes green roofs work” (June/July 2014, Vol. 32, No. 3). I am curious if there are any …

GMA Techline Members only content

Lining of soil embankment?

June 1, 2016

Questions and answers from the GMA Techline I have a question concerning lining systems in embankment dams and want to ask for your advice (from your experience only, no need for any calculations). There is a wastewater reservoir built of clay, with a single HDPE geomembrane on top of the clay (i.e., a kind of …

GMA Techline Members only content

Geotextile question

February 1, 2016

We have a geotextile AOS requirement of 0.15mm for which we have recommended a 10-ounce geotextile to our client. Because our client has an abundance of 8-ounce geotextile on-site, he would prefer to make use of it in place of the recommended 10-ounce. My question to you is this: Can two layers of 8-ounce geotextile …

GMA Techline Members only content

Reinforcement deformations

February 1, 2016

You made a presentation in Peru where you talked about a new method to calculate deformations on reinforced embankments. Now I am working on a project where the foundation needs to be, in part, over consolidated tailings. Even though we are putting rockfill embedded on the tailings, our pseudo-static analyses result in a FS of …

GMA Techline Members only content

MQA and GRI specs

February 1, 2016

There is much inconsistency regarding the definition of a production batch quantity for geomembranes and how this relates to MQA sampling frequencies. What is the intent of the GRI specifications? Maggie | Australia Maggie, Regarding MQC—the factory production of like material—the GRI specifications give the frequencies of each particular test. These values were the subject …

Industry News

President Trump issues executive order establishing advisory council on infrastructure

July 24, 2017

President Donald J. Trump signed an executive order July 19, 2017, ordering formation of a Presidential Advisory Council on Infrastructure in the Department of Commerce. The advisory council is tasked with prioritizing U.S. infrastructure needs, accelerating the preconstruction approval process, developing funding options, developing methods to increase public-private partnerships, and promoting advanced manufacturing and infrastructure-related …

Industry News

ATP Webinar: Can Your Global Supply Chain Keep a (Trade) Secret

July 24, 2017

Free to all industry professionals. In partnership with Finnegan, LLP. Manufacturers of textiles and other innovative materials are going beyond traditional features to incorporate more functional and interactive technologies into their products. To efficiently and cost-effectively respond to this enhanced scope of work, companies are frequently relying on a global supply chain of materials and …

Industry News

TRB accepting papers for 2018 Annual Meeting

July 21, 2017

The Transportation Research Board (TRB) is accepting papers for consideration for the program for the 2018 TRB Annual Meeting, January 7–11, 2018, in Washington, D.C. and for publication in the Transportation Research Record: Journal of the Transportation Research Board (TRR). All papers must be submitted in PDF format to the TRB’s paper submission website by August 1, 2017. To …

Industry News

HUESKER offers webinar on geosynthetic embankments on soft soil

July 20, 2017

HUESKER is presenting a free webinar on using geosynthetics for embankments on soft soil on August 10, 2017, at 1:30 p.m. EDT. Hosted by HUESKER Engineering Department head Lilma Schimmel, the webinar will offer an overview of solutions for embankments founded on poor soils utilizing high-strength geotextiles, geogrids and geotextile-encased columns as deep foundations. For …

Industry News

Geomembrane used at South Africa’s first black-woman-owned manganese mine

July 19, 2017

A geomembrane provided by Zambia’s Kaytech Engineered Fabrics and installed by South Africa’s Aquatan Lining System was used at the Kalagadi Mine, near Hotazel, Northern Cape province, South Africa, about 675 miles (1,085 km) northeast of Cape Town. Kalagadi is the first manganese mine owned by a South African black woman. The mine includes a …

News

TRB offers webinar on geofoam applications for slope stability

July 18, 2017

The Transportation Research Board (TRB) will conduct a webinar on July 27, 2017, from 2:00 to 3:30 p.m. EDT, that discusses ways to use geofoam to address slope-stability problems. Moderated by Mohammed Mulla of the North Carolina Department of Transportation, the webinar panel includes David Arellano of the University of Memphis, Steven Bartlett of the …

News

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

July 17, 2017

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 …

Industry News

Minneapolis-St. Paul council to accept bids for light rail extension in August

July 14, 2017

The Metropolitan Council in Minneapolis-St. Paul, Minn., announced July 13, 2017, it will begin accepting bids Aug. 15 for the largest public works project in Minnesota history, the planned Southwest Light Rail Transit (Southwest LRT) Project, from downtown Minneapolis to the western suburb of Eden Prairie. The council plans to award civil contracts this fall …

News

HUESKER coins term, releases video on geogrid “interaction flexibility”

July 13, 2017

In a press release date July 11, 2017, HUESKER expanded on the need for a newly defined aspect of geogrids—interaction flexibility—and released a video on the characteristic. The company noted that according to the current state of scientific knowledge, the key properties of effective reinforcement are adequate tensile stiffness and tensile strength coupled with good …

News

California Transportation Commission approves $593 million in funding

July 12, 2017

The California Transportation Commission (CTC) approved nearly $593 million for 124 transportation projects aimed at alleviating traffic delays, repairing aging roads and bridges, and encouraging bicycling and walking. The funding is part of a larger push to rebuild and maintain the Golden State’s infrastructure. “These projects will help us maintain and modernize California’s transportation system,” …

GMA Techline Members only content

Questions and answers from the GMA Techline

February 1, 2017

Spraying? Shear Strength? Hydraulics? [A more] non-permeable GT? Q: I have received an inquiry for a non-permeable geotextile, which is UV-resistant and will be installed on a long slope for erosion control. Could you kindly recommend a product that would meet these requirements or a solution for this application? Your assistance with this is much …

GMA Techline Members only content

Questions and answers from the GMA Techline

August 1, 2016

Geosynthetic filter failure Q: I am interested in your upcoming webinar on geosynthetic filters and was hoping to get a little clarification on the content. I’m most interested in how geotextile fabrics are used with riprap but I also understand these fabrics are perhaps more commonly associated with roadway construction. How much does this webinar …

GMA Techline Members only content

Recycled materials reinforcement?

June 1, 2016

Questions and answers from the GMA Techline We are soliciting information on the use of recycled materials in the reinforced zone of MSE walls. I recall you as the keeper of many case histories. Do you have any success or failure stories about such recycled content in a reinforced zone? I’m mindful of chemical attack …

GMA Techline Members only content

Weld or sew?

June 1, 2016

Questions and answers from the GMA Techline We have a liner contractor who would like to wedge-weld geotextile rather than sew it. The material is simply a cushion layer below the 40-mil geomembrane and the contractor is concerned the sewn seams will affect wedge welding of the above geomembrane. Do you have a recommendation on …

GMA Techline Members only content

Strength test?

June 1, 2016

Questions and answers from the GMA Techline Something that has always puzzled me while performing the CQA for liners is the strength test for a weld using the extrusion gun. I always thought that if the weld does not pass for elongation, that has more to do with the sheet than how well the weld …

GMA Techline Members only content

Three of the most difficult questions

June 1, 2016

From the GMA Techline Q-and-A 1. Mold inside drainage layer? Q: Recently there has been a greater demand for sustainable projects in Southern California and I was glad to see published in Geosynthetics magazine “Geosynthetics: The science that makes green roofs work” (June/July 2014, Vol. 32, No. 3). I am curious if there are any …

GMA Techline Members only content

Lining of soil embankment?

June 1, 2016

Questions and answers from the GMA Techline I have a question concerning lining systems in embankment dams and want to ask for your advice (from your experience only, no need for any calculations). There is a wastewater reservoir built of clay, with a single HDPE geomembrane on top of the clay (i.e., a kind of …

GMA Techline Members only content

Geotextile question

February 1, 2016

We have a geotextile AOS requirement of 0.15mm for which we have recommended a 10-ounce geotextile to our client. Because our client has an abundance of 8-ounce geotextile on-site, he would prefer to make use of it in place of the recommended 10-ounce. My question to you is this: Can two layers of 8-ounce geotextile …

GMA Techline Members only content

Reinforcement deformations

February 1, 2016

You made a presentation in Peru where you talked about a new method to calculate deformations on reinforced embankments. Now I am working on a project where the foundation needs to be, in part, over consolidated tailings. Even though we are putting rockfill embedded on the tailings, our pseudo-static analyses result in a FS of …

GMA Techline Members only content

MQA and GRI specs

February 1, 2016

There is much inconsistency regarding the definition of a production batch quantity for geomembranes and how this relates to MQA sampling frequencies. What is the intent of the GRI specifications? Maggie | Australia Maggie, Regarding MQC—the factory production of like material—the GRI specifications give the frequencies of each particular test. These values were the subject …