Company News

Tensar International wins Highway Industry Product of the Year award in UK

October 20, 2017

In a ceremony at the Royal Lancaster Hotel in London, England, on the night of Oct. 18, 2017, Tensar International took home the Highways Award for the Highway Industry Product of the Year. The company was honored for its Spectra Pavement Optimisation System. The system is a comprehensive approach to optimizing pavement structure based on …

Industry News

Nashville mayor announces $5.2 billion transportation plan

October 19, 2017

In what would be the largest capital investment in Nashville, Tenn., history, on Oct. 17, 2017, Mayor Megan Barry unveiled “Let’s Move Nashville: Metro’s Transportation Solution,” a plan that the city said aligns with the state IMPROVE Act passed earlier this year. In early 2018, Nashville Metro Council members will be asked to put the …

Industry News

Geosynthetics 2019 conference sets theme

October 18, 2017

On Oct. 17, 2017, Barbara J. Connett, secretary general of the Geosynthetics 2019 conference in Houston, Texas, announced that the theme of the preeminent geosynthetics conference will be “Geosynthetics: Strengthening Infrastructure Safety, Reliability, and Longevity.” The conference, to be held Feb. 10–13, 2019, at the Marriott Marquis Houston and sponsored by the Industrial Fabrics Association …

Industry News

Commerce Dept. to discuss textile industry assessment findings in October 18 Webinar

October 17, 2017

In 2016, the U.S. Commerce Department’s Bureau of Industry and Security (BIS) undertook its first comprehensive survey and assessment of the health and competitiveness of the U.S. textile, apparel, and footwear industry since 2003.  The BIS team is now prepared to share preliminary findings of this critically important study that will be unveiled later this …

Industry News

IFAI honors GMA executive council members with Outstanding Volunteer Awards 

October 17, 2017

On Sept. 26, 2017, at IFAI Expo in New Orleans, La., Industrial Fabrics Association International (IFAI) board vice chair and incoming chair Steve L. Ellington of Trivantage LLC of Glen Raven, N.C., presented two Geosynthetic Materials Association (GMA) executive council members with IFAI’s 2017 Outstanding Volunteer Award. IFAI honored the efforts of Daniel Selander of …

Industry News

TxDOT uses AquaDam on flooded roadways affected by Hurricane Harvey

October 16, 2017

After Hurricane Harvey made landfall on Aug. 25, 2017, and devastated cities along the Texas coastline, the Texas Department of Transportation (TxDOT) quickly moved to mitigate extreme flooding as the storm moved north toward Houston and Beaumont, TxDOT said in Oct. 11, 2017, press release. With waters rising, TxDOT crews from several area districts received …

Events

Register now! GMA Fall Lobby Day is Oct. 24–25 in Washington, D.C.

October 13, 2017

The Geosynthetic Materials Association (GMA) will host Fall Lobby Day Oct. 24–25, 2017, in Washington, D.C. GMA encourages members and interested nonmembers to attend. There is no registration fee for GMA members. Nonmembers pay a fee of $1,000. Registration is open; for questions or to RSVP, please contact Janelle Wells at jawells@ifai.com. GMA continues to …

Industry News

Caltrans releases draft state rail plan

October 13, 2017

On Oct. 11, 2017, the California Department of Transportation (Caltrans) released a public draft of the California State Rail Plan, which Caltrans said outlines a new framework for California’s rail network. Caltrans said the rail plan sets the stage for new and better rail, and multimodal and community connections in the state for the next …

Company News

TenCate hires Mac Millan

October 12, 2017

TenCate announced early October the hiring of Ashley Mac Millan, P.E., as Engineering Business Manager—Northwest (Utah, Idaho, Ore., Wash.). Mac Millan has a BS in civil engineering from Worcester Polytechnic Institute and brings more than seven years of geotechnical engineering experience to TenCate. She has served as a technical expert on mechanically stabilized earth structures, …

Industry News

GMA and FGI present webinar on fabrication, installation and testing of geomembranes

October 10, 2017

On Nov. 7, 2017, the Geosynthetic Materials Association (GMA) and the Fabricated Geomembrane Institute (GFI) will offer the webinar “Fabrication, Installation and Testing of Geomembranes” discussing the types of geomembranes that can be fabricated in the factory and subsequently transported to the field for installation and testing. The webinar begins at 12:00 p.m. EST and …

Feature

GWFV walls and slopes

October 1, 2017

New patented technology is available to construct geosynthetic wrap-face vegetated (GWFV) retaining walls and reinforced soil slopes using a pyramidal-woven, high-performance turf reinforcement mat (HPTRM) in conjunction with fiber-composite internal braces. This wrap-face system eliminates the need for temporary external bracing (formwork) or for facing elements comprised of metallic wire-frame units, which traditionally have served …

Feature

Part 1: Controlling uplifting gas bubbles in exposed geomembrane-lined ponds

October 1, 2017

There is a substantial legacy of literature devoted to the design, construction and operation of geomembrane-lined ponds, with perhaps the best and most complete reference being 34 years old by Giroud (1983). Even with this long history, there continue to be problems and failures with lined ponds. One of the problems continuing to plague the …

Feature

The durability of exposed geomembrane covers

October 1, 2017

The most frequently asked question by people in the geosynthetics world is how long is the anticipated lifetime of geosynthetics. So much so that of the more than 3,000 questions submitted to the GMA Techline since it began in 2004, 591 (19.7%) have been on lifetime, aka durability. Of these, 49% were on buried lifetime, …

Feature

GMA Techline

October 1, 2017

Welding HDPE to PVC and more Q: I would appreciate any input you have on these questions: Can a high-density polyethylene (HDPE) geomembrane (GM) be welded to a PVC geomembrane? I am looking to connect a geomembrane to a building foundation. Based on some research, I have found the following options: bolt the geomembrane to …

Feature

Part 2: The regulation of CCR in the United States: Geosynthetics and barriers

October 1, 2017

As discussed in Part 1 of “The Regulation of CCR in the United States,” for the first time in decades, nationwide regulation of CCR (coal combustion residuals) surface impoundments expands the regulated use of geosynthetic materials. While the CCR Rule (2015) allows continued operation of existing CCR surface impoundments, it provides criteria for the disposition …

Feature

Part 1: The regulation of CCR in the United States: Geosynthetics and barriers

August 1, 2017

The regulation of coal ash (coal combustion residuals or CCR) has significantly expanded the market for geosynthetics within the United States. Further, there is interest in these regulations around the globe in every country using coal as an energy source. These regulations are the result of recent environmental incidents. The regulations call for the increased …

Feature Members only content

GMA Techline

August 1, 2017

Liner repair? Pullout tests? Sewn seams? Shear strength of sludges? Geomembrane liner repair Q: I have a facility that has submitted liner repair documentation for the repair of a high-density polyethylene (HDPE) liner for a leachate/stormwater pond at an industrial landfill site. The repairs were performed using either a patch or, for indentations and small …

Feature

CCR management using geotextile tubes

August 1, 2017

Introduction Since the late 1800s, coal has played a leading role in U.S. production of electrical energy. Coal-fired power plants have provided reliable electrical power from the earliest days when power plants were run with hand-fed coal to heat boilers to produce steam. The introduction of pulverized coal led to improvements in the electrical-generation process …

Feature

Using geosynthetics for macroencapsulation for CCR on-site clean closure

August 1, 2017

Coal combustion residuals (CCR) have been used for many years in the construction of berms and engineered structural fill applications, including embankments for highways, dikes, and levees. However, large, unencapsulated structural fill projects have become a focus of environmental concerns due to potential leaching of metals and structural failures. Cap-in-place of CCR surface impoundments is …

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, …

Feature

GMA Techline

October 1, 2017

Welding HDPE to PVC and more Q: I would appreciate any input you have on these questions: Can a high-density polyethylene (HDPE) geomembrane (GM) be welded to a PVC geomembrane? I am looking to connect a geomembrane to a building foundation. Based on some research, I have found the following options: bolt the geomembrane to …

Feature Members only content

GMA Techline

August 1, 2017

Liner repair? Pullout tests? Sewn seams? Shear strength of sludges? Geomembrane liner repair Q: I have a facility that has submitted liner repair documentation for the repair of a high-density polyethylene (HDPE) liner for a leachate/stormwater pond at an industrial landfill site. The repairs were performed using either a patch or, for indentations and small …

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 …

Company News

Tensar International wins Highway Industry Product of the Year award in UK

October 20, 2017

In a ceremony at the Royal Lancaster Hotel in London, England, on the night of Oct. 18, 2017, Tensar International took home the Highways Award for the Highway Industry Product of the Year. The company was honored for its Spectra Pavement Optimisation System. The system is a comprehensive approach to optimizing pavement structure based on …

Industry News

Nashville mayor announces $5.2 billion transportation plan

October 19, 2017

In what would be the largest capital investment in Nashville, Tenn., history, on Oct. 17, 2017, Mayor Megan Barry unveiled “Let’s Move Nashville: Metro’s Transportation Solution,” a plan that the city said aligns with the state IMPROVE Act passed earlier this year. In early 2018, Nashville Metro Council members will be asked to put the …

Industry News

Geosynthetics 2019 conference sets theme

October 18, 2017

On Oct. 17, 2017, Barbara J. Connett, secretary general of the Geosynthetics 2019 conference in Houston, Texas, announced that the theme of the preeminent geosynthetics conference will be “Geosynthetics: Strengthening Infrastructure Safety, Reliability, and Longevity.” The conference, to be held Feb. 10–13, 2019, at the Marriott Marquis Houston and sponsored by the Industrial Fabrics Association …

Industry News

Commerce Dept. to discuss textile industry assessment findings in October 18 Webinar

October 17, 2017

In 2016, the U.S. Commerce Department’s Bureau of Industry and Security (BIS) undertook its first comprehensive survey and assessment of the health and competitiveness of the U.S. textile, apparel, and footwear industry since 2003.  The BIS team is now prepared to share preliminary findings of this critically important study that will be unveiled later this …

Industry News

IFAI honors GMA executive council members with Outstanding Volunteer Awards 

October 17, 2017

On Sept. 26, 2017, at IFAI Expo in New Orleans, La., Industrial Fabrics Association International (IFAI) board vice chair and incoming chair Steve L. Ellington of Trivantage LLC of Glen Raven, N.C., presented two Geosynthetic Materials Association (GMA) executive council members with IFAI’s 2017 Outstanding Volunteer Award. IFAI honored the efforts of Daniel Selander of …

Industry News

TxDOT uses AquaDam on flooded roadways affected by Hurricane Harvey

October 16, 2017

After Hurricane Harvey made landfall on Aug. 25, 2017, and devastated cities along the Texas coastline, the Texas Department of Transportation (TxDOT) quickly moved to mitigate extreme flooding as the storm moved north toward Houston and Beaumont, TxDOT said in Oct. 11, 2017, press release. With waters rising, TxDOT crews from several area districts received …

Events

Register now! GMA Fall Lobby Day is Oct. 24–25 in Washington, D.C.

October 13, 2017

The Geosynthetic Materials Association (GMA) will host Fall Lobby Day Oct. 24–25, 2017, in Washington, D.C. GMA encourages members and interested nonmembers to attend. There is no registration fee for GMA members. Nonmembers pay a fee of $1,000. Registration is open; for questions or to RSVP, please contact Janelle Wells at jawells@ifai.com. GMA continues to …

Industry News

Caltrans releases draft state rail plan

October 13, 2017

On Oct. 11, 2017, the California Department of Transportation (Caltrans) released a public draft of the California State Rail Plan, which Caltrans said outlines a new framework for California’s rail network. Caltrans said the rail plan sets the stage for new and better rail, and multimodal and community connections in the state for the next …

Company News

TenCate hires Mac Millan

October 12, 2017

TenCate announced early October the hiring of Ashley Mac Millan, P.E., as Engineering Business Manager—Northwest (Utah, Idaho, Ore., Wash.). Mac Millan has a BS in civil engineering from Worcester Polytechnic Institute and brings more than seven years of geotechnical engineering experience to TenCate. She has served as a technical expert on mechanically stabilized earth structures, …

Industry News

GMA and FGI present webinar on fabrication, installation and testing of geomembranes

October 10, 2017

On Nov. 7, 2017, the Geosynthetic Materials Association (GMA) and the Fabricated Geomembrane Institute (GFI) will offer the webinar “Fabrication, Installation and Testing of Geomembranes” discussing the types of geomembranes that can be fabricated in the factory and subsequently transported to the field for installation and testing. The webinar begins at 12:00 p.m. EST and …

Feature Members only content

GMA Techline

August 1, 2017

Liner repair? Pullout tests? Sewn seams? Shear strength of sludges? Geomembrane liner repair Q: I have a facility that has submitted liner repair documentation for the repair of a high-density polyethylene (HDPE) liner for a leachate/stormwater pond at an industrial landfill site. The repairs were performed using either a patch or, for indentations and small …

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 …