News

Suits steps down and Othman named co-editor of ASTM’s Geotechnical Testing Journal

December 15, 2017

On Dec. 15, 2017, the American Society for Testing and Materials (ASTM International) announced L. David Suits is stepping down as co-editor of the Geotechnical Testing Journal (GTJ) and that Majdi Othman will assume the role of co-editor of GTJ in January 2018. Suits has been an active member of ASTM since 1978 and has …

News

IGS Awards deadline Jan. 31, 2018

December 15, 2017

Have you considered submitting a nomination for a 2018 IGS Award as a way of recognizing success and excellence? The IGS Awards will be presented in 2018 to individuals or groups of individuals who have made an outstanding contribution to the development and use of geotextiles, geomembranes, related products, or associated technologies through their scientific …

News

ASCE makes Rowe Terzaghi lecture available online

December 14, 2017

The American Society of Civil Engineers (ASCE) has made the 53rd Karl Terzaghi Lecture from 2017’s Geotechnical Frontiers conference available online. The lecture, presented by Dr. R. Kerry Rowe, is entitled “Protecting the Environment with Geosynthetics: Success and Challenges,” and was presented March 14, 2017, at the conference in Orlando, Fla. Rowe is professor and …

Feature

Geosynthetics: To protect and conserve

December 13, 2017

Geosynthetics are part of a flexible, cost-effective infrastructure that helps to treat, store and deliver clean water around the world. If you’ve had a glass of clean water today, you can likely thank a fabric-based product. Geosynthetics perform behind-the-scenes work to ensure communities have access to adequate potable water and clean waterways. Geosynthetic uses also …

Industry News

TRB offers webinar on getting the most from the TRB Annual Meeting

December 12, 2017

The Transportation Research Board (TRB) will conduct a webinar on Tuesday, Tuesday, Dec. 19, 2017, at 1:00 p.m. EST, that will help both new and returning Annual Meeting attendees get the most out of their meeting experience. The webinar will review issues related to planning for the meeting, including hotel reservations, airline reservations, and other …

Industry News

GSI offers online course on QA/QC of geosynthetics in waste containment

December 12, 2017

The Geosynthetic Institute (GSI) will offer an online course entitled “Quality Assurance/Quality Control of Geosynthetics in Waste Containment Facilities,” on Jan. 30 and 31, 2018, and Feb. 1, 2018, from 11:00 a.m. to 12:30 p.m. and from 2:00 p.m. to 3:30 p.m. EDT. This online course focuses on the quality assurance/quality control (QA/QC) of geosynthetics …

Industry News

EPA releases list of Superfund sites targeted

December 11, 2017

On Dec. 8, 2017, the U.S. Environmental Protection Agency (EPA) released a list of Superfund sites that EPA administrator Scott Pruitt has targeted for immediate and intense attention. The 21 sites on the list—from across the United States—are in direct response to the Superfund Task Force Recommendations, issued this summer, calling for this list. “By …

Industry News

IFAI Expo 2018 call for presentations

December 6, 2017

IFAI Expo 2018 is looking for presentation topic ideas and interested speakers. Expo will be held October 15-18, 2018 in Dallas, Texas. Submit now! The Call for Presentations deadline is January 12, 2018.  Categories Advanced Textiles  Shade and Weather Protection Specialty Fabrics  General Business Benefits of Presenting Build your reputation as an industry expert Share your knowledge …

Industry News

AGRU America to extrude world’s largest HDPE pipe

December 6, 2017

In a press release dated Dec. 6, 2017, AGRU America said that half a century of experience in plastics processing and a $40 million investment is what it takes to manufacture the world’s largest high-density polyethylene (HDPE) pressure pipe. AGRU had to overcome major technical challenges to achieve perfect roundness, homogeneous wall thickness and completely …

Industry News

IFAI Canada Expo 2018

December 6, 2017

Canada Expo 2018 is like no other event – a unique opportunity to meet manufacturers and businesses face-to-face and immerse yourself in new knowledge and leading edge solutions. Don’t miss your opportunity to experience the latest in the specialty fabrics industry through the sights, sounds and innovations of the exhibit floor. Register now! Dedicated Exhibit Hall Hours …

Feature

Geosynthetics: To protect and conserve

December 13, 2017

Geosynthetics are part of a flexible, cost-effective infrastructure that helps to treat, store and deliver clean water around the world. If you’ve had a glass of clean water today, you can likely thank a fabric-based product. Geosynthetics perform behind-the-scenes work to ensure communities have access to adequate potable water and clean waterways. Geosynthetic uses also …

Feature

New IFAI chairman Steve Ellington shares his vision for the Industrial Fabrics Association International

November 1, 2017

With the geopolitical challenges and opportunities the specialty fabrics industry faces, we, as an association, need to make sure that we continue to educate our members and provide them with opportunities,” says Steve Ellington, president of Trivantage LLC, Glen Raven’s distribution and marketing services subsidiary in Glen Raven, N.C. “We need to make sure that …

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

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 …

News

Suits steps down and Othman named co-editor of ASTM’s Geotechnical Testing Journal

December 15, 2017

On Dec. 15, 2017, the American Society for Testing and Materials (ASTM International) announced L. David Suits is stepping down as co-editor of the Geotechnical Testing Journal (GTJ) and that Majdi Othman will assume the role of co-editor of GTJ in January 2018. Suits has been an active member of ASTM since 1978 and has …

News

IGS Awards deadline Jan. 31, 2018

December 15, 2017

Have you considered submitting a nomination for a 2018 IGS Award as a way of recognizing success and excellence? The IGS Awards will be presented in 2018 to individuals or groups of individuals who have made an outstanding contribution to the development and use of geotextiles, geomembranes, related products, or associated technologies through their scientific …

News

ASCE makes Rowe Terzaghi lecture available online

December 14, 2017

The American Society of Civil Engineers (ASCE) has made the 53rd Karl Terzaghi Lecture from 2017’s Geotechnical Frontiers conference available online. The lecture, presented by Dr. R. Kerry Rowe, is entitled “Protecting the Environment with Geosynthetics: Success and Challenges,” and was presented March 14, 2017, at the conference in Orlando, Fla. Rowe is professor and …

Industry News

TRB offers webinar on getting the most from the TRB Annual Meeting

December 12, 2017

The Transportation Research Board (TRB) will conduct a webinar on Tuesday, Tuesday, Dec. 19, 2017, at 1:00 p.m. EST, that will help both new and returning Annual Meeting attendees get the most out of their meeting experience. The webinar will review issues related to planning for the meeting, including hotel reservations, airline reservations, and other …

Industry News

GSI offers online course on QA/QC of geosynthetics in waste containment

December 12, 2017

The Geosynthetic Institute (GSI) will offer an online course entitled “Quality Assurance/Quality Control of Geosynthetics in Waste Containment Facilities,” on Jan. 30 and 31, 2018, and Feb. 1, 2018, from 11:00 a.m. to 12:30 p.m. and from 2:00 p.m. to 3:30 p.m. EDT. This online course focuses on the quality assurance/quality control (QA/QC) of geosynthetics …

Industry News

EPA releases list of Superfund sites targeted

December 11, 2017

On Dec. 8, 2017, the U.S. Environmental Protection Agency (EPA) released a list of Superfund sites that EPA administrator Scott Pruitt has targeted for immediate and intense attention. The 21 sites on the list—from across the United States—are in direct response to the Superfund Task Force Recommendations, issued this summer, calling for this list. “By …

Industry News

IFAI Expo 2018 call for presentations

December 6, 2017

IFAI Expo 2018 is looking for presentation topic ideas and interested speakers. Expo will be held October 15-18, 2018 in Dallas, Texas. Submit now! The Call for Presentations deadline is January 12, 2018.  Categories Advanced Textiles  Shade and Weather Protection Specialty Fabrics  General Business Benefits of Presenting Build your reputation as an industry expert Share your knowledge …

Industry News

AGRU America to extrude world’s largest HDPE pipe

December 6, 2017

In a press release dated Dec. 6, 2017, AGRU America said that half a century of experience in plastics processing and a $40 million investment is what it takes to manufacture the world’s largest high-density polyethylene (HDPE) pressure pipe. AGRU had to overcome major technical challenges to achieve perfect roundness, homogeneous wall thickness and completely …

Industry News

IFAI Canada Expo 2018

December 6, 2017

Canada Expo 2018 is like no other event – a unique opportunity to meet manufacturers and businesses face-to-face and immerse yourself in new knowledge and leading edge solutions. Don’t miss your opportunity to experience the latest in the specialty fabrics industry through the sights, sounds and innovations of the exhibit floor. Register now! Dedicated Exhibit Hall Hours …

Industry News

Rhode Island DOT replaces bridge in 80 hours using GRS-IBS technology; releases video

December 5, 2017

The Rhode Island Department of Transportation (RIDOT) began work on the McCormick Quarry Bridge in East Providence on Sept. 23, 2016, using a geosynthetic reinforced soil–integrated bridge system (GRS-IBS). According to the Federal Highway Administration and RIDOT, the technique allowed crews to cut the construction time for the bridge from one year to 80 hours. …

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 …