Company News

Titan Environmental joins GMA

June 22, 2017

Titan Environmental Containment of Ile des Chenes, Manitoba, Canada, has joined the Geosynthetics Materials Association (GMA). Titan specializes in the supply and installation of high-quality geosynthetic materials, storage tanks, and specialty civil construction products that help manage and protect the environment. Chantal Lambert is the representative to GMA. The company operates across Canada as Titan …

Industry News

IGS–NA to host geohydraulics meetings

June 16, 2017

The Technical Committee on Hydraulics of the North American Chapter of the International Geosynthetics Society (IGS–NA) will host two interrelated events in New Orleans, La., Nov. 7–9, 2017, that IGS–NA says are certain to deliver compelling technical progress and serve as an educational service to the engineering and construction communities at large.    Event 1: …

Industry News

ARTBA hosts state transportation funding workshop

June 15, 2017

The American Road & Transportation Association (ARTBA) hosts the workshop “State Transportation Funding Trends Explored at the 4th annual National Workshop for State & Local Transportation Advocates,” on July 12, 2017, at the Hyatt Regency Washington, D.C. According to ARTBA editorial director Mark Holan, last year, American voters passed three quarters of more than 360 …

Industry News

Ming Zhu to head Watershed’s engineering staff

June 14, 2017

In a press release issued June 14, Atlanta-based Watershed Geo announced that Dr. Ming Zhu has joined its engineering staff. Zhu will assume the role of director of engineering services, overseeing the company’s technical operations for existing products and the development of new product offerings. The press release noted that Zhu brings more than 11 …

Industry News

Titan Environmental opens office in Houston and expands sales force

June 13, 2017

Titan Environmental USA announced the establishment of a new location in the Brittmoore Tanner Office Park in Houston, Texas. A grand opening celebration, which will include a crawfish boil, is planned for Friday, June 16, starting at 4:00 p.m. The company also hired two new staff members to be focused on sales and office administration. …

Industry News

GSI offers webinar on predicting longevity of covered and exposed geosynthetics

June 12, 2017

The Geosynthetic Institute (GSI) will offer a webinar on “Lifetime Predictions of Covered and Exposed Geosynthetics,” on June 14, 2017, from 11:30 a.m. to 1 p.m. EDT. A most frequently asked question regarding all types of geosynthetics is, “How long will they last?” This webinar answers the question for exposed geotextiles and geomembranes assuming that …

Industry News

Your geo questions answered on the GMA Techline

June 7, 2017

Looking for answers to your geosynthetics technical questions? Contact the Geosynthetics Materials Association (GMA) Techline for thorough answers to the most detailed questions. Dr. Robert M. Koerner, who has more than 40 years of experience teaching, writing about, researching, and consulting on geosynthetics, responds to questions that range from which geosynthetic to use for a …

Industry News

FAA awards $527.8 million in grants to airports

June 6, 2017

U.S. Department of Transportation (USDOT) secretary Elaine Chao announced the Federal Aviation Administration (FAA) will award $527.8 million in airport infrastructure grants to 584 airports across the United States as part of the FAA’s Airport Improvement Program (AIP). “The Airport Improvement Program helps to maintain our aviation infrastructure and supports safety, capacity, security, and environmental …

Industry News

PennDOT announces $550 million in highway and bridge improvements

June 5, 2017

Democratic Pennsylvania Gov. Tom Wolf and the Pennsylvania Department of Transportation (PennDOT) announced that more than $550 million in highway and bridge improvements will begin or be bid across the Philadelphia region during the 2017 construction season, bringing the region’s total contract work this year to roughly 125 projects worth $2.2 billion. “The funding allocated …

Industry News

Strata joins GMA Executive Council; New members join GMA

June 2, 2017

Strata Systems Inc. has joined the GMA Executive Council. A division of Glen Raven Inc., Strata is a global manufacturer and distributor of advanced soil-reinforcement solutions headquartered in Cumming, Ga. Mike Bernardi, director of engineering for Strata Systems Inc. is the company’s primary liaison on the GMA Executive Council. Strata’s geosynthetic products deliver system solutions …

Containment

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 …

Company News

Titan Environmental joins GMA

June 22, 2017

Titan Environmental Containment of Ile des Chenes, Manitoba, Canada, has joined the Geosynthetics Materials Association (GMA). Titan specializes in the supply and installation of high-quality geosynthetic materials, storage tanks, and specialty civil construction products that help manage and protect the environment. Chantal Lambert is the representative to GMA. The company operates across Canada as Titan …

Industry News

IGS–NA to host geohydraulics meetings

June 16, 2017

The Technical Committee on Hydraulics of the North American Chapter of the International Geosynthetics Society (IGS–NA) will host two interrelated events in New Orleans, La., Nov. 7–9, 2017, that IGS–NA says are certain to deliver compelling technical progress and serve as an educational service to the engineering and construction communities at large.    Event 1: …

Industry News

ARTBA hosts state transportation funding workshop

June 15, 2017

The American Road & Transportation Association (ARTBA) hosts the workshop “State Transportation Funding Trends Explored at the 4th annual National Workshop for State & Local Transportation Advocates,” on July 12, 2017, at the Hyatt Regency Washington, D.C. According to ARTBA editorial director Mark Holan, last year, American voters passed three quarters of more than 360 …

Industry News

Ming Zhu to head Watershed’s engineering staff

June 14, 2017

In a press release issued June 14, Atlanta-based Watershed Geo announced that Dr. Ming Zhu has joined its engineering staff. Zhu will assume the role of director of engineering services, overseeing the company’s technical operations for existing products and the development of new product offerings. The press release noted that Zhu brings more than 11 …

Industry News

Titan Environmental opens office in Houston and expands sales force

June 13, 2017

Titan Environmental USA announced the establishment of a new location in the Brittmoore Tanner Office Park in Houston, Texas. A grand opening celebration, which will include a crawfish boil, is planned for Friday, June 16, starting at 4:00 p.m. The company also hired two new staff members to be focused on sales and office administration. …

Industry News

GSI offers webinar on predicting longevity of covered and exposed geosynthetics

June 12, 2017

The Geosynthetic Institute (GSI) will offer a webinar on “Lifetime Predictions of Covered and Exposed Geosynthetics,” on June 14, 2017, from 11:30 a.m. to 1 p.m. EDT. A most frequently asked question regarding all types of geosynthetics is, “How long will they last?” This webinar answers the question for exposed geotextiles and geomembranes assuming that …

Industry News

Your geo questions answered on the GMA Techline

June 7, 2017

Looking for answers to your geosynthetics technical questions? Contact the Geosynthetics Materials Association (GMA) Techline for thorough answers to the most detailed questions. Dr. Robert M. Koerner, who has more than 40 years of experience teaching, writing about, researching, and consulting on geosynthetics, responds to questions that range from which geosynthetic to use for a …

Industry News

FAA awards $527.8 million in grants to airports

June 6, 2017

U.S. Department of Transportation (USDOT) secretary Elaine Chao announced the Federal Aviation Administration (FAA) will award $527.8 million in airport infrastructure grants to 584 airports across the United States as part of the FAA’s Airport Improvement Program (AIP). “The Airport Improvement Program helps to maintain our aviation infrastructure and supports safety, capacity, security, and environmental …

Industry News

PennDOT announces $550 million in highway and bridge improvements

June 5, 2017

Democratic Pennsylvania Gov. Tom Wolf and the Pennsylvania Department of Transportation (PennDOT) announced that more than $550 million in highway and bridge improvements will begin or be bid across the Philadelphia region during the 2017 construction season, bringing the region’s total contract work this year to roughly 125 projects worth $2.2 billion. “The funding allocated …

Industry News

Strata joins GMA Executive Council; New members join GMA

June 2, 2017

Strata Systems Inc. has joined the GMA Executive Council. A division of Glen Raven Inc., Strata is a global manufacturer and distributor of advanced soil-reinforcement solutions headquartered in Cumming, Ga. Mike Bernardi, director of engineering for Strata Systems Inc. is the company’s primary liaison on the GMA Executive Council. Strata’s geosynthetic products deliver system solutions …

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 …