Industry News

Geo firms eyeing Vietnam market

Intrigued by Vietnam’s planned emphasis on infrastructure development, foreign geotechnical firms are seeking support roles in the many potential projects on Vietnam’s horizon. Geonia, a South Korea woven geotextiles manufacturing firm, is expecting a surge in demand for this product. “Vietnam’s government is boosting the construction of infrastructure nationwide, which is generating high demand for …

Industry News

Learn about TZD (Toward Zero Deaths) Dec. 8

Join the National Association of County Engineers (NACE) and the National Center for Rural Road Safety for a free 1.5-hour online webinar on the Toward Zero Deaths (TZD) national strategy. This webinar is directed toward local engineers, road managers, and local representatives with road and transportation responsibilities, and will provide information that can be used …

Industry News

Weisenberger is new sales manager at Seaman

In a press release issued last week, Wooster, Ohio-based Seaman Corp. announced that Dan Weisenberger has joined Seaman Industrial Products as sales manager for the southern region of the United States. The release noted that Weisenberger was previously a district sales manager for Saint-Gobain Coated Fabrics, and he brings more than two decades of polymer and …

Industry News

Next GSI webinar Dec. 14

December 1, 2016 GSI W-4 webinar: “Mechanically stabilized earth (MSE) wall, berm, and slope construction inspection” 11:30 a.m.–1 p.m. (ET) Wednesday, Dec. 14, 2016 GSI members: $200 USD Non-GSI members: $250 USD Webinar Overview                                                                                                             The inspection (aka, monitoring) of MSE wall, berm and slope construction using geosynthetic reinforcement is absolutely essential for providing a safe …

Industry News

Cantore, Zeller: Keynoters for EC-’17

Cantore, Zeller: Keynoters for EC-’17 “Is the Sky Falling?” is the title of the opening keynote by Jim Cantore at the 2017 edition of the International Erosion Control Association’s Environmental Connection-’17 conference in Atlanta, Wednesday, Feb. 22, 2017. Cantore, the well-known meteorologist with the Weather Channel, will discuss changes in weather patterns, predictions for the …

Industry News

In Memoriam

Kathy Brazeau ‘Bentomat Queen’ Kathleen (Kathy) Brazeau of Palos Heights, Ill., passed away at age 59 on Sept. 15, 2016. Kathy worked for CETCO in Hoffman Estates, Ill., for more than 22 years as a production/logistics/customer service coordinator. A well-known fixture and highly regarded within the geosynthetics industry, she was affectionately known as the “Bentomat Queen.” …

Industry News

Geotechnical Frontiers 2017 early registration rates end Dec. 16

Register now for Geotechnical Frontiers 2017. Geotechnical Frontiers is co-organized with ASCE’s Geo-Institute, and is a merging of the annual G-I Geo-Congress and the biennial GMA Geosynthetics conference. Early bird registration rates apply until Dec. 16, 2016. This event will include 8 short courses, more than 350 paper presentations, 9 panel discussions, and 2 training …

Industry News

Registration open for containment & welding course

The Fabricated Geomembrane Institute (FGI), in conjunction with TRI/Environmental, is offering a Feb. 21 short course, “Current Advances and Trends in Containment & Welding Technologies.” Date: Tuesday, Feb. 21, 2017 Time: 8 a.m.–5 p.m. Location: TRI/Environmental 9063 Bee Caves Road Austin, Texas  78733 Earn: 8 professional development hours (PDHs) Instructors:  Timothy Stark (University of Illinois), Sam Allan (TRI/Environmental), Andrew …

Industry News

Drowning in lined liquid waste pond

According to a press release issued by the WorkSafe Division of the Western Australia Department of Commerce, a person engaged to assist with the day-to-day activities at a septic liquid waste pond facility drowned when he slipped into one of the ponds. On the day of the incident, the man was required to manually stop …

Industry News

Geosynthetics wins two awards

On Nov. 10, 2016, the Minnesota Magazine & Publishing Association held its annual Excellence Awards Gala. The event features magazines published in Minnesota and provides an opportunity to recognize editors and graphic designers. Of the 12 entries submitted by Industrial Fabrics Association International (IFAI) publications, nine won awards—two gold, one silver, and six bronze. Geosynthetics …

Case Studies

Case Study: Capping semi-liquid solids with geosynthetic layers

Introduction A U.S.-based polyethylene and polyester resin/polymer producer recently closed a manufacturing facility in Wilmington, N.C. (Photo 1). The company hired an engineering firm to manage the demolition and removal of the expansive structures and infrastructure. Part of the environmental responsibilities was to also find a viable solution for closing a 12-acre sludge basin. But …

Case Studies

Geosynthetics: The science that makes green roofs work

Green roofs 101­–From bottom to top Introduction Most green roofs use a variety of geosynthetic materials to support healthy and sustainable installations. Geosynthetics contribute in many ways to the operational success and long-term sustainability of green roof systems. Because they are lightweight, they reduce green roofs’ structural loading on buildings and also reduce the energy …

Case Studies

Environmental applications of geosynthetics in pipeline installations

Geo + Pipeline 101 Geosynthetics often play an important role on the environmental side of pipeline installations. During construction, actions must be taken to protect water quality, stabilize soil, and prevent soil erosion. Pipeline right-of-ways traverse many different types of landscapes, passing through sensitive resource areas such as streams and wetlands. Geosynthetics are used in …

Case Studies

‘Largest green roof in the world’ proposed for Silicon Valley project

Last year, Uruguayan architect Rafael Viñoly unveiled plans to convert an ageing shopping center in California’s Silicon Valley into a vast development featuring the world’s largest green roof. Viñoly, the architect behind London’s controversial Walkie Talkie building and the skinny 432 Park Avenue skyscraper in New York, will work with OLIN Landscape Architects to redevelop …

Case Studies

Pioneer Mountains Scenic Byway frost heave prevention and results

Abstract The Pioneer Mountains Scenic Byway, located about 30 miles (48km) west of Dillon, Mont., seasonally experiences frost heave problems over a 20-mile (30-km) stretch of road. The road is closed to winter traffic and typically re-opens in May. Longitudinal full-section depth cracks form during the spring thaw. One location, in the high alpine meadows …

Case Studies

Bridge building in Maine with GRS (geosynthetic-reinforced soil)

The challenge In 2013, the small town of North Haven on North Haven Island off the coast of Maine, began construction on a unique bridge project. The goal was to rebuild Beach Bridge, a deteriorating structure that provided access to a handful of seasonal homes and an important wharf for local lobstering as well as …

Case Studies

Renovating the Zhongsha Bridge

Award of Excellence Ace Geosynthetics Introduction The object of this renovation project is the Zhongsha Bridge located on the Zhuoshui River in west-central Taiwan. The 2,345m-long bridge spans the Zhuoshui on the border between Changhua and Yunlin counties. The bridge was built in 1978 with prestressed hollow core piles and prestressed beams. It is part …

Case Studies

Lach Huyen Bridge work platforms

Outstanding Achievement Award TenCate Geosynthetics Introduction More than 27km of geotextile tubes were installed to reclaim the 4.1km × 26m work platforms to construct the 600,000m³ dredged sediment containment facility for construction of Lach Huyen Bridge in Vietnam. The in-progress 5.44km (almost 3.5 miles) bridge, which accommodates a four-lane highway, spans across the combined estuary …

Case Studies

Using geosynthetic materials to effectively close a coal ash pond

Introduction Many electric utilities are required by the U.S. Environmetal Protection Agency’s (EPA) recently published Disposal of Coal Combustion Residuals from Electric Utilities Rule to evaluate and address closure options for historical coal ash storage areas. EPA Administrator Gina McCarthy signed the final rule Dec. 19, 2014, and it was published in the Federal Register …

Case Studies

GRS-IBS Makes Quick Work of Bridge Replacement

When flooding forced the closure of the Jessup Mill Road Bridge over Edward’s Run in Mantua Township, New Jersey, county officials turned to a quick but effective solution to reopen the vital community link: geosynthetic reinforced soil–integrated bridge system technology. “We had observed the use of innovative bridge construction methods in other states that reduce …

Industry News

Specification change: ASTM D6364 for drainage materials

The specification ASTM D1621 will change in the next issue of the Geosynthetics Specifier’s Guide (December 2016/January 2017). The change is from: Compressive Strength at yield per ASTM D1621 kPa (psi) To: Compressive Strength at yield per ASTM D6364 units kPa (psi) For a complete explanation, read this column from the Geosynthetic Institute.

Geomembranes

Burke announces partners for CSPE geomembranes

San Jose, Calif.-based Burke Industries announced in a Sept. 8 press release that it has established exclusive strategic partnerships with Colorado Lining International Inc. (CLI) and Layfield Environmental Systems Corp. (Layfield) for the distribution and fabrication of all Burke chlorosulfonated polyethylene (CSPE) geomembrane products and systems. The two companies will manage Burke’s CSPE geomembranes in …

Feature

New ballast system cited in landfill case studies

Introduction Exposed geomembrane cover systems such as rain covers and temporary caps are used on landfills throughout the world. While there are numerous benefits associated with exposed membranes, there are also potential hazards associated with insufficient ballasting or anchoring of the cover materials. For years owners and engineers have used various methods for ballasting exposed …

Geogrids

Underground gardens

Efficient landscape engineering and effective geosynthetic materials built Maple Garden Park In Taichung City, Taiwan, city dwellers wandering through Maple Garden Park are actually meandering below ground level. In November 2012, landscape engineers working with the aid of geosynthetic products converted a large hole in the heart of the city into an urban park oasis. …

Geogrids

ASTM announces new geogrid standard

A new geogrid test method from the standards organization, ASTM International, has been issued, according to a July 20 ASTM press release. The release said that the test described in the standard—D7864/D7864M, Test Method for Determining the Aperture Stability Modulus of Geogrids—will help ensure that geogrids meet product specific calibrated and validated levels of aperture …

Geomembranes

Intertape Polymer Group geomembranes are certified

Sarasota, Fla.-based Intertape Polymer Group (IPG) announced in a June 22 press release that its geomembranes have been certified by NSF International, a global public health and safety organization. The release said that NSF has certified IPG’s Aquamaster line of geomembranes to NSF/ANSI 61. ANSI 61 is a certification by NSF applied to products that …

Feature

An approach to approaching zero leakage

Panel Discussion: Geosynthetics 2015 Conference February 16, 2015 | Portland, Ore. Session moderator: Ian D. Peggs, I-Corp International Inc., USA Do liners leak? It is said that all liners leak, including geomembranes. They don’t. Double geomembrane liners do not leak into the subgrade. Or do they? What should probably be said is that all single …

Geomembranes

Geomembrane would surround buildings

Business asks to test flood-protection shield on former Tuckerton police station By Pat Johnson Since Federal Emergency Management Agency (FEMA) money won’t go far enough to pay for demolition of the former police office on South Green Street that was damaged beyond repair by 2012’s Superstorm Sandy, the Tuckerton [N.J.] Borough Council entertained a presentation …

Geotextiles

Geotextile + polyurea pre-sprayed panels

1-2 combo delivers waterproofing at Hawaii water impoundment structure By Del Williams Introduction For decades, polyurea coatings have been spray applied directly to properly prepared concrete, metal, and geotextile substrates on the jobsite using special equipment and trained applicators. However, recent polyurea products and process improvements are now speeding the installation process with even higher …

Feature

Part 2: The first double geomembrane liner 40 years later

Constructed in June 1974, it’s been in continuous service ever since then. By J.P. Giroud and J.P. Gourc Introduction The first double liner with two geomembranes was constructed in June 1974 and has been in continuous service since then. The double-lined structure is a water reservoir located in Pont-de-Claix, near Grenoble in southeastern France. The …

Industry News

Geo firms eyeing Vietnam market

Intrigued by Vietnam’s planned emphasis on infrastructure development, foreign geotechnical firms are seeking support roles in the many potential projects on Vietnam’s horizon. Geonia, a South Korea woven geotextiles manufacturing firm, is expecting a surge in demand for this product. “Vietnam’s government is boosting the construction of infrastructure nationwide, which is generating high demand for …

Industry News

Learn about TZD (Toward Zero Deaths) Dec. 8

Join the National Association of County Engineers (NACE) and the National Center for Rural Road Safety for a free 1.5-hour online webinar on the Toward Zero Deaths (TZD) national strategy. This webinar is directed toward local engineers, road managers, and local representatives with road and transportation responsibilities, and will provide information that can be used …

Industry News

Weisenberger is new sales manager at Seaman

In a press release issued last week, Wooster, Ohio-based Seaman Corp. announced that Dan Weisenberger has joined Seaman Industrial Products as sales manager for the southern region of the United States. The release noted that Weisenberger was previously a district sales manager for Saint-Gobain Coated Fabrics, and he brings more than two decades of polymer and …

Industry News

Next GSI webinar Dec. 14

December 1, 2016 GSI W-4 webinar: “Mechanically stabilized earth (MSE) wall, berm, and slope construction inspection” 11:30 a.m.–1 p.m. (ET) Wednesday, Dec. 14, 2016 GSI members: $200 USD Non-GSI members: $250 USD Webinar Overview                                                                                                             The inspection (aka, monitoring) of MSE wall, berm and slope construction using geosynthetic reinforcement is absolutely essential for providing a safe …

Industry News

Cantore, Zeller: Keynoters for EC-’17

Cantore, Zeller: Keynoters for EC-’17 “Is the Sky Falling?” is the title of the opening keynote by Jim Cantore at the 2017 edition of the International Erosion Control Association’s Environmental Connection-’17 conference in Atlanta, Wednesday, Feb. 22, 2017. Cantore, the well-known meteorologist with the Weather Channel, will discuss changes in weather patterns, predictions for the …

Industry News

In Memoriam

Kathy Brazeau ‘Bentomat Queen’ Kathleen (Kathy) Brazeau of Palos Heights, Ill., passed away at age 59 on Sept. 15, 2016. Kathy worked for CETCO in Hoffman Estates, Ill., for more than 22 years as a production/logistics/customer service coordinator. A well-known fixture and highly regarded within the geosynthetics industry, she was affectionately known as the “Bentomat Queen.” …

Industry News

Geotechnical Frontiers 2017 early registration rates end Dec. 16

Register now for Geotechnical Frontiers 2017. Geotechnical Frontiers is co-organized with ASCE’s Geo-Institute, and is a merging of the annual G-I Geo-Congress and the biennial GMA Geosynthetics conference. Early bird registration rates apply until Dec. 16, 2016. This event will include 8 short courses, more than 350 paper presentations, 9 panel discussions, and 2 training …

Industry News

Registration open for containment & welding course

The Fabricated Geomembrane Institute (FGI), in conjunction with TRI/Environmental, is offering a Feb. 21 short course, “Current Advances and Trends in Containment & Welding Technologies.” Date: Tuesday, Feb. 21, 2017 Time: 8 a.m.–5 p.m. Location: TRI/Environmental 9063 Bee Caves Road Austin, Texas  78733 Earn: 8 professional development hours (PDHs) Instructors:  Timothy Stark (University of Illinois), Sam Allan (TRI/Environmental), Andrew …

Industry News

Drowning in lined liquid waste pond

According to a press release issued by the WorkSafe Division of the Western Australia Department of Commerce, a person engaged to assist with the day-to-day activities at a septic liquid waste pond facility drowned when he slipped into one of the ponds. On the day of the incident, the man was required to manually stop …

Industry News

Geosynthetics wins two awards

On Nov. 10, 2016, the Minnesota Magazine & Publishing Association held its annual Excellence Awards Gala. The event features magazines published in Minnesota and provides an opportunity to recognize editors and graphic designers. Of the 12 entries submitted by Industrial Fabrics Association International (IFAI) publications, nine won awards—two gold, one silver, and six bronze. Geosynthetics …

GMA Techline

Questions and answers from the GMA Techline

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

Recycled materials reinforcement?

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

Weld or sew?

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

Strength test?

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

Three of the most difficult questions

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

Lining of soil embankment?

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

Geotextile question

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

Reinforcement deformations

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

MQA and GRI specs

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 …

GMA Techline

LLDPE Question

“Burnout” occurred when the double-seam fusion welder got stuck as it welded (a stop at a small crease or at times going up a slope) followed by the welder sitting in one spot for a short time causing a burn hole in the LLDPE. The welder continues from that point onward once the situation is …

Industry News

2016 State of the Specialty Fabrics Industry

The U.S./Canada geosynthetics market includes geotextiles, geomembranes, geogrids, geosynthetic clay liners, drainage materials, geocells, and erosion control materials. In 2015, the size of the U.S./Canada geosynthetics market was $2.3 billion, up 4.5% over 2014. It is expected to swell to $2.4 billion in 2016, up 5% compared with 2015. In a survey of Geosynthetic Materials …

Feature

Part 2: Field evaluation of the performance of unpaved roads incorporating geosynthetics—Planning

Introduction Scope and terminology The mechanisms that govern unpaved road performance are complex. Therefore, it is legitimate to try to get quantitative data from laboratory and field tests, but test interpretation can be correct only if there is a good understanding of the mechanisms (which was the purpose of the Part 1 article), rigorous planning …

Feature

Part 1: Mechanisms governing the performance of unpaved roads incorporating geosynthetics

Authors’ note: Road improvement is one of the major applications of geosynthetics. It is also one of the most complex because of the variety of mechanisms involved. This Part 1 article provides a description of the mechanisms that govern the performance of unpaved roads incorporating geosynthetics. It will be followed, in the next issue of …

News

New initiatives to promote geosynthetics education in civil engineering curricula

The North American Geosynthetics Society (NAGS) is currently helping to re-establish the “Educate the Educators” (EtE) program. With the support of the Geosynthetic Materials Association (GMA) and sponsors such as the Geosynthetic Institute (GSI), IGS–NA developed a two-day event where experts in the geosynthetics field introduced 40 college professors to various geosynthetic materials and their …

Case Studies

Part 1 Durability of geosynthetics: The basics

By John H. Greenwood Author’s note This article is based on a training presentation delivered on Sept. 24, 2014, at the 10th International Conference on Geosynthetics in Berlin, Germany. That talk was itself based on courses given at ERA Technology, Leatherhead, U.K., with Alan Friday, and later at SKZ in Würzburg, Germany, with the participation …

Resources

Geosynthetics and Katrina: 10 years after

August 29, 2005, was K-Day for New Orleans. Hurricane Katrina had been ginning up for days off the Bahamas and Gulf of Mexico. By the evening of the 28th, she had the Crescent City in her crosshairs. Early morning on the 29th, Hurricane Katrina struck the Gulf Coast of the United States. When the storm …

Specifications

Gaining a better understanding of the porometer test (ASTM D6767)

By Bruce Lacina and Melissa Medlin 1. Introduction The ASTM international standard test method for pore size characteristics of geotextiles by capillary flow test provides a wealth of information about the physical makeup of the structure and pore spaces in a geotextile sample. This test is often referred to as the pore size distribution (PSD) …

Technical

Report from the North American Geosynthetics Society (NAGS)

By Bob Mackey ASTM Committee D35 on Geosynthetics The ASTM Committee D35 on Geosynthetics met in New Orleans, La., Jan. 28–30, 2015. There was significant progress within several of the D35 subcommittees as noted here: Subcommittee D35.03 on Permeability and Filtration The issue that generated a great deal of discussion at the January meeting of …

Feature

Design considerations

By Richard Thiel, Edward Kavazanjian Jr., and Xuan Wu Introduction Figure 1 shows a conceptual cross section of a landfill sideslope, including final grades at the end of waste placement and the ultimate grades due to the settlement that occurs following the end of waste placement. Settlement at any point in the landfill will be …

Testing & Codes

Allowable stress on geonets based on laboratory creep tests

By Dhani Narejo and Sam Allen Introduction The first article in this three-part series presented compressive stress-strain behavior of several different geonet structures. The collapse, or rollover, does not occur for many types of geonets. In the absence of a rollover, the compression of geonets is non-linear in most cases with the compression rate being …