Editorial

Drama behind the scenes

June 1, 2020

I’m writing this from my living room, my office for now during mandatory telecommuting for all Industrial Fabrics Association International staff due to the COVID-19 pandemic. It’s been an experiment, thus far successful, in putting together a magazine without face-to-face meetings and with no hard copies of proofs to review. Despite the behind-the-scenes logistical drama, …

Conference

Geosynthetics Conference 2021

June 1, 2020

Make your plans now to participate in Geosynthetics Conference 2021—Colocated with IECA’s Annual Conference Who? Who is on the Organizing Committee for this event? Organizing Committee Chair Jie Han, Ph.D., The University of Kansas Technical Program Co-chairs  Melissa Beauregard, Ph.D., P.E., United States Air Force Academy Jennifer E. Nicks, Ph.D., P.E., Federal Highway Administration Application …

Feature

Enhanced moisture management of pavement systems through capillary suction

June 1, 2020

By René B. Laprade and John M. Lostumbo Moisture within pavement layers is a principal cause of pavement deterioration (Cedergren 1994, Christopher and McGuffey 1997, Henry and Holtz 2001). Specific problems associated with moisture include (1) reduction in pavement strength caused by excess water in the base course layers and/or the subgrade soils, (2) shrinking …

Feature

Assessment of condition of an uncovered geosynthetic landfill bottom liner system

June 1, 2020

By James L. Hanson and Nazlı Yeşiller Composite liner systems consisting of geomembranes (GMs) placed over geosynthetic clay liners (GCLs) commonly are used for containment applications. Such systems are used in base liners for ponds, reservoirs, basins and canals, and bottom and cover liner systems for landfill facilities. Even though the use of GCL-GM composites …

IGS-NA (NAGS)

IGS-NA holds workshop at Geosynthetics Conference 2020

June 1, 2020

The North American Chapter of the International Geosynthetics Society (IGS-NA) held a technical and social session at the Geosynthetics Conference 2020: CASE STUDIES in North Charleston, S.C. The chapter would like to express our sincere gratitude to our volunteers that made this session happen: Boyd Ramsey of Boyd Ramsey Consulting, Professor Michael Pluimer of the …

GMA Techline

The GMA Techline

June 1, 2020

Moderated by George R. Koerner Minimum sediment thickness Q: We are going to construct some evaporation ponds on existing sediment on top of a Hypalon geomembrane. The sediment looks to be predominantly fine. The subgrade condition below the liner is not known for sure. In such conditions, can you recommend a minimum sediment thickness that …

GMA News

GMA history, Part 2

June 1, 2020

During the Geosynthetics CASE STUDIES Conference in March in North Charleston, S.C., a few of the past Geosynthetic Materials Association (GMA) leaders had an opportunity to address the gathering and recall their personal experiences and achievements when they chaired the GMA executive council. This is the second installment of the history of GMA.  Beginning in …

GSI News

Test method for determining leakage through imperfections in GMs of a composite liner system

June 1, 2020

This article describes a large-scale test method intended to determine the leakage through imperfections in a geomembrane (GM) under a given head. It can be used as a performance test to simulate field conditions where the GM is physically breached. The test method places a GM test specimen of 2 feet (0.6 m) in diameter …

Case Study

High-strength geocell and geogrid hybrid reinforcement

June 1, 2020

Compressor station gravel pad on soft subgrade By Sanat Pokharel, Timothy Yii, Marc Breault and Meisam Norouzi Infrastructure development in natural resources rich Alberta, Canada, often encounters very soft ground conditions that pose several construction and sustainability challenges to transportation infrastructure, such as roads, rails and pipelines. As the conventional construction practices may not always …

Events

GSI to host webinar on sustainability with geosynthetics

May 29, 2020

The Geosynthetic Institute (GSI) will sponsor a webinar, “Sustainability with Geosynthetics,” on June 10, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. There is a tremendous amount of infrastructure throughout the world. As it ages, it …

Company News

IFAI president responds to Coronavirus, adjusts upcoming events

March 17, 2020

As concern over the Coronavirus (COVID-19) grows, I want all IFAI members to know we are closely monitoring developments and following recommendations from the Centers for Disease Control (CDC) and the World Health Organization (WHO). We will follow their recommendations to keep our employees, their families and our members healthy and safe. With this in …

Expo News

Award breakfast transforms into a networking event

October 4, 2019

Keynote speaker Thom Singer hosted IFAI’s annual award ceremony October 3 at Expo 2019, continuing his message to “see people.” As Expo exhibitors and attendees entered the breakfast event, Singer encouraged people to separate from familiar colleagues and sit with new people. This year’s award ceremony was infused with an additional goal—that of networking with …

Awards

2019 International Achievement Award winners announced

October 3, 2019

The Industrial Fabrics Association International (IFAI) has awarded this year’s International Achievement Awards (IAA) for design excellence in specialty fabrics applications, announced at the awards breakfast on Thursday, Oct. 3 at IFAI Expo 2019. IFAI Expo is the largest specialty fabrics trade show in North America, held this year at the Orange County Convention Center …

Awards

IFF Innovation Award winners announced at IFAI Expo 2019

October 3, 2019

The Industrial Fabrics Foundation (IFF) has awarded Propex GeoSolutions, Chattanooga, Tenn., first prize in the 2019 IFF Innovation Award competition. The company’s PETROMAT® Enviro engineered paving fabric won in the category of End Products. Propex GeoSolutions was awarded a prize of $5,000, presented at IFAI Expo in Orlando, Fla. PETROMAT Enviro was developed to solve the milling …

Expo News

Puerto Rico pups steal hearts at IFAI Expo 2019

October 3, 2019

Amid the latest fabrics, equipment, technology and services for the specialty fabrics industry, Lorenzo, Lilo, Lolo, and Lulo stole hearts, and, according to some dog lovers—the show—at IFAI Expo 2019 in Orlando, Fla. For this Expo, the Industrial Fabrics Foundation (IFF) and the Pet Alliance of Greater Orlando came together to promote two great causes. …

Expo News

Follow the right steps to successfully bid on military contracts

October 2, 2019

The U.S. government is the largest buyer of goods and services in the world, and there are enough opportunities available for everyone to participate in military contract bidding, if you follow the right steps, according to Jennifer Fennell, CPM, director of procurement for Polo Custom Products, Topeka, Kan.  Fennell and Jeff Papalia, textiles program manager …

Expo News

USACE shares infrastructure suggestions

October 17, 2018

Jeb Tingle, senior research engineer at the U.S. Army Corps of Engineers (USACE) Engineer Research and Development Center (ERDC) in Vicksburg, Miss., delivered the plenary address at GeoDallas on Oct. 17 on “Advancing the Nation’s Infrastructure: The USACE Role.” “There’s a big role for research and innovation,” Tingle said. “Doing business as usual won’t give …

Expo News

2018 International Achievement Award Winners Announced

October 17, 2018

The Industrial Fabrics Association International (IFAI) has awarded this year’s International Achievement Awards (IAA) for design excellence in specialty fabrics applications, announced at the awards breakfast on Wednesday, Oct. 17 at IFAI Expo 2018. IFAI Expo is the largest specialty fabrics trade show in North America, held this year at the Kay Bailey Hutchison Convention …

Expo News

Sharpen your competitive edge

October 17, 2018

Asking yourself one simple question can help make your business a magnet for new customers, says marketing professional Madeleine MacRae, owner of MM MacRae Coaching & Consulting. “That question is ‘Who is your ideal client?’” In her Oct. 16 Expo session on distinguishing yourself in the marketplace, MacRae says answering this question is the key …

Expo News

Digital presence is key to acquiring new customers in 2019

October 16, 2018

It’s no surprise the digital world means a company’s ability to attract and keep customers requires a dramatic shift in strategy, tools and resources. Ed Keough, vice president of sales for FutureGuard Building Products Inc. in Auburn, Maine, told business owners they need to embrace digital advertising or be “left in the dust” during his …

Feature

Enhanced moisture management of pavement systems through capillary suction

June 1, 2020

By René B. Laprade and John M. Lostumbo Moisture within pavement layers is a principal cause of pavement deterioration (Cedergren 1994, Christopher and McGuffey 1997, Henry and Holtz 2001). Specific problems associated with moisture include (1) reduction in pavement strength caused by excess water in the base course layers and/or the subgrade soils, (2) shrinking …

Feature

Assessment of condition of an uncovered geosynthetic landfill bottom liner system

June 1, 2020

By James L. Hanson and Nazlı Yeşiller Composite liner systems consisting of geomembranes (GMs) placed over geosynthetic clay liners (GCLs) commonly are used for containment applications. Such systems are used in base liners for ponds, reservoirs, basins and canals, and bottom and cover liner systems for landfill facilities. Even though the use of GCL-GM composites …

GMA Techline

The GMA Techline

June 1, 2020

Moderated by George R. Koerner Minimum sediment thickness Q: We are going to construct some evaporation ponds on existing sediment on top of a Hypalon geomembrane. The sediment looks to be predominantly fine. The subgrade condition below the liner is not known for sure. In such conditions, can you recommend a minimum sediment thickness that …

Case Study

High-strength geocell and geogrid hybrid reinforcement

June 1, 2020

Compressor station gravel pad on soft subgrade By Sanat Pokharel, Timothy Yii, Marc Breault and Meisam Norouzi Infrastructure development in natural resources rich Alberta, Canada, often encounters very soft ground conditions that pose several construction and sustainability challenges to transportation infrastructure, such as roads, rails and pipelines. As the conventional construction practices may not always …

Case Study Members only content

Geosynthetic strip MSE wall at Point Defiance Marina

April 1, 2020

By Paul C. Frankenberger and Robert Lozano  This article will focus on a geosynthetic strip mechanically stabilized earth (MSE) wall case study using discrete geosynthetic strips with large precast facing panels (Figure 1), an innovation of the original MSE invention. The system is the Highway Innovative Technology Evaluation Center/National Transportation Product Evaluation Program reviewed GeoMega …

GMA Techline

The GMA Techline

April 1, 2020

Moderated by George R. Koerner and Y. “Grace” Hsuan Welding Rod Q: This question is in regard to the welding rod intended for welding of geomembranes (both high-density polyethylene [HDPE] and linear low-density polyethylene [LLDPE]). Are there any GRI GM13- or GM17-based requirements for welding rods or are there any white papers or specifications? I …

Feature Members only content

Construction water flow dynamics of the leak detection layer

April 1, 2020

By Abigail Gilson-Beck and Larry Shilling The double-lined containment facility featuring a leak detection system (LDS) is the most accurate way of assessing leakage through a primary geomembrane (Bonaparte and Gross 1992). This type of system also represents the gold standard for environmental protection, since leakage through the primary liner is collected and removed so …

Feature Members only content

CSPE performance and history in long-term potable water storage applications

April 1, 2020

By Brian Fraser, Steven Roades, Mike Neal and Alex Gersch Chlorosulfonated polyethylene (CSPE) is a synthetic rubber-based material manufactured by a calendaring process into multiple layers and combines with a polyester reinforcement fabric for additional strength. Hypalon is a DuPont trademark for CSPE synthetic rubber (CSM) noted for its resistance to chemicals, temperature extremes and …

Awards

International Achievement Awards

April 1, 2020

Recognizing design excellence in geosynthetics The International Achievement Awards, sponsored by the Industrial Fabrics Association International (IFAI), recognize innovation, technical skill and design excellence in geosynthetic applications.  The awards are an annual competition promoting awareness of the specialty fabrics used in thousands of products and applications ranging in size and shape. For more than 70 …

GMA Techline

The GMA Techline

February 1, 2020

Moderated by George R. Koerner and Y. “Grace” Hsuan DARCIAN PERMEABILITY Q: I am aware of the section in your book regarding geomembrane “permeability” and get from it that it aims to calculate an equivalent Darcian permeability using vapor diffusion via Fick’s law. Can one use the derived permeability then when calculating flow using Darcy’s …

GMA Techline

The GMA Techline

June 1, 2020

Moderated by George R. Koerner Minimum sediment thickness Q: We are going to construct some evaporation ponds on existing sediment on top of a Hypalon geomembrane. The sediment looks to be predominantly fine. The subgrade condition below the liner is not known for sure. In such conditions, can you recommend a minimum sediment thickness that …

GMA Techline

The GMA Techline

April 1, 2020

Moderated by George R. Koerner and Y. “Grace” Hsuan Welding Rod Q: This question is in regard to the welding rod intended for welding of geomembranes (both high-density polyethylene [HDPE] and linear low-density polyethylene [LLDPE]). Are there any GRI GM13- or GM17-based requirements for welding rods or are there any white papers or specifications? I …

GMA Techline

The GMA Techline

February 1, 2020

Moderated by George R. Koerner and Y. “Grace” Hsuan DARCIAN PERMEABILITY Q: I am aware of the section in your book regarding geomembrane “permeability” and get from it that it aims to calculate an equivalent Darcian permeability using vapor diffusion via Fick’s law. Can one use the derived permeability then when calculating flow using Darcy’s …

GMA Techline

The GMA Techline

August 1, 2019

Moderated by Robert M. Koerner, George R. Koerner and Y. “Grace” Hsuan A geotextile for unpaved driveway/road? Q: Is there any point in using a 150 g/m2 (4.4 oz/yd2) nonwoven geotextile in building an unpaved gravel driveway or gravel road? If so, what should be the most important characteristics of the fabric and what are …

GMA Techline

The GMA Techline

June 1, 2019

Who is doing the testing? Q: This question relates to the number of rolls to be selected as the lot sample for specification conformance testing and refers to ASTM D4354. When I look at this standard, it appears the values in Table 1 of GRI’s White Paper #10 refer to the number of units to …

GMA Techline

The GMA Techline

April 1, 2019

Vegetation causing gases under geomembrane? Q: I have a site where we are installing a high-density polyethylene (HDPE) liner in an existing pond. Because of some residual heavy metals in the top layer of soil, I would like to strip off the top 3–6 inches (7.6–15.2 cm) of soil and vegetation. Alternatively, we could mow and …

GMA Techline

The GMA Techline

February 1, 2019

Geomembranes for canal lining Q: Our company is an international member of the Industrial Fabrics Association International (IFAI). Our government is planning to line their water canals with a geomembrane to prevent water seepage into the soil. We have been approached by many to suggest the most suitable material with specifications to guide them in …

GMA Techline

The GMA Techline

October 1, 2018

Toxicity of nonwovens? Q: Are there any comprehensive tests (or a general synopsis) of the environmental toxicity of leachate from nonwoven polypropylene fabrics when aged in a freshwater or saltwater solution? Regulatory and municipal bodies in Europe and New Zealand are requesting more info about products that are used in riparian and coastal environments. A: …

GMA Techline

The GMA Techline answers all

August 1, 2018

UV Weathering of Geotextiles Q: My firm is providing construction quality assurance services for a landfill cell expansion. We are having an issue with our contractor and are going to be in a position of having 8 ounces/square yard (271 g/m2) of nonwoven geotextile exposed for a period of time, which exceeds the seven-day limit …

Feature

GMA Techline

February 1, 2018

Determining quantity of recycled HDPE in a geonet Q: I have a question about high-density polyethylene (HDPE) geonets. Is it possible, by thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC) analysis, to determine the quantity of recycled HDPE present in a geonet? I have a geonet that, I think, is made with virgin and recycled …

IGS-NA (NAGS)

IGS-NA holds workshop at Geosynthetics Conference 2020

June 1, 2020

The North American Chapter of the International Geosynthetics Society (IGS-NA) held a technical and social session at the Geosynthetics Conference 2020: CASE STUDIES in North Charleston, S.C. The chapter would like to express our sincere gratitude to our volunteers that made this session happen: Boyd Ramsey of Boyd Ramsey Consulting, Professor Michael Pluimer of the …

GMA News

GMA history, Part 2

June 1, 2020

During the Geosynthetics CASE STUDIES Conference in March in North Charleston, S.C., a few of the past Geosynthetic Materials Association (GMA) leaders had an opportunity to address the gathering and recall their personal experiences and achievements when they chaired the GMA executive council. This is the second installment of the history of GMA.  Beginning in …

GSI News

Test method for determining leakage through imperfections in GMs of a composite liner system

June 1, 2020

This article describes a large-scale test method intended to determine the leakage through imperfections in a geomembrane (GM) under a given head. It can be used as a performance test to simulate field conditions where the GM is physically breached. The test method places a GM test specimen of 2 feet (0.6 m) in diameter …

Events

GSI to host webinar on sustainability with geosynthetics

May 29, 2020

The Geosynthetic Institute (GSI) will sponsor a webinar, “Sustainability with Geosynthetics,” on June 10, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. There is a tremendous amount of infrastructure throughout the world. As it ages, it …

COVID-19

EuroGeo7 moves to May 2021 due to COVID-19

May 27, 2020

Due to the global development and concerns over COVID-19, the EuroGeo7 Conference, which was originally scheduled to take place from Sept. 6–9, 2020, in Warsaw, Poland, is now postponed until May 16–19, 2021. The decision to postpone EuroGeo7 was made in the interest of the health and safety of everyone participating in the conference. The organizers …

Events

Deadline extended for Geosynthetics Conference 2021 abstracts

May 26, 2020

The deadline to submit abstracts for Geosynthetics Conference 2021 has been extended to June 15, 2020. Now is the time to submit abstract submissions for technical papers of all types—see the current topic and session list below.  The 2021 Geosynthetics Conference will be colocated with the International Erosion Control Association’s (IECA) Annual Conference. Authors, instructors and session chairs …

Events

GSI to host webinar on lifetime durability of geosynthetics

May 20, 2020

The Geosynthetic Institute (GSI) will sponsor a webinar, “Lifetime Durability of Geosynthetics,” on May 27, from 11:30 a.m. to 1 p.m. EDT. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. The need to know the approximate lifetime of geosynthetics is paramount in deciding …

Company News

Freudenberg Group acquires Low and Bonar

May 19, 2020

The global technology group Freudenberg acquired 100 percent of the shares in Low and Bonar PLC, London, United Kingdom. Low and Bonar is a global manufacturer of technical textiles. The company will be integrated into the Freudenberg Performance Materials Business Group. “Freudenberg strengthens its performance materials business, and with Low and Bonar’s innovative technology it …

Events

Book your Geosynthetics Conference 2021 booth today

May 19, 2020

The show floor is filling up fast! Act now and reserve your booth space for Geosynthetics Conference 2021 taking place Feb. 21–24, 2021, in Kansas City, Mo., USA. Geosynthetics Conference 2021 will be colocated with IECA’s Annual Conference and Expo. The last time IFAI and IECA colocated more than 3,000 participants were brought in. Don’t miss out on the …

GSI News

GSI issues request-for-proposals for graduate student fellowships

May 18, 2020

The Geosynthetic Institute (GSI) announces a worldwide request-for-proposals (RFP) focusing on innovative geosynthetics research and development projects. There will be several awards given, each for $5,000. Emphasis will be placed on relevant topics of interest and/or concern to the geosynthetics community. The proposals must be submitted in the following four-page format: Page 1 – Letter …

Events

Webinar: Geosynthetics for coal combustion residual (CCR) applications

June 11, 2019

The Fabricated Geomembrane Institute (FGI) will sponsor a free webinar, “Geosynthetics for Coal Combustion Residual (CCR) Applications,” on June 25, from 12 p.m. to 1 p.m. CDT. This webinar will discuss the application of geosynthetic products for use in coal combustion residual (CCR) landfills and impoundments. The webinar will provide an overview of the available …

Industry News

Applications being accepted for DFI’s Women in Deep Foundations professional development grants

April 1, 2019

The DFI Educational Trust and the DFI Women in Deep Foundations Committee are awarding five grants of $1,750 each to women involved in design and/or construction of deep foundations to attend DFI’s 44th Annual Conference on Deep Foundations in Chicago, Oct. 15–18, 2019. The grant includes free conference registration and covers related expenses for attending …

Geogrids

Modeling demonstrates benefit of geogrid-reinforced aggregate base

December 21, 2018

Improved modeling of geogrid for use with the Minnesota Department of Transportation’s pavement design software, MnPAVE Flexible, will allow pavement designers to simulate field tests of stiffness and resiliency in pavements over bases with and without geogrid. The department, known as MnDOT, is using modeling results from a recent study to develop a design input that quantifies the …

Events

GSI to host short course on QA/QC in waste containment, GMA members get discounted rates

December 20, 2018

The Geosynthetic Institute (GSI) will sponsor a short course “Quality Assurance/Quality Control of Geosynthetics in Waste Containment Facilities,” Jan. 14–16, 2019, from 11 a.m. to 12:30 p.m. and 2 p.m. to 3:30 pm EST. Geosynthetic Materials Association (GMA) member companies and their employees receive discounted rates on all GSI webinar and short course registrations. This …

Industry News

FGI offers webinar on shear testing

December 17, 2018

The Fabricated Geomembrane Institute (FGI) will sponsor a free webinar “Geosynthetic Interface Shear Testing,” on Jan. 22, 2019, from noon to 1 p.m. CDT. In this presentation, Robert Swan of Drexel University will discuss the different methods of measuring geosynthetic interface shear strength, describe industry standard test methods and explore the accreditation process for laboratories …

Events

Christopher to present Koerner lecture series on ‘lessons learned’

December 14, 2018

Barry R. Christopher, Ph.D., P.E., will present the first in the 2019 Dr. Robert M. Koerner Award and Lecture Series on “Lessons Learned: An Adventure in 4 Decades of Geosynthetics Engineering” on Feb. 13, 2019, at the Geosynthetics Conference 2019 in Houston, Texas. The presentation will review his involvement in the development of geosynthetics engineering …

Company News

EPT introduces new string-reinforced LLDPE geomembrane

December 13, 2018

To meet the growing demand for linear low density polyethylene (LLDPE) by geomembrane fabricators and installers, Engineered Polymer Technologies (EPT) has announced a new string-reinforced LLDPE fabric. LLDPE has been in increasing demand due to its superior flexibility and better layflat versus high density polyethylene (HDPE). EPT has specially formulated its LLDPE fabric for high …

Industry News

FGI accepting applications for engineering innovation award

November 30, 2018

The Fabricated Geomembrane Engineering Innovation Award was created to recognize engineers who have creatively used fabricated geomembranes to successfully fulfill a client/owner’s needs, including technical requirements, scheduling and budget. Today’s engineers are working to solve environmental issues on a global scale. The Fabricated Geomembrane Institute’s (FGI’s) Fabricated Geomembrane Engineering Innovation Award competition pays tribute to …

GSI News

GSI to host webinar on stability designs for landfill covers, GMA members get discounted rates

November 29, 2018

The Geosynthetic Institute (GSI) will sponsor a webinar “Stability Designs of Landfill Cover Soils,” on December 12, from 11:30 a.m. to 1 p.m. EDT. GMA member companies and their employees receive discounted rates on all GSI webinar and short course registrations. This webinar focuses on the stability design of relatively thin soil layers over geosynthetics …

Industry News

Tensar to present technical seminar in Minneapolis

November 26, 2018

Tensar International Corp. will sponsor a technical seminar in Minneapolis, Minn., on Jan. 8, 2019, from 7:30 a.m. to 4 p.m. CDT. The seminar will be held at the Hyatt Regency Minneapolis. The seminar will cover a variety of geosynthetic applications, including roadways, pavement maintenance, walls and slopes, market solutions, airfields, mechanically stabilized earth (MSE) …