Industry News

NHI offers rockfall stabilization course online

September 19, 2017

The National Highway Institute (NHI) will offer a web-based course on rockfall stabilization. The beginning-level course, developed by the Transportation Curriculum Coordination Council (TCCC) in partnership with the American Association of State Highway and Transportation Officials (AASHTO) and NHI, will introduce the key concepts in rockfall stabilization, including tools and methods used in stabilization and …

Industry News

Trump nominates former IDOT director to lead FHWA

September 18, 2017

President Donald J. Trump nominated Paul Trombino II, former director of the Iowa Department of Transportation (IDOT), to lead the Federal Highway Administration (FHWA). Trombino, 51, led IDOT from 2011 to 2016, resigning in November 2016 to take a position as president of McClure Engineering of Clive, Iowa. The nomination requires approval by the U.S. …

Industry News

IECA 2018 registration open

September 13, 2017

The International Erosion Control Association (IECA) Annual Conference and Expo in Long Beach, Calif., Feb. 11–14, 2018, has opened online registration for the event at the Long Beach Convention Center. Visit http://bit.ly/2vUfvyc to register, view the schedule and learn more about speakers. The conference’s hotel block, as announced last week, is also open. To see …

Industry News

Nevada receives $21.6 million in additional federal highway funds

September 13, 2017

On Sept. 11, 2017, Nevada Department of Transportation (NDOT) director Rudy Malfabon told NDOT board the state had received $21,635,649 in additional federal highway funding for the fiscal year ending June 30, 2017. In process known as August Redistribution, the federal government reclaims unused funds from states and awards the money to states that used …

Industry News

FGI short course in civil engineering upcoming

September 11, 2017

The Fabricated Geomembrane Institute (FGI) will offer the short course “Geosynthetics in Civil Engineering Applications” on Oct. 27, 2017, from 8:00 a.m. to 4:30 p.m. EDT at The Ohio State University in Columbus. The short course, presented in partnership with The Ohio State University, Owens Corning Science and Technology, Ohio Environmental Protection Agency, Ohio Department …

Industry News

DFI releases technical program for DFI Annual Conference

September 7, 2017

On September 7, 2017, the Deep Foundations Institute (DFI) published the Technical Program for the 42nd Annual Conference on Deep Foundations, October 24–27, 2017, in New Orleans, La. A highlight at this year’s conference is an “Invited Panel on Risk: A Rational Discussion” on Wednesday, October 25, 2017, from 10:30 a.m. to 12:00 p.m. The …

Industry News

FHWA offers pavement preservation focus in September

September 7, 2017

The Federal Highway Administration (FHWA) Every Day Counts (EDC) innovation of the month for September is pavement preservation (when, where, and how), a whole-life approach to extending the service life of pavement networks. Applying a pavement preservation treatment at the right time (when) on the right project (where) with quality materials and construction (how) is …

Industry News

USDOT announces $500 Million funding through TIGER program

September 7, 2017

On September 6, 2017, the U.S. Department of Transportation (USDOT) announced the opportunity for state and local stakeholders to apply for $500 million in discretionary grant funding through the Transportation Investment Generating Economic Recovery (TIGER) program. “The TIGER grant program is a highly competitive program whose winners will be awarded with the funding they need …

Industry News

Afitex-Texel releases design guidance for protection from soil gas infiltration

September 6, 2017

Originally published in French by Groupe Alphard Inc. and translated and updated by Afitex-Texel, the resource “Design Guidance Document for the Protection of Buildings Against Soil Gas Infiltrations” is now available. The document discusses DRAINTUBE™ technology, a product that combines geosynthetic and pipe technology. Engineers have used DRAINTUBETM on hundreds of projects around the world. …

Industry News

ECTC releases RECPs spec

September 6, 2017

The Erosion Control Technology Council (ECTC) recently updated their Rolled Erosion Control Products (RECPs) specification. The specification includes charts of product characteristics for mulch control nettings (MCNs), open weave textiles (OWTs), erosion control blankets (ECBs) and turf reinforcement mats (TRMs). These charts are the result of consensus amongst leading manufacturers of RECPs in the industry …

Feature

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

August 1, 2017

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

Feature Members only content

GMA Techline

August 1, 2017

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

Feature

CCR management using geotextile tubes

August 1, 2017

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

Feature

Using geosynthetics for macroencapsulation for CCR on-site clean closure

August 1, 2017

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

Containment Members only content

Achieving zero leaks on a budget with geomembranes

June 1, 2017

For more than 30 years, the geomembrane industry has been told that “all geomembranes leak” (Giroud 1984), as if this were some foregone conclusion no matter what might happen from geomembrane manufacturing to the time it is put into service. But recently, the idea of “zero leaks” has been a hot topic at industry conferences, …

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

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 …

Industry News

NHI offers rockfall stabilization course online

September 19, 2017

The National Highway Institute (NHI) will offer a web-based course on rockfall stabilization. The beginning-level course, developed by the Transportation Curriculum Coordination Council (TCCC) in partnership with the American Association of State Highway and Transportation Officials (AASHTO) and NHI, will introduce the key concepts in rockfall stabilization, including tools and methods used in stabilization and …

Industry News

Trump nominates former IDOT director to lead FHWA

September 18, 2017

President Donald J. Trump nominated Paul Trombino II, former director of the Iowa Department of Transportation (IDOT), to lead the Federal Highway Administration (FHWA). Trombino, 51, led IDOT from 2011 to 2016, resigning in November 2016 to take a position as president of McClure Engineering of Clive, Iowa. The nomination requires approval by the U.S. …

Industry News

IECA 2018 registration open

September 13, 2017

The International Erosion Control Association (IECA) Annual Conference and Expo in Long Beach, Calif., Feb. 11–14, 2018, has opened online registration for the event at the Long Beach Convention Center. Visit http://bit.ly/2vUfvyc to register, view the schedule and learn more about speakers. The conference’s hotel block, as announced last week, is also open. To see …

Industry News

Nevada receives $21.6 million in additional federal highway funds

September 13, 2017

On Sept. 11, 2017, Nevada Department of Transportation (NDOT) director Rudy Malfabon told NDOT board the state had received $21,635,649 in additional federal highway funding for the fiscal year ending June 30, 2017. In process known as August Redistribution, the federal government reclaims unused funds from states and awards the money to states that used …

Industry News

FGI short course in civil engineering upcoming

September 11, 2017

The Fabricated Geomembrane Institute (FGI) will offer the short course “Geosynthetics in Civil Engineering Applications” on Oct. 27, 2017, from 8:00 a.m. to 4:30 p.m. EDT at The Ohio State University in Columbus. The short course, presented in partnership with The Ohio State University, Owens Corning Science and Technology, Ohio Environmental Protection Agency, Ohio Department …

Industry News

DFI releases technical program for DFI Annual Conference

September 7, 2017

On September 7, 2017, the Deep Foundations Institute (DFI) published the Technical Program for the 42nd Annual Conference on Deep Foundations, October 24–27, 2017, in New Orleans, La. A highlight at this year’s conference is an “Invited Panel on Risk: A Rational Discussion” on Wednesday, October 25, 2017, from 10:30 a.m. to 12:00 p.m. The …

Industry News

FHWA offers pavement preservation focus in September

September 7, 2017

The Federal Highway Administration (FHWA) Every Day Counts (EDC) innovation of the month for September is pavement preservation (when, where, and how), a whole-life approach to extending the service life of pavement networks. Applying a pavement preservation treatment at the right time (when) on the right project (where) with quality materials and construction (how) is …

Industry News

USDOT announces $500 Million funding through TIGER program

September 7, 2017

On September 6, 2017, the U.S. Department of Transportation (USDOT) announced the opportunity for state and local stakeholders to apply for $500 million in discretionary grant funding through the Transportation Investment Generating Economic Recovery (TIGER) program. “The TIGER grant program is a highly competitive program whose winners will be awarded with the funding they need …

Industry News

Afitex-Texel releases design guidance for protection from soil gas infiltration

September 6, 2017

Originally published in French by Groupe Alphard Inc. and translated and updated by Afitex-Texel, the resource “Design Guidance Document for the Protection of Buildings Against Soil Gas Infiltrations” is now available. The document discusses DRAINTUBE™ technology, a product that combines geosynthetic and pipe technology. Engineers have used DRAINTUBETM on hundreds of projects around the world. …

Industry News

ECTC releases RECPs spec

September 6, 2017

The Erosion Control Technology Council (ECTC) recently updated their Rolled Erosion Control Products (RECPs) specification. The specification includes charts of product characteristics for mulch control nettings (MCNs), open weave textiles (OWTs), erosion control blankets (ECBs) and turf reinforcement mats (TRMs). These charts are the result of consensus amongst leading manufacturers of RECPs in the industry …

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 …