World of coal ash

June 1, 2015

What in the Wide, Wide World of Sports issa goin’ on here? —Slim Pickens as Taggart in “Blazing Saddles” By Ron Bygness I could not help recalling that memorable line from the classic Mel Brooks movie while I was first investigating an industry conference on the subject of coal ash. Truly, what is going on …

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) …

Overlapping standardized test methods

GSI News By Bob & George Koerner It is generally recognized that generic test methods for all geosynthetic products are essential to manufacturing, design, permitting, specifying, and acceptance organizations to provide for a successful project at reasonable cost. Even further, it is desirable that such test methods are generated and accepted on a worldwide basis. …

2014 International Achievement Awards: Fort Pierce City Marina

EDITOR’S NOTE Complete information regarding the parties and all Maccaferri solutions and products involved in the award-winning reconstruction of the Fort Pierce City Marina were not included in the original article. –R.B. In rebuilding the Fort Pierce City Marina, the storm protection breakwater system was anchored by a 10.5-acre peninsular island, known as Tern Island, …

Stormwater detention pond

Geomembrane testing? Root penetration? Welding HDPE with LLDPE? Woven geopipe? Questions and answers from the GMA Techline We are designing a campus that has a pond for stormwater detention, as well as an architectural/aesthetic pond that is about an acre in area, 6 feet deep, sideslopes 4H:1V, and is right up against a building. The …

Woven Geopipe?

Geomembrane testing? Root penetration? Welding HDPE with LLDPE? Woven geopipe? Questions and answers from the GMA Techline We hope you can give us contacts for some fabricators who could supply geosynthetic pipe or equal. We want to make woven pipe for water—sizes from 3 to 30 feet and pressures 10 to 100 feet of head. …

Geosynthetics & Landfills 101

Erosion control challenges at solid waste facilities By Eric S. Steinhauser Introduction Landfills, particularly municipal solid waste (MSW) landfills, are often misunderstood. Commonly referred to as “dumps,” these highly engineered facilities, and the engineering project teams involved in their development, do not get the respect they deserve. Once the primary option for MSW disposal, the …

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 …

Welding on the slope

Geomembrane testing? Root penetration? Welding HDPE with LLDPE? Woven geopipe? Questions and answers from the GMA Techline I have a colleague who is insisting that we build a pond’s embankment extension by welding new geomembrane to an old one on the “slight” slope (really somewhere 1:4 ratio). I am arguing that we should do welding …

Suction component to resist uplift?

Geomembrane testing? Root penetration? Welding HDPE with LLDPE? Woven geopipe? Questions and answers from the GMA Techline What about a reservoir geomembrane liner over a secondary hot-mix asphalt (HMA) liner with adequate anchorage below the crest (fill embankment) and at the bottom (minimum water depth)? The secondary HMA liner is intended to be “impermeable” and …