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Geomembrane welding below freezing
June 1st, 2023
Q: Can geomembrane welding be done below freezing (32 degrees Fahrenheit [0 degree Celsius])? If it can be done, is there a method or preferred procedure to assure its success? A: If the soil beneath the geomembrane is frozen, the heat from the welders may thaw moisture from the subgrade and allow water to condense […]
Committee D35 on Geosynthetics meets in San Antonio, Texas
June 1st, 2023
ASTM International’s Committee D35 on Geosynthetics held its first biannual committee meetings of 2023 on January 25-27 in San Antonio, Texas. The meetings started with a special workshop to help define what role our committee should play regarding sustainability. Big thanks to our five distinguished speakers—Dr. Mark Wayne (Tensar International), Chris Quirk (NAUE Geosynthetics Ltd.), […]
Powering through extremes: Fuel containment in Moose Creek
June 1st, 2023
FIGURE 1 Earthen trench. Photo courtesy of Latitude 63 Alaska, the Arctic, and similar cold weather regions are expected to play a key role in supplying future energy needs for the world. As energy resources continue to be pursued in these extreme climates to meet the energy demands of society, protection of our natural resources […]
Hugo, Colo., wastewater treatment system improvements
June 1st, 2023
FIGURE 1 Sand ballast placement operation Around 1859 the town of Hugo, Colo., was developed as a cattle ranching community to supply miners with provisions and to serve as a local stagecoach stop. It was officially founded in 1870 and incorporated in 1909; this frontier community of 786 people is located off I-70 east of […]
Embankment reinforcement using 1750 kN/m strength geogrids
June 1st, 2023
Figure 1 Installation of the high-strength, high-modulus geogrid. In 2015, a variant road was built to relieve urban traffic in the southeastern section of federal road BR 101, more precisely in Florianopolis, which is the capital city of Santa Catarina, Brazil. With a length of 4,828 km (3,000 miles), BR-101 is a major Brazilian highway […]
Erosion control and infrastructure
June 1st, 2023
Figure 1 Aspen excelsior erosion control blanket installed to protect a steep roadside channel. Photo courtesy of American Excelsior Company. Infrastructure projects require a variety of solutions provided by Erosion Control Technology Council (ECTC) members. ECTC is a leading industry organization whose members are dedicated to advancing the knowledge, experience and expertise of erosion and […]
Updated accelerated aging test for geomembranes
June 1st, 2023
FIGURE 1 Star fold coupon The accelerated aging process is based on the relationship between temperature and chemical reaction rate, in which the reaction rate increases as temperature rises. Most accelerated aging tests use higher temperatures to accelerate the aging process by representing real-time aging artificially. A good accelerated aging test should simulate real-time aging […]
IGS North America update: All about Toronto
June 1st, 2023
IGS North America (IGS-NA) is deep into planning GeoAmericas 2024, the 5th Pan-American Conference on Geosynthetics: geoamericas2024.org. Abstracts were accepted through May 24, and the technical and education committees will send the initial presentation/paper invitations in June. Exhibit and sponsorship opportunities will open to the field by June 2023. GeoAmericas 2024 will be held April […]
GEOWEB Slope Protection System provides transmission line stabilization solution
June 1st, 2023
The GEOWEB® Soil Stabilization System (geocells) provides vegetated slope protection solution for three Appalachian Mountain transmission towers. Transmission lines are integral to supplying power to homes and businesses throughout the country. Confronted with variable terrains, geohazards, and other site complications, transmission line construction projects must contend with a wide range of complexities, including the extreme […]