A new look for Geo-Congress 2023

June 1, 2023  |  Editorial

In Hollywood, Calif., a walkway of stars honors those who have achieved greatness in the areas of music, sports, film and television. And just a few blocks away, Geo-Congress 2023 remembered its stars with a similar geotechnical walk of fame on the second floor of the Los Angeles Convention Center. …
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Hybrid TMAX Calculating

June 1, 2023  |  Q&A: GMA Techline

Q: As of 2020, there are new, updated designs for mechanically stabilized earth walls in AASHTO. In short, there are new methods to calculate the maximum force (Tmax) that incorporates design methods for extensible reinforcements (i.e., geosynthetics). They include limit equilibrium and stiffness me…
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Geomembrane Residual Stress

June 1, 2023  |  Q&A: GMA Techline

Q: We are getting a lot of uncertainty with our ASTM D5397 single-point notched constant tension load (SP-NCTL) stress crack testing. Can you shed some light on the situation? This uncertainty is frustrating our field personnel and holding up a rather large HDPE geomembrane liner installation for a …
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The ASTM D1505 Method

June 1, 2023  |  Q&A: GMA Techline

Q: I want to measure the density of a mineral-filled composite polymer mixture by the ASTM D1505 method. What liquid will be used for density measurement (density >1)? The products to be tested are made of either polypropylene or polyethylene with calcium carbonate and additives. We will be addin…
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Geomembrane welding below freezing

June 1, 2023  |  Q&A: GMA Techline

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?
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Committee D35 on Geosynthetics meets in San Antonio, Texas

June 1, 2023  |  Update

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 distinguis…
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Powering through extremes: Fuel containment in Moose Creek

June 1, 2023  |  Features

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 is essential. Primary a…
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Hugo, Colo., wastewater treatment system improvements

June 1, 2023  |  Features

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 Denver, and 30 mil…
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Embankment reinforcement using 1750 kN/m strength geogrids

June 1, 2023  |  Features, News

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 that runs the length of Br…
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