This post contains a list of new, revised and otherwise updated ASTM standards that pertain to the geotechnical engineering, materials testing and related fields. Standard C39/C39M for testing the compressive strength of concrete cyllinders was updated, as was C42/42m for obtaining and testing drilled cores and sawed beams of concrete. The month of March also saw several geosynthetic standards being updated or added, including new standards for selecting the test method for geomembrane seams, and for testing the flexural rigidity of geogrids and other geosynthetics. There are also a few updated standards related to asphalt mix design and sampling of asphalt. Click through for updated ASTM Standards relating to geoprofessionals.
Dr. Robert M. Koerner has recently published the 6th edition of his industry standard text, Designing With Geosynthetics. He changed to a small publishing company to bring down the price, and the result is a […]
Tensar Corporation will be making a significant investment in their Morrow, Georgia production facility where they manufacture geogrids such as their Triax line. The improvements will come online in 2012 and increase production capacity by […]
This paper presents how geotextiles were used to repair three dams in Texas, Arizona, and Colorado. The geotextile performs different functions in each of these three dams, all of which are dry structures. By Benjamin […]
It’s that time again. Here are a collection of changes/additions to ASTM standards that are relevant to geotechnical engineers, soils labs, CQA firms and related disciplines. There are a couple of interesting new standards available. D7698 is a new procedure for estimation of in-place density and water content of soil and aggregate by correlation with complex impedance. I’m not eactly sure what that is, but it sounds cool. There is also a new standard (D7702) that provides guidance for the evaluation of direct shear results involving geosynthetics. Read on for these and other updates.
Graduate student Saman Zarnani and Dr. Richard Bathurst of the Royal Military College have developed a new application for geofoam and geosynthetics, to mitigate earthquake damage by improving the foundation subgrade. Initial shake table testing […]
Geosynthetica has some interesting photos of so called ‘whales’ in geomembranes. These giant bubbles are caused by a variety of things, but are essentially gas trapped underneath the geomembrane that can have significant buoyant force, […]
Two new standards from the Geosynthetics committee of ASTM will help define properties that can be used in the design of geosynthetic reinforced pavement. I know in my practice in Arizona, ADOT simply allows a […]
Tony Allen of Washington State DOT may be one of the most influential people in the country in the field of geosynthetics standards, testing and specifications. His involvement in the field of geosynthetics over the […]
In an open letter to geotechnical engineers and agencies that specify geosynthetics on their projects, the Geosynthetics Manufacturers Association (GMA) has requested that specifiers use the correct standards when referring material properties of geotextiles and […]