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 boost of Resilient Modulus (R-Value) of 10 when biaxial geogrids are used. Perhaps in time this will lead to a design method to account for the geosynthetic reinforcement in a more analytical way. [Source: Geosynthetics Magazine]
D5434 – “Standard Guide for Field Logging of Subsurface Explorations of Soil and Rock” and D4429 – “Standard Test Method for CBR (California Bearing Ratio) of Soils in Place” are two standards revised this month that may be of interest to geotechnical engineers. Those in the construction services and materials testing business should take a look at a number of changes to relevant standards. This month there are also a few revised standards related to detection of different ions in water. I also see that there are a number of geothermal and solar standards that were reapproved this month, most of them seem to have been last modified in the late 1980’s and early 1990’s. Click through for the full list of new, revised and reapproved ASTM standards from June.
Our monthly update on new and revised ASTM standards that relate to geotechnical engineering, materials testing, hydrogeology, geosynthetics and related disciplines. This month there are a few notable revisions, including D1452 for Auger Borings, D3385 for Double-Ring Infiltrometer and D4595 for determining tensile properties of geotextiles by the wide-width strip method. There are also a few other geotextile, groundwater, lime, masonry and terminology standards that were added or updated. Click through for the full list.