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]
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ASTM Updates
Standards and Codes
ASTM Updates February 2010
ASTM C39/C39M – "Standard test method for compressive strength of cylindrical concrete specimens" is probably the most significant standard update for the moth of February, at least as it pertains to the geotechnical and construction industries. Also included are a number of other concrete and mortar related standards, and some changes to the E series on nondestructive testing. Click through for the list of ASTM Standards that were revised, reapproved or otherwise changed this month.