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]
Standards and Codes
ASTM Updates for April 2011
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.
Standards and Codes
ASTM Standards November Update
November was a big month for updates to ASTM Standards…84 updates to be more specific. Several that caught my attention were D4546 One-Dimensional Swell or Settlement Potential, D7383 – Standard Test Methods for Axial Compressive Force Pulse (Rapid) Testing of Deep Foundations (a new standard), several standards that might affect shotcrete design and a large number of water testing standards. Read on for the list.
Miscellaneous
Geosynthetics Magazine – Focus on History of Geosynthetics
The October-November 2009 issue of Geosynthetics Magazine has a special section titled “Focus on History” with some special content on the history of geosynthetics. (Photo of late 1970’s geocell testing for the US Army Corps, […]