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]
22nd April 2013, Redditch, UK – Keynetix are pleased to announce that an upgrade to KeyLAB has been released today that includes a number of new features requested by users to help them manage their geotechnical and concrete laboratory. The new build expands the functionality of the system to assist laboratory managers who are conducting concrete testing, working in a NATA accredited laboratory or with the ASTM standards and is available free of charge to all users who have an in-date maintenance agreement.
As well as the new features in this release, KeyLAB have produced a large number of free test definitions and input and report sheets for companies who are implementing KeyLAB within a laboratory, conducting tests to BS or ASTM standards. These worksheets and reports have been designed by Peter Keeton from Keynetix, who has over 30 years experience of managing large geotechnical laboratories.
[Editor] Click through for the rest of the press release from Keynetix. [/Editor]
This post contains a summary of geotechnical, materials testing, geosynthetic and related testing standards that were updated by ASTM during the month of September. This month there were not as many updates as the last couple, but a few that caught my eye are a new standard for measuring geosynthetic-soil resilient interface shear stiffness, a revision to the standard practice for laboratories testing concrete and concrete aggregates for use in construction and criteria for laboratory evaluation and a revision to the standard for measuring slump flow of self-consolidating concrete.