Free Webinar–Geotechnical Aspects of Polyurethane Grout

December 8, 2015 rockman Rockman's Ramblings Comments Off on Free Webinar–Geotechnical Aspects of Polyurethane Grout
URETEK Deep Injection™ Process

URETEK Deep Injection™ ProcessI’m pleased to announce that I will be a guest speaker at the monthly webinar of URETEK Holdings, an affiliate of GeoPrac sponsor URETEK ICR.  I will be presenting on Geotechnical Aspects of Polyurethane Grout, representing Golder Associates Inc., my day-job employer.  The webinar is free and open to anyone interested until the spots fill up.

The presentation will be on Friday, December 11, 2015 from 11am – 12pm EST.  Please be sure to register for this webinar before it fills up. I hope that what I discuss will be useful to owners and engineers who are considering using or specifying URETEK products on their project.  Thanks!

Image Credit – URETEK ICR

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ASTM No. 57 Stone
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The Curious Case of No. 57 Stone

May 12, 2014 Katherine Witt Articles, Forensics and Failures Comments Off on The Curious Case of No. 57 Stone

ASTM No. 57 StoneThe American Society for Testing and Materials, or ASTM, No. 57 stone is often used as sub base fill material below road surfaces and buildings. It is a fragmented stone with angular edges and is regularly utilized as a drainage layer when used with geotextile fabric. Although the material is touted by many as "self-compacting," excess voids left from zero compactive effort in locations with little confinement may not eliminate the possibility of future settlement. What happens when the environment above the No. 57 stone causes it to settle?

[Editor] Read on for the answer to this interesting question in the case of settlement of a structure at the University of North Carolina at Chapel Hill. The contributed article by Katherine Witt describes how URETEK Mid-Atlantic used their high-density polyurethane resin to stabilize the No. 57 stone beneath a settled foundation as well as lift the surrounding slab back into place. [/Editor]

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