The Incredible Hoover Dam Bypass Bridge Under Construction

Posted by Queuebot in Architecture, Pictures, Science & Tech on June 25, 2009 at 12:58 am

Little known outside of its home states of Nevada and Arizona, this new bridge has been overshadowed by its more venerable and certainly larger neighbor but the Hoover Dam Bypass Bridge is certainly something to be seen.

Were it not so near the Hoover Dam it would probably be a tourist spot all on its own. Due to be completed next year this amazing bridge is still very much under construction, as pictures in the link will show. Once the arch meets in the middle the biggest party since Prohibition will no doubt ensue.

The longer, more proper and formal name is the Mike O’Callaghan-Pat Tillman Memorial Bridge. Perhaps it is already known as The Mike and Pat locally. O’Callaghan was the Governor of Nevada in the nineteen seventies as well as a veteran of the Korean War. Tillman is by far the more controversial choice. He gave up a millionaire lifestyle and superstar footballer status to serve in the US Army in Afghanistan where he was killed in 2004. His death has been subject to military investigations and more than the occasional conspiracy theory.

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From the Upcoming ueue, submitted by taliesyn30.

 
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Negative CO2 Emitting Cement

Posted by Jill Harness in Everything Else, Science & Tech on January 1, 2009 at 4:50 pm

People love to overlook certain things that pollute, just because we don’t have an alternative yet. We never talk about the emissions caused from cement, which produces more carbon dioxide than the entire aviation industry. Did you know that 5% of all CO2 production comes from cement?

There is finally an alternative. The British engineering firm, Novacem, has created a new cement that uses magnesium silicates, which emit no carbon dioxide when they are heated. As the cement hardens, it absorbs CO2. In all, it removes about .6 tons of carbon dioxide per ton of cement used.

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