Cellular concrete being flowed into pipeline trench
Available Resources

Cellular Concrete: Filling the Void

An article in TBM magazine provides a nice overview of cellular concrete technology. I never knew this (although it makes sense) but the material was used primarily as a lightweight floor leveling product for high-rise […]

Second Avenue Subway tunneling project
Project Related

New York MTA Project Updates

Tunnel Business Online had a neat article in the April 2012 issue discussing the progress on the various New York MTA tunneling projects. They suggest that this may someday be considered the ‘Golden Age of […]

Roadheader
Available Resources

Roadheaders in North America

Drill and Blast and Tunnel Boring Machine are two common types of tunnel construction methods. But roadheaders have been around for many years, getting their start in the coal mining industry. So where do they […]