Minneapolis bridge illustrates advances in concrete technology

03/31/2009 | NYTimes.com

The new St. Anthony Falls Bridge in Minneapolis is made of several types of concrete mixes customized for specific durability and strength requirements. The mixes are also designed to reduce the impact on the environment. Observers say the bridge was among the most demanding concrete jobs in the U.S. and is a prime example of major changes in the way concrete is developed and used.

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