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ACI Spring 2010 Convention
March 21 - 25, 2010
Marriott Rivercenter Hotel & Henry B. Gonzalez Convention Center -- San Antonio, TX

NRMCA Sustainable Conference
April 12 - 15, 2010
Tempe, AZ

International Parking Institute Conference & Expo
May 10 - 12, 2010
Mandolay Bay - Las Vegas, NV

International Bridge
Conference 2010

June 6 - 9, 2010
David L. Lawrence Convention Center - Pittsburgh, PA

ACI Fall 2010 Convention
October 24 - 28, 2010
The Westin Convention Center -- Pittsburgh, PA

 
Chapter 2 - Using Silica Fume in Concrete
Producing High-Performance Concrete Bridges

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Slide
There must be an economic or design justification for an owner to consider the use of the high-strength concrete for bridge girders.

Similarly, there must be an economic justification for an owner to select HPC for a bridge deck. Usually, this justification is a longer service life. High strength will usually not be a design advantage in a bridge deck. Justification for use in bridge decks must be based upon improvements in durability brought about by reduced chloride intrusion.

There are growing concerns over thermally-induced cracking resulting from the very high cement contents used to produce high-strength bridge girders. Combinations of portland cement, fly ash, and silica fume may allow achieving the strength required while reducing the heat generated during hydration.

There is also a concern about the higher modulus of elasticity and lower creep of high-strength concrete in decks. Are these decks more prone to shrinkage cracking than low-strength concrete?