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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

 

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Slide
On this project silica fume was added primarily to enhance constructability. The exterior concrete walls in this structure are 4.5 ft (1.4 m) thick. To prevent thermally induced cracking, the designer specified very tight control over the maximum temperature rise allowed in the concrete. To meet the requirements for concrete temperature, the contractor elected to use a Class F fly ash in the concrete. While the fly ash did help to reduce temperature development, the early strength gain characteristics of the concrete were such that form removal was delayed. Addition of silica fume to the concrete provided additional early strength to facilitate form removal on a satisfactory schedule. For additional information, see: Holland, T. C., "High-Performance Concrete: As High as It Gets!", The Concrete Producer, V. 16, No. 7, July, 1998, pp. 501-505.