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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
Enhancing Mechanical Properties

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This slide shows the effects of adding increasing amounts of silica fume to a low water-cementitious ratio, air-entrained concrete. Note that:

1. Increased strength will be seen at all ages.

2. There is a diminishing return that governs the addition of silica fume. Strength

will not continue to increase at the same rate with increased additions.

This concrete mixture is typical of what has been used in many parking structures and bridge decks, where the amount of silica fume added would be approximately 7.5 percent. This mixture would not be optimal for high-strength applications. See the following slides for high-strength concrete performance.