Long-Term Deformations of High-Strength Concrete Containing Silica Fume and Metakaolin

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Title: Long-Term Deformations of High-Strength Concrete Containing Silica Fume and Metakaolin

Author(s): J. J. Brooks and M. A. Megat Johari

Publication: Special Publication

Volume: 200

Issue:

Appears on pages(s): 97-112

Keywords: autogenous shrinkage; creep; drying shrinkage; high-strength concrete; metakaolin; silica fume

Date: 6/1/2001

Abstract:
The effects of metakaolin and silica fume on the creep and shrinkage of concrete were investigated. Compared with the control concrete, the concrete containing the mineral admixtures had lower early age autogenous shrinkage measured from the time of initial set, but the long-term autogenous shrinkage measured from the age of 24 hours was increased. The total shrinkage (autogenous plus drying shrinkage) measured from 24 hours was reduced. Drying shrinkage was less than for the control concrete. The basic creep of sealed concrete and total creep of drying concrete were significantly reduced due to metakaolin and silica fume particularly at higher replacement levels.