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The Pozzolanic Reaction of Silica Fume

Published online by Cambridge University Press:  22 November 2012

Ole M. Jensen
Ole M. Jensen*
Affiliation:
Technical University of Denmark, Brovej, Bygning 118, 2800 Kgs. Lyngby Denmark.
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Abstract

Silica fume is a very important supplementary cementitious binder in High-Performance and Ultra High-Performance Concretes. Through its pozzolanic reaction the silica fume densifies the concrete micro-structure, in particular it strengthens the paste-aggregate interfacial transition zone. In the present paper different aspects of the pozzolanic reaction of silica fume are investigated. These include chemical shrinkage, isothermal heat development and strength development. Key data for these are given and compared with theoretical calculations, and based on presented measurements the energy of activation of the pozzolanic reaction of silica fume is estimated. The results show that the pozzolanic reaction of silica fume has notable differences from Portland cement hydration.

Keywords

compositeblendSi
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1488: Symposium 7B – Concrete with Smart Additives and Supplementary Cementitious Materials , 2012 , imrc12-1488-7b-021
Copyright
Copyright © Materials Research Society 2012 

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References

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