The Formation of Microstructure in High Strength Concrete Containing Micro and Nanosilica

Nikolajs Toropovs; Diana Bajare; Genadijs Sahmenko; Linda Krage; Aleksandrs Korjakins

doi:10.4028/www.scientific.net/KEM.604.83

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The Formation of Microstructure in High Strength Concrete Containing Micro and Nanosilica
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The Formation of Microstructure in High Strength Concrete Containing Micro and Nanosilica

Abstract:

This article presents the results of microstructural investigation of high strength concrete containing microsilica and nanosilica (amorphous SiO₂) as an active pozzolanic admixture. Micro and nanosilica react with calcium hydroxide producing calcium silicate hydrates (C-S-H), thus the voids and pores within concrete are filled and new minerals are formed in the gaps between cement grains and aggregate particles. Unreacted round microsilica and nanosilica particles were registered using SEM even in 6 month old samples. The compressive strength results indicate that concrete still continues to harden after the 28-days of curing.

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Periodical:

Key Engineering Materials (Volume 604)

Pages:

83-86

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.604.83

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Online since:

March 2014

Authors:

Nikolajs Toropovs, Diana Bajare, Genadijs Sahmenko*, Linda Krage, Aleksandrs Korjakins

Keywords:

High-Strength Concrete (HSC), Mechanical Property, Microsilica, Microstructure, Nanosilica

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