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

Key Engineering Materials 2014
Nikolajs Toropovs, Diāna Bajāre, Genādijs Šahmenko, Linda Krāģe, Aleksandrs Korjakins

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 in 28 days old samples and were not found in 6 month old sample. The compressive strength results indicate that concrete still continues to harden after the 28-days of curing.

Keywords
Microsilica, nanosilica, high strength concrete, microstructure, mechanical properties
DOI
10.4028/www.scientific.net/KEM.604.83

Toropovs, N., Bajāre, D., Šahmenko, G., Krāģe, L., Korjakins, A. The Formation of Microstructure in High Strength Concrete Containing Micro and Nanosilica. Key Engineering Materials, 2014, Vol.604, pp.83-86. ISSN 1662-9795. Available from: doi:10.4028/www.scientific.net/KEM.604.83

Publication language
English (en)