The Durability of Concrete with the Participation …
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concrete containing hydrophilic nanosilica showed the better strength. Whereas after
a longer time (28 days of testing) with the smaller amount of nanoadditive (0.5%
by mass), the improvement of concrete application parameters was observed in the
presence of hydrophilic nanosilica.
Whereas the increase of nanoadditive amount to 1.5% by mass contributed to
better improvement of concrete physical properties in the presence of hydrophobic
nanosilica than in the presence of hydrophilic nanosilica. In that case particularly beneficial properties were demonstrated by”nano-concrete”, which apart from
nanosilica also contained the silica fume and the superplasticizer, which to the
most extent had the impact on the improvement of concrete properties, including its
reduced absorptivity, higher compressive strength or higher freeze-thaw resistance
compared to other concretes tested.
It was found that the presence of hydrophilic and hydrophobic nanosilica could
have a significant impact on a change of concrete mixture and hardened concrete
properties leading to increasing of its durability depending on the type and quantity
of nanoadditive used.
Test results obtained indicate a need of thorough testing of hydrophilic and
hydrophobic nanosilica impact on properties of the concrete mix and hardened
concrete aiming at reduction of w/c ratio and to investigate the impact of higher
content of nanosilica on the structure and tightness of concrete.
References
1. Czarnecki L, Kurdowski W (2006) Tendencies shaping the future of concrete. In: Conference
materials „Dni Betonu”, Wisła. pp 47–64
2. Raczkiewicz W (2012) Concrete—a construction material known for centuries. Przegl˛ ad
Budowlany 83:13–18
3. A¨ ıtcin P-C (2000) Cements of yesterday and today: concrete of tomorrow. Cem Concr Res
30:1349–1359
4. Czarnecki L (2011) Nanotechnology in construction. Przegl˛ ad Budowlany 82:40–53
5. Radomski W (1995) Global development trends of concrete technology. Przegl˛ ad Budowlany
8–9:23–29
6. Kurdowski W (2010) Cement and concrete chemistry. Wydawnictwo Polski Cement,
Wydawnictwo Naukowe PWN, Warszawa, p 2010
7. Czarnecki L, Justnes H (2012) Sutainable and durable concrete. Cement Wapno Beton 17:341–
362
8. Sobolev K, Gutiérrez MF (2005) How nanotechnology can change the concrete world. Am
Ceram Soc Bull 84:14
9. Flores-Velez LM, Dominguez O (2002) Characterization and properties of Portland cement
composites incorporating zinc-iron oxide nanoparticles. J Mater Sci 37:983–988
10. Błaszczy´ nski TZ (2012) Nanotechnologies in construction. In: Seminar “Nanotechnologies in
construction”, international fair Budma, Pozna´ n, pp 1–41
11. Nazari A, Riahi S, Shamekhi SF, Khademno A (2010) The effects of incorporation Fe 2 O 3
nanoparticles on tensile and flexural strength of concrete. J Am Sci 6(4):90–93
12. Yang J, Mohseni E, Behforouz B, Khotbehsara MM (2015) An experimental investigation into
the effects of Cr 2 O 3 and ZnO 2 nanoparticles on the mechanical properties and durability of
self-compacting mortar. Int J Mater Res 106:886–892
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