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Optimization of ZnO2 nanoparticle content in binary blended concrete to enhance high strength concrete

  • Ali Nazari and Shadi Riahi
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 102 Issue 4

Abstract

The mechanical properties of concrete containing ZnO2 nanoparticles which was cured in saturated limewater have been optimized. ZnO2 nanoparticles were added to concrete as nano-fillers. The specimens were cured in water and saturated limewater for 7, 28 and 90 days after casting and then their strength was evaluated by mechanical testing (compressive, split tensile and flexural strength tests). The results showed that replacement of Portland cement with ZnO2 nanoparticles up to 1.0 wt.% for the specimens cured in water and 2.0 wt.% for the specimens cured in saturated limewater produces concrete with the best strength. It has been shown that curing the specimens in saturated limewater for 28 days and then in water until 90 days, produces a stronger concrete than those cured only in saturated limewater for 90 days. Excess Ca(OH)2 crystals which form after 28 days, when the specimens are cured in limewater, do not contribute to strength enhancement as much as strengthening gel and hence, the mechanical properties of the specimens do not reach the highest level. On the other hand, curing the specimens in water after 28 days produces more strengthening gel and results in a concrete with higher strength. The addition of nanoparticles improves the pore structure of concretes, thus, the refined extent of the pore structure increases with decreasing nanoparticle content. The pore structure of concrete cured in saturated limewater is better than that of concrete cured in water.

Keywords: ZnO2 nanoparticles; Strength; Optimized properties; Pore structure; Concrete
* Correspondence address, Ali Nazari, Assistant professor, Department of Technical and Engineering Sciences, Islamic Azad University (Saveh Branch), Saveh, Iran. Tel.: +98 255 224 1511, Fax: +98 255 224 1501, E-mail:

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Received: 2010-7-19
Accepted: 2011-2-7
Published Online: 2013-06-11
Published in Print: 2011-04-01

© 2011, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110497
Keywords for this article
ZnO2 nanoparticles; Strength; Optimized properties; Pore structure; Concrete

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. On the evolution of microstructure in oxygen-free high conductivity copper during thermo-mechanical processing using rotary swaging
  5. Phase-field simulation of diffusion couples in the Ni–Al system
  6. Finnis–Sinclair potentials for fcc Au–Pd and Ag–Pt alloys
  7. Hollow pyramidal lattice truss structures
  8. Synthesis of single-phase polycrystalline Ca2Si powder and sintered compacts
  9. On the micromechanics of die compaction of composite powder materials
  10. Structural, thermal, electrical and mechanical properties of nanosilica-composite polymer electrolytes
  11. The effects of tool rotation speed and traverse speed on friction stir welding of AISI 304 austenitic stainless steel
  12. Estimation of Fe2B growth on low-carbon steel based on two diffusion models
  13. Glass-forming ability and thermal stability of gas-atomized Zr50Cu40Al10 metallic glass powders
  14. Mechanochemical synthesis of nanocrystalline lead selenide: industrial approach
  15. On abnormal grain growth in nanocrystalline materials induced by small particles
  16. High-temperature deformation behaviour of Ti3Al-11Nb intermetallic
  17. Optimization of ZnO2 nanoparticle content in binary blended concrete to enhance high strength concrete
  18. New structural and mechanical features of hexagonal materials after room temperature extrusion using the KoBo method
  19. People
  20. Yuri Estrin turns 65
  21. DGM News
  22. DGM News
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