Micro and/or Nano-Silica modified moderate and high strength concrete: Rheology and synergistic effects on strength, elastic & inelastic behavior and microstructure


Nuri Turkmenoglu H. N. , Boyaci B., Baran Ş. , Nihat Bicakci S., Nuri Atahan H.

Construction and Building Materials, vol.333, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 333
  • Publication Date: 2022
  • Doi Number: 10.1016/j.conbuildmat.2022.127404
  • Title of Journal : Construction and Building Materials
  • Keywords: Micro-silica, Nano-silica, Synergistic effect, Compressive strength, Splitting tensile strength, Discontinuity and critical stress limit, Microstructure, ITZ, Rheology, HIGH-PERFORMANCE CONCRETE, MECHANICAL-PROPERTIES, FLY-ASH, COMPRESSIVE STRENGTH, CEMENTING EFFICIENCIES, NANO-SIO2, DURABILITY, NANOSIO(2), NANOSILICA, WORKABILITY

Abstract

© 2022 Elsevier LtdSynergistic effects of micro-silica (MS) and nano-silica (NS) on moderate and high strength concrete properties were investigated. Efficacy of micro and nano refinement remarkably increased as the W/Cm ratio decreased, and up to 37% improvement in compressive strength was obtained. Moreover, the linear-elastic region of the stress vs. strain diagrams significantly extended. As a result of the synergistic effect, a very dense interfacial transition zone was formed. The time-dependent evolution of the elastic modulus was much more effective than the compressive strength development. However, the combined use of MS and NS significantly decreased ductility.