Investigation the Influence of adding Nano –Yttria Partially Stabilized Zirconia (NZrO2-5wt%YPSZ) on the Physical and Mechanical Properties of Concrete

Abstract

Building materials have shown remarkable progress, as many methods have been used to enhance their properties, such as nanomaterials which have played a major role in this field. This research reveals the complex integration of nano-zirconia (NZrO2-5wt%YPSZ) with concrete and its effect on different mechanical properties. The main objective of this research is to reduce the porosity of concrete by adding doses of nano-zirconia to the concrete mixture to enhance the microstructure, thereby improving its mechanical properties. Results showed that the addition of nano-zirconia decreased concrete slump and increased the rates of absorption and porosity because of the agglomeration of nanoparticles. The compressive strength increased to 30, 47.5 and 60 MPa at the ages of 7, 28 and 90 days, respectively. The splitting tensile strength increased when the zirconia content was increased, reaching its highest level when substituting 0.7wt% compared with the reference mixture. In summary, this study sheds light on the effect of nano-zirconia on the mechanical properties of concrete by filling the pores, which enhances its microstructure because it reshapes the complex texture of the concrete mixture.