Durability characteristics of high and ultra-high performance concretes

Durability characteristics of high-performance concrete (HPC) and ultra-high performance (UHPC) are evaluated in comparison to normal strength (NSC). HPC UHPC cast using commonly available materials with no special heat treatment. Concrete resistivity, rapid chloride permeability, sorptivity, porosity, resistance migration carbonation these three types assessed. Microstructure hydration products investigated scanning electron microscope (SEM) imaging X-ray diffraction (XRD) analyses, respectively. Potential enhancement the service life reinforced (RC) structures when is replaced predicted time-to-corrosion model. Dense microstructures, high electrical resistance, negligible low ingress observed UHPC. The diffusion coefficient was found be at least orders magnitude lower compared NSC, which could delay corrosion initiation steel reinforcement. With such positive attributes, concretes expected find more widespread application harsh-climatic conditions. This paper provides additional data analysis that accelerate adoption practice. • 160 MPa achieved common without applying has NSC. issue eliminated