HSC is a state-of-the-art material that can be manufactured by most concrete plants due to the
availability of a variety of additives such as silica fume and water reducing admixtures. The definition of
HSC has evolved with its gradual development and usage over the years. At present, ACI 363R-92 (1)
defines HSC as concretes, made using conventional materials, admixtures, and techniques, having specified
compressive strengths for design of at least 40 MPa (6000 psi). This definition is adopted in this paper to
distinguish between HSC and NSC data.