Elastic stiffness estimation of aggregate–ITZ system of concrete through matrix porosity and volumetric considerations: explanation and exemplification

Abstract The modulus of elasticity a concrete depends on the elastic stiffness both cementitious matrix and aggregate–ITZ system, which includes any slippage mechanisms under loading between aggregate within interfacial transition zone (ITZ). A procedure is presented in this paper to estimate an system matrix, by considering relative volumes porosities components. method was validated determining limestone–ITZ electric arc furnace slag (EAFS)–ITZ systems when embedded slag-based matrix. greater EAFS–ITZ comparison with natural explained higher strength following additions EAFS. Moreover, having determined those parameters, moduli concretes similar could then be accurately estimated.