Modeling very early age concrete under uniaxial short-time and sustained loading

Abstract

This paper presents a material model for evalua-tion of instantaneous and time-dependent strain of concrete subjected to uniaxial short-time and sustained loading at very early ages. All necessary formulas and values of ma-terial parameters are given. The emphasis in derivation of the model was put on easy calibration of the small number of material parameters with experimental data commonly provided by concrete producers. The range of applicability of the proposed model is from the initial setting time to final setting time from 3 to 8 hours.