Micromechanics-based multifield framework for early-age concrete

► Multiscale model for early-age concrete is implemented into a multifield framework. ► The homogenized elastic properties of early-age concrete are obtained by upscaling. ► Fully-coupled analysis is conducted with the homogenized properties of concrete. ► Homogenized Biot's coefficient links the energy and mass field to the mechanical field. ► Removal of formwork of early-age concrete are studied with this method.