Homogenization of nonaging basic creep of cementitious materials: A multiscale modeling benchmark

This paper presents the results of a European benchmark on multiscale creep modeling for cementitious materials, performed in framework COST Action TU1404 “Towards next generation standards service life cement-based materials and structures”. Three micromechanical models from three research groups have been adopted basic non-aging materials. The is based hypotheses that only calcium-silicate-hydrates (C-S-H) viscoelastic behavior all microstructural constituents maturity- composition-independent. By comparing model among themselves as well by predictions with experimental obtained different laboratories, we demonstrate upscaling micrometer-sized C-S-H to centimeter-sized macroscopic samples cement paste, mortar, concrete, minutes-long tests at early ages days-long very mature indeed possible. also highlights importance considering micro-anisotropy terms non-spherical shapes hydrates.