On the behaviour of concrete at early-ages: A multiphase description of hygro-thermo-chemo-mechanical properties

摘要: Abstract Understanding the early-age behaviour of concrete is importance for designing durable structures. To contribute to improvement this, a hygro-thermo-chemo-mechanical model presented that accounts phenomena such as hydration, external and internal drying, self-heating, creep, shrinkage fracture. The based on multiphase porous media framework, using Thermodynamically Constrained Averaging Theory (TCAT) starting point derive governing equations system. This allows systematic treatment multiscale properties how these develop during e.g. chemical physical fixation water. proposed mathematical implemented within context Finite Element Method (FEM), where all fields are solved in fully-coupled manner. Chosen demonstrated validated three experimental results from literature. Generally, simulated good agreement with measurements.