method for determining a plasticity parameter of a hydrated cement paste

摘要

The present invention relates to a method for determining a plasticity parameter of a hydrated cement paste comprising: providing components of a cement paste, mixing the components to obtain a cement paste and pouring said cement paste into an oedometric cell sealed, perform an oedometric measurement operation within a predefined early age interval after mixing said cement paste by applying a predefined axial stress path to the cement paste within the oedometric cell for a predefined measurement duration and measuring a axial deformation of the cement paste within said preset measuring duration. A plasticity parameter of the hydrated cement paste is determined by a calibration operation comprising providing an initial value of a plasticity parameter of an elastoplastic hydrated cement paste model, determining simulated axial strain values by solving the hydrated cement elastoplastic model and comparing the simulated axial strain values with the cement paste axial strain measurements to determine a plasticity parameter of the hydrated cement paste.