Wasser‐ und Salzhaushalt im Gefüge zementgebundener Baustoffe – Modellierung der auftretenden Mechanismen

Water and Salt in the Pore Structure of Cementitious Building Materials – Modelling the mechanisms Moisture and salt penetration can lead to significant damage in reinforced concrete structures. Thus a realistic calculation of moisture and salt distributions in cementitious building materials is essential to estimate the service life of reinforced concrete structures. The main mechanisms and interactions affecting moisture and salt transport in cementitious building materials were observed and described mathematically with the aim of developing a numerical model. As well as the effect of salt on known moisture transport phenomena, the cause of the self‐sealing effect of concrete against penetrating water was investigated using nuclear magnetic resonance tomography (NMR) and gamma ray absorption. Based on the results, a model was developed which describes the capillary transport of moisture and salt in concrete taking the self‐sealing effect into account.