Analysis of cementitious materials by X-Ray diffraction methods - Time and spatial resolved

摘要

The material properties and durability of cementitious materials depends on both hydration conditions during the construction and resistance against chemical attacks after the construction of buildings. In this study experimental setups were developed to investigate the changes of the phase composition with a high resolution during these different time periods of cementitious materials life. The time resolution for the investigations of the hydration behaviour is down to 30 sec and provides a detailed view into the dynamics of the hydration processes at very early stages. The spatial resolution of the investigations of the microstructure, especially the changes of the phase composition due to sulphate attack, is 10 m and allows reconstructing the chemical attack in detail. In general, the in-situ investigations based on X-Ray diffraction methods using intensive synchrotron radiation (E = 12 KeV) at the spot beamline at BESSY II (HZB, Berlin). Examples for changes of the phase composition of common phase systems are present to show the functionality of both experimental setups and offers new perspectives for technical applications.