Fig. 24

SEM images and EDS spectra for OPC EP 50, subjected to heating at 650 °C. (a) SEM image of perlite grain, (b) EDS spectrum of perlite grain, (c) SEM image of perlite fragment, (d) EDS spectrum of perlite fragment, (e) SEM image of CSH phase, (f) EDS spectrum of CSH phase.