Fig. 11From: Geoenvironmental investigation of Sahure’s pyramid, Abusir archeological site, Giza, EgyptX-ray diffraction patterns of the clay fraction from the core stone sample, where the main peak observed corresponds to swellable clays. The AO sample (black line) corresponds to oriented aggregates without treatment, AO-DM (red line) after treatment with dimethyl sulfoxide, and finally, AO-550° (blue line) treated thermally at 550 °CBack to article page