A Rheological Model of Sandstones considering Response to Thermal Treatment

Figure 4

The micromorphology of sandstone specimens after rheological failure under the environmental scanning electron microscope. Before the rheological test, the specimens have experienced thermal treatment under the temperature of (a) 25°C, (b) 200°C, (c) 400°C, and (d) 600°C, respectively.

(a)

(b)

(c)

(d)