Experimental Study of the Pore Structure Deterioration of Sandstones under Freeze-Thaw Cycles and Chemical Erosion

Figure 7

Images of sandstones of the H₂SO₄ solution group after different numbers of freeze-thaw cycles: (a) 0; (b) 10; (c) 20; (d) 30. Two different kinds of pore deformation are approximately labelled by ① which indicates new pores are generated and ② which indicates pores are deformed to larger size.

(a)

(b)

(c)

(d)