Experimental Study on Physicomechanical Properties of Sandstone under Acidic Environment

Table 5

Damage variables of the intermediate scanning layer of the sandstone samples at different time intervals in different solutions.

Solution type	Soaking time (days)	Damage variable ()
pH = 3 H2SO4	30	0.1596
	60	0.2189
	90	0.2703
	120	0.3112
	150	0.3475
	180	0.3698
pH = 1 H2SO4	30	0.2032
	60	0.3098
	90	0.3792
	120	0.4207
	150	0.4813
	180	0.5372