Mechanical Properties and Statistical Damage Constitutive Model of Rock under a Coupled Chemical-Mechanical Condition

Table 3

Elastic modulus of sandstone specimens treated with chemical corrosion at various confining pressures.

Chemical environment	Confining pressures (MPa)	Actual elastic modulus (GPa)	Predicted elastic modulus (GPa)	Error (%)
H2SO4 solution	0	9.19	10.11	10.03
	5	10.52	10.96	4.21
	10	11.61	11.57	0.34
	15	12.15	12.08	0.59
	20	12.75	12.45	2.33
	25	12.93	12.76	1.33
NaOH solution	0	9.41	10.35	9.98
	5	10.84	11.20	3.34
	10	11.93	11.86	0.59
	15	12.18	12.37	1.60
	20	12.86	12.77	0.71
	25	13.27	13.06	1.58
Distilled water	0	10.48	10.67	1.78
	5	11.37	11.53	1.41
	10	12.24	12.22	0.18
	15	12.63	12.74	0.84
	20	12.95	13.13	1.41
	25	13.65	13.45	1.44