An Experimental Evaluation of the Weathering Effects on Mine Shaft Lining Materials

Table 3

Brick: compressive strength, tangent modulus, and secant modulus.

	Solutions
Phase	Potable water	Mine water	Aggressive solution
Compressive strength (MPa)
Phase 0 (0 weeks)	11.66	11.66	11.66
Phase 1 (16 weeks)	9.16	12.38	12.18
Phase 2 (32 weeks)	—	14.26	11.05
Phase 3 (48 weeks)	12.08	15.52	13.54
Tangent modulus (GPa)
Phase 0 (0 weeks)	3.06	3.06	3.06
Phase 1 (16 weeks)	2.72	2.38	2.93
Phase 2 (32 weeks)	—	4.82	3.47
Phase 3 (48 weeks)	3.51	6.16	3.15
Secant modulus (GPa)
Phase 0 (0 weeks)	2.28	2.28	2.28
Phase 1 (16 weeks)	1.81	2.03	2.36
Phase 2 (32 weeks)	—	3.77	2.42
Phase 3 (48 weeks)	2.92	4.91	2.45