Physical and Mechanical Properties of Gypsum-Like Rock Materials

Table 1

Uniaxial compression test results of high-strength gypsum powder remolded samples.

	No.	σ1 (MPa)	ET (GPa)	E50 (GPa)
Natural	A1	44.53	4.11	3.59
	A2	42.53	3.96	3.07
	A3	32.84	3.55	2.18
	Average	39.96	3.87	2.95
Water saturation	C1	22.64	2.19	1.05
	C2	20.75	2.02	1.18
	C3	23.21	2.07	1.87
	Average	22.20	2.09	1.36
	No.	σc (MPa)	ET (GPa)	E50 (GPa)
45°C dehydration	B1	47.42	4.96	3.49
	B2	40.02	4.51	3.06
	B3	46.17	4.91	2.83
	Average	44.53	4.79	3.13
220°C high-temperature dehydration	D1	10.18	1.34	0.64
	D2	8.47	1.11	0.60
	D3	8.78	1.00	0.50
	Average	9.14	1.15	0.58