Physical and Mechanical Properties of Gypsum-Like Rock Materials

Table 2

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

	No.	σ3 (MPa)	σ1 (MPa)	ET (GPa)	E50 (GPa)	c (MPa)	φ (°)
Natural	A4	3	51.16	4.54	3.77	13.18	27
	A5	6	59.79	3.98	3.82
	A6	9	66.80	4.03	4.07
	A7	12	71.49	3.96	4.09
	A8	15	85.13	4.54	5.06
Water saturation	C4	3	34.71	2.79	2.66	11.39	15
	C5	6	40.68	2.25	2.11
	C6	9	45.33	2.37	2.45
	C7	12	47.00	2.62	2.93
	C8	15	56.98	3.49	4.18
45°C dehydration	B4	3	46.75	8.50	7.56	14.25	21.3
	B5	6	55.07	9.24	8.14
	B6	9	62.29	11.02	11.68
	B7	12	66.58	9.62	10.10
	B8	15	72.09	6.61	6.55
220°C high-temperature dehydration	D4	3	35.86	2.86	2.46	8.50	28.7
	D5	6	46.72	1.65	1.82
	D6	9	55.23	2.87	2.90
	D7	12	63.10	2.43	2.94
	D8	15	70.29	2.26	2.88