Comparative Study on the Test Method for Tensile Elastic Modulus of Rock Materials

Table 7

Test results of Brazilian disc test for marble, granite, and sandstone.

Rock materials	SN	Es (GPa)		D (mm)	L (mm)	A	Et (GPa)	σt (MPa)
Marble	MP1	3.0	0.27	49.82	5	1.74	5.1	1.88
	MP2	3.6		49.8			6.2	2.25
	MP3	4.6		49.87			7.9	2.13
	MP4	3.5		49.82			6.0	1.94
	MP5	3.3		49.85			5.7	2.04
	Mean	3.6					6.2	2.05
Granite	GP1	9.8	0.19	49.73	5	1.49	14.7	4.46
	GP2	8.3		49.72			12.4	4.07
	GP3	8.9		49.76			13.3	4.14
	GP4	9.1		49.86			13.6	4.92
	GP5	—		—			—	—
	Mean	9.0					13.5	4.40
Sandstone	SP1	1.7	0.15	49.75	5	1.38	2.4	1.41
	SP2	—		49.74			—	1.02
	SP3	1.8		49.8			2.5	1.02
	SP4	1.9		49.76			2.6	1.20
	SP5	—		49.71			—	0.92
	Mean	1.4					2.5	1.11

Note. The test on GP5, SP2, and SP5 is not successful.