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

Table 5

Test results of UCT and DTT for sandstone.

SN	Gauge number	Ec (GPa)	μ	σc (MPa)	SN	Gauge number	Et (GPa)	μ	σt (MPa)
SC1	1, 2	3.9	0.16	24.0	ST2	1, 2	2.4	0.21	0.44
	3, 4	2.8	0.15			3, 4	2.2	0.17
	5, 6	4	0.12			5, 6	3.6	0.30
	7, 8	2.8	0.12			7, 8	—	—
	Mean	3.4	0.14			Mean	2.8	0.23
SC2	1, 2	4.7	—	20.5	ST3	1, 2	—	—	0.99
	3, 4	5.2	—			3, 4	1.9	0.17
	5, 6	2.5	—			5, 6	1.8	0.08
	7, 8	2.9	0.23			7, 8	2.3	0.00
	Mean	3.8	0.23			Mean	2.0	0.08
SC4	1, 2	5.2	0.15	24.7	ST4	1, 2	4.3	0.06	0.54
	3, 4	5	0.13			3, 4	3.5	0.14
	5, 6	3.2	—			5, 6	3.1	0.06
	7, 8	2.5	0.21			7, 8	3.1	—
	Mean	4	0.16			Mean	3.5	0.09
SC5	1, 2	3.9	0.09	21.4	ST5	1, 2	3.8	0.21	0.27
	3, 4	3.2	0.12			3, 4	3.8	0.30
	5, 6	2.6	0.11			5, 6	3.5	0.10
	7, 8	2.9	0.09			7, 8	--	0.40
	Mean	3.2	0.10			Mean	3.7	0.25
SC6	1, 2	2.6	0.10	21.6
	3, 4	2.5	0.08
	5, 6	2.5	0.24
	7, 8	3	0.08
	Mean	2.7	0.13
Total mean		3.4	0.15	22.4	Total mean		3.0	0.16	0.56

Note. The test for ST1 is not successful.