Mechanical Properties of Sandstones after Freeze-Thaw Cycles and Models for Their Strength Prediction

Table 2

Results of peak strength and elastic modulus.

Group		Degree of saturation = 100%
		Sample 1	Sample 2	Sample 3	Mean	SD^a	COV^b
F-T times-peak strength	5	30.35	32.68	33.56	32.20	1.66	5.2
	10	30.04	32.13	33.26	31.81	1.63	5.1
	20	16.23	17.35	19.23	17.60	1.52	8.6
	40	13.75	14.25	16.32	14.77	1.36	9.2
	60	13.15	14.81	15.26	14.41	1.11	7.7
F-T times-elastic modulus	5	4.29	4.56	4.73	4.53	0.22	4.9
	10	3.66	3.75	3.8	3.74	0.07	1.9
	20	1.77	1.82	2.13	1.91	0.20	10.5
	40	1.53	1.79	1.94	1.75	0.21	12
	60	1.3	1.45	1.51	1.42	0.11	7.7

^aStandard deviation and ^bcoefficient of variation.