Brittle Characteristic and Microstructure of Sandstone under Freezing-Thawing Weathering

Table 1

Mechanical parameters, porosity, and brittleness index values of the samples subjected to various F-T cycles.

F-T cycles	(GPa)	(GPa)	(10^−3)	(10^−3)	(MPa)	(MPa)	Porosity (%)
0	10.820	117.241	7.995	8.266	31.805	0.000	10.00	27.896
10	10.360	42.969	7.777	8.413	27.323	0.000	12.74	10.660
20	5.560	12.957	8.270	9.382	18.678	4.140	14.64	7.104
30	2.140	5.239	8.412	9.700	7.795	1.382	15.70	6.274
40	0.920	2.415	8.006	9.500	3.608	0.156	17.05	5.345