Mechanical Properties and Failure Behavior of Composite Samples

Table 2

Uniaxial compressive strength, elastic modulus, and postpeak modulus of RCR samples.

Sample	Height ratio ()	Size (mm)	(MPa)	(GPa)	(GPa)	Note
RCR-0%	0%	φ50 × 100	89.36	8.37	−225.19	Pure sandstone
RCR-10%	10%	φ50 × 100	82.89	7.10	−270.09	RCR
RCR-20%	20%	φ50 × 100	53.30	6.23	−235.00	RCR
RCR-30%	30%	φ50 × 100	47.05	5.52	−114.50	RCR
RCR-40%	40%	φ50 × 100	38.57	4.95	−65.03	RCR
RCR-50%	50%	φ50 × 100	37.94	4.54	−104.16	RCR
RCR-60%	60%	φ50 × 100	32.72	4.16	−75.39	RCR
RCR-80%	80%	φ50 × 100	31.14	3.58	−78.76	RCR
RCR-100%	100%	φ50 × 100	30.64	3.11	−38.98	Pure coal