Table 2 Mechanical parameters of specimens under UCT and TCT conditions (average value).
Conditions | Parameter | RC-0 | RCB-15 | RCB-30 | RCB-45 | RCB-60 |
|---|---|---|---|---|---|---|
UCT | Young’s modulus, E (GPa) | 2.96 | 3.09 | 3.47 | 3.54 | 3.18 |
UCS (MPa) | 25.20 | 24.35 | 26.75 | 23.01 | 21.10 | |
Crack closure stress, σcc (MPa) | 5.89 | 6.23 | 6.49 | 5.95 | 6.81 | |
Crack initiation stress, σci (MPa) | 10.20 | 11.61 | 13.03 | 9.72 | 10.93 | |
C = (σci − Pc)/(σp − Pc) | 0.40 | 0.48 | 0.49 | 0.42 | 0.52 | |
Crack damage stress, σcd(MPa) | 20.61 | 18.91 | 24.15 | 19.90 | 18.82 | |
D = (σcd − Pc)/(σp − Pc) | 0.82 | 0.78 | 0.90 | 0.86 | 0.89 | |
TCT | Young’s modulus, E (GPa) | 15.29 | 18.88 | 12.46 | 24.69 | 25.12 |
TCS (MPa) | 73.80 | 37.94 | 47.81 | 58.53 | 27.85 | |
Crack closure stress, σcc (MPa) | 13.80 | 12.93 | 22.81 | 16.10 | 9.36 | |
Crack initiation stress, σci (MPa) | 21.15 | 16.55 | 27.45 | 22.72 | 14.25 | |
C = (σci − Pc)/(σp − Pc) | 0.17 | 0.24 | 0.46 | 0.26 | 0.25 | |
Crack damage stress, σcd(MPa) | 63.25 | 31.61 | 42.10 | 51.00 | 24.25 | |
D = (σcd − Pc)/(σp − Pc) | 0.83 | 0.78 | 0.85 | 0.85 | 0.82 |
