TABLE 1. Results for the +T shear test specimens. Specimen Loading (T/C) Pcr(N) KIIf (MPa m) M2t-2 Tensile 2410 1.16 M2T2 Tensile 2615 1.26 M2T3 Tensile 2595 1.25 M2T4 Tensile 2860 1.37 M2T5 Tensile 2835 1.36 M2T6 Tensile 2175 1.05 M2T7 Tensile 2535 1.22 M2T9 Tensile 2880 1.38 M2T11 Tensile 2990 1.43 M2T12 Tensile 2550 1.23 Average 2647 1.27 TABLE 2. Results for the -T shear test specimens. Specimen Loading (T/C) Pcr(N) KIIf (MPa m) M2c-1 Compressive 5340 2.57 M2c-2 Compressive 5000 2.4 M2C1 Compressive 5180 2.5 M2C2 Compressive 4555 2.19 M2C3 Compressive 4190 2.01 M2C4 Compressive 4635 2.23 M2C6 Compressive 4920 2.36 M2C8 Compressive 5710 2.74 M2C9 Compressive 5560 2.67 M2C10 Compressive 5500 2.64 Average 5065 2.43
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