Advances in Materials Science and Engineering

Research Article

Average Fracture Energy for Crack Propagation in Postfire Concrete

Table 2

Fracture energies for crack propagation.
SpecimenTemperature (Nm) (m2) (Nm−1) (Nm) (Nm) (Nm) (m2) (Nm−1) (Nm) (m2) (Nm−1)
WS120°C5.620 0.024 234.147 1.217 0.407 0.810 0.005 152.502 4.809 0.019 257.361
WS211.608 483.664 1.575 0.388 1.187 0.003 350.795 10.421 0.021 504.972
WS310.517 438.217 2.124 0.470 1.654 0.007 242.557 8.863 0.017 515.877
WS45.265 219.394 0.994 0.314 0.680 0.006 107.537 4.586 0.018 259.384
WS57.705 321.055 1.693 0.525 1.169 0.005 212.824 6.536 0.019 353.175
Average 8.143  339.295 1.521 0.421 1.100 0.005 213.243 7.043 0.019 378.154
WS665°C7.666 0.024425.907 1.791 0.535 1.255 0.007 281.835 6.411 0.017 480.239
WS78.687 482.619 1.076 0.241 0.835 0.010 113.926 7.852 0.014 768.132
WS88.779 487.745 1.475 0.509 0.966 0.007 208.612 7.813 0.017 602.385
WS98.649 480.507 1.027 0.440 0.587 0.008 118.113 8.062 0.016 656.640
WS109.402 522.360 1.419 0.733 0.686 0.005 210.596 8.716 0.019 614.693
Average 8.637  479.828 1.357 0.492 0.866 0.007 186.616 7.771 0.017 624.418
WS11120°C7.137 0.024 396.516 1.335 0.588 0.746 0.003 251.423 6.391 0.021 416.985
WS129.321 517.822 1.475 0.511 0.964 0.005 178.684 8.357 0.019 616.201
WS1311.785 654.732 2.079 0.560 1.520 0.008 193.937 10.266 0.016 878.097
WS146.218 345.463 1.044 0.312 0.732 0.007 98.944 5.486 0.017 455.357
WS15——————————
Average 8.615 478.633 1.483 0.493 0.991 0.006 180.747 7.625 0.018 591.660
WS16200°C—0.024 —————————
WS176.780 282.509 1.522 0.345 1.176 0.009 123.021 5.604 0.015 385.812
WS185.163 215.135 1.556 0.525 1.031 0.007 146.955 4.132 0.017 243.300
WS195.662 235.913 1.252 0.270 0.982 0.009 104.764 4.680 0.015 320.014
WS208.854 368.937 1.828 0.365 1.463 0.010 145.364 7.391 0.014 530.467
Average 6.615 275.624 1.540 0.376 1.163 0.009 130.026 5.452 0.015 369.898
WS21300°C10.510 0.024 437.920 2.005 0.439 1.566 0.008 188.640 8.944 0.016 568.895
WS2214.675 611.467 3.546 0.820 2.726 0.007 364.621 11.949 0.017 723.160
WS238.202 341.770 2.048 0.579 1.469 0.007 220.394 6.733 0.017 388.453
WS2413.539 564.120 3.065 1.081 1.984 0.005 404.514 11.555 0.019 605.107
WS2513.200 549.990 2.552 0.389 2.163 0.011 190.295 11.037 0.013 870.055
Average 12.025  501.053 2.643 0.662 1.982 0.008 273.693 10.044 0.016 631.134
WS26350°C13.765 0.024 573.540 2.689 0.511 2.179 0.010 211.652 11.586 0.014 845.346
WS2715.639 651.638 2.589 0.703 1.887 0.009 207.566 13.753 0.015 922.314
WS2812.420 517.489 3.827 0.919 2.908 0.010 317.145 9.512 0.014 664.527
WS2911.990 499.602 2.900 0.611 2.289 0.010 228.349 9.701 0.014 694.230
WS3010.905 454.375 2.796 0.475 2.320 0.011 216.312 8.585 0.013 646.739
Average 12.944  539.329 2.960 0.644 2.317 0.010 236.205 10.627 0.014 754.631
WS31400°C12.770 0.024 532.090 2.240 0.484 1.756 0.011 156.074 11.014 0.013 860.665
WS329.526 396.932 2.678 0.656 2.022 0.009 207.133 7.504 0.015 516.314
WS3310.109 421.188 2.411 0.760 1.651 0.007 242.302 8.457 0.017 491.692
WS3414.374 598.926 3.638 0.918 2.720 0.006 401.879 11.654 0.018 668.062
WS35——————————
Average 11.695  487.284 2.742 0.705 2.037 0.008 251.847 9.658 0.016 634.184
WS36450°C14.677 0.024 611.530 3.255 0.779 2.477 0.009 277.088 12.200 0.015 809.983
WS37——————————
WS3811.579 482.451 3.284 0.669 2.615 0.009 303.750 8.964 0.015 582.382
WS3915.914 663.097 3.281 0.704 2.578 0.009 272.015 13.337 0.015 918.284
WS4016.291 678.790 3.847 0.532 3.315 0.011 292.743 12.976 0.013 1023.630
Average 14.057  608.967 3.417 0.671 2.746 0.010 286.399 11.869 0.014 833.570
WS41500°C— 0.024 —————————
WS4210.816 450.668 2.080 0.355 1.725 0.013 138.244 9.091 0.011 831.501
WS4311.434 476.413 2.890 0.743 2.146 0.008 272.496 9.288 0.016 576.031
WS4412.877 536.544 1.495 0.475 1.021 0.006 170.514 11.856 0.018 652.188
WS4510.838 451.571 2.720 0.308 2.412 0.013 186.562 8.426 0.011 785.892
Average 10.496  478.799 2.296 0.470 1.826 0.010 191.954 9.665 0.014 711.403
WS46600°C5.477 0.024 228.226 1.404 0.287 1.117 0.010 110.974 4.361 0.014 312.890
WS479.481 395.057 2.526 0.460 2.066 0.010 213.423 7.415 0.014 517.849
WS4812.941 539.225 2.621 0.389 2.232 0.014 155.808 10.709 0.010 1107.140
WS497.968 331.988 1.514 0.635 0.879 0.010 115.238 7.088 0.014 491.494
WS506.554 273.074 1.749 0.773 0.976 0.009 151.878 5.578 0.015 342.831
Average 8.484  353.514 1.963 0.509 1.454 0.011 149.464 7.030 0.013 632.922