Average Fracture Energy for Crack Propagation in Postfire Concrete

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="143208.fig.005a" src="https://static.hindawi.com/articles/amse/volume-2013/143208/figures/143208.fig.005a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Fracture surface of 20°C</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="143208.fig.005b" src="https://static.hindawi.com/articles/amse/volume-2013/143208/figures/143208.fig.005b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Fracture surface of 600°C</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="143208.fig.005c" src="https://static.hindawi.com/articles/amse/volume-2013/143208/figures/143208.fig.005c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Fracture surfaces at typical temperatures (20°C, 200°C, 350°C, 450°C, and 600°C)</td></tr></table></td></tr></table>

<table>Fracture surfaces of postfire specimens.</table>

Advances in Materials Science and Engineering

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Figure 5

Figure 5: Average Fracture Energy for Crack Propagation in Postfire Concrete 