Testing of Action of Direct Flame on Concrete

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left">Mixture</td><td align="center">Exposure time</td><td align="left">Description</td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left">CEM I - GR-PF</td><td align="center">7 min</td><td align="left">First crack formed on the side with thermocouples, where moisture escapes</td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left">CEM III/B - B-PF</td><td align="center">—</td><td align="left">With no outstanding changes during heating</td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left">CEM III/B - B-SF</td><td align="center">—</td><td align="left">With no outstanding changes during heating</td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left">CEM III/B - B</td><td align="center">—</td><td align="left">With no outstanding changes during heating</td></tr><tr><td align="center" colspan="3"><hr/></td></tr><tr><td align="left" rowspan="3">CEM I - GR-SCC</td><td align="center">1 min</td><td align="left">Explosive spalling (depth approx. 5 mm)</td></tr><tr><td align="center">2 min</td><td align="left">Another explosive spalling</td></tr><tr><td align="center">4 min</td><td align="left">Escape of moisture from side walls of the specimen, extensive escape of moisture and water vapor where the second thermocouple is fixed</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Description of individual specimens during heating.

The Scientific World Journal

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Table 4

Table 4: Testing of Action of Direct Flame on Concrete 