Application of Thermal Insulation Gunite Material to the High Geo-Temperature Roadway

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Cement</td><td class="align_center" rowspan="2">River sand</td><td class="align_center" rowspan="2">Quartz sand</td><td class="align_center" rowspan="2">Thermal conductive powder</td><td class="align_center" rowspan="2">Water-cement ratio</td><td class="align_center" colspan="2">Thermophysical property</td></tr><tr class="thead"><td class="align_center"><i>λ</i><sub>2</sub> (W/(m·K))</td><td class="align_center"><i>α</i><sub>2</sub> (m<sup>2</sup>/s)</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">1</td><td class="align_center">4</td><td class="align_center">0.1</td><td class="align_center">0.07</td><td class="align_center">0.6</td><td class="align_center">1.2</td><td class="align_center">0.8 × 10–6</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Ratio and properties of similar material for surrounding rock [<a href="/journals/ace/2020/8853870/#B9" target="_blank">9</a>].</div>

Advances in Civil Engineering

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Table 1

Table 1: Application of Thermal Insulation Gunite Material to the High Geo-Temperature Roadway 