Optimization and Hydration Mechanism of Composite Cementing Material for Paste Filling in Coal Mines

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="9"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Material</td><td class="align_center" colspan="8">Chemical constituents (%)</td></tr><tr class="thead"><td class="align_center">CaO</td><td class="align_center">Al<sub>2</sub>O<sub>3</sub></td><td class="align_center">Fe<sub>2</sub>O<sub>3</sub></td><td class="align_center">SO<sub>3</sub></td><td class="align_center">SiO<sub>2</sub></td><td class="align_center">MgO</td><td class="align_center">Na<sub>2</sub>O</td><td class="align_center">Ignition loss</td></tr><tr><td class="thead-hr" colspan="9"><hr/></td></tr><tr><td class="align_left">Gypsum</td><td class="align_center">38.15</td><td class="align_center">3.18</td><td class="align_center">0.32</td><td class="align_center">44.86</td><td class="align_center">1.73</td><td class="align_center">2.57</td><td class="align_center">0.08</td><td class="align_center">8.38</td></tr><tr class="table-tr"><td colspan="9"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Chemical composition of hardened gypsum.</div>

Advances in Materials Science and Engineering

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Table 3

Table 3: Optimization and Hydration Mechanism of Composite Cementing Material for Paste Filling in Coal Mines 