Tests Research on Grouting Materials of Waste-Concrete-Powder Cement for Goaf Ground Improvement

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr class="thead"><td class="align_center" colspan="2">Setting time (min)</td><td class="align_center" rowspan="2">Water-separation ratio (%)</td><td class="align_center" rowspan="2">Stone rate (%)</td><td class="align_center" rowspan="2">Viscosity (cP)</td><td class="align_center" colspan="3">Compressive strength (MPa)</td></tr><tr class="thead"><td class="align_left">Initial setting time</td><td class="align_center">Final setting time</td><td class="align_center">3 d</td><td class="align_center">7 d</td><td class="align_center">28 d</td></tr><tr><td class="thead-hr" colspan="8"><hr/></td></tr><tr><td class="align_left">590</td><td class="align_center">725</td><td class="align_center">20</td><td class="align_center">80</td><td class="align_center">86.4</td><td class="align_center">5.66</td><td class="align_center">13.38</td><td class="align_center">34.76</td></tr><tr class="table-tr"><td colspan="8"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Test results of the control group.</div>

Advances in Materials Science and Engineering

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Table 4

Table 4: Tests Research on Grouting Materials of Waste-Concrete-Powder Cement for Goaf Ground Improvement 