Application of High-Strength Lightweight Concrete in Gob-Side Entry Retaining in Inclined Coal Seam

<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">Lightweight aggregate</td><td class="align_center">Bulk density (kg/m<sup>3</sup>)</td><td class="align_center">Particle density (kg/m<sup>3</sup>)</td><td class="align_center">Cylindrical compressive strength (MPa)</td><td class="align_center">Water absorption (%)</td><td class="align_center">Porosity (%)</td><td class="align_center">Maximum grain size (mm)</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">800-grade shale haydite</td><td class="align_center">770</td><td class="align_center">1420</td><td class="align_center">7.6</td><td class="align_center">4.3</td><td class="align_center">54.2</td><td class="align_center">16</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Main properties of lightweight aggregates.</div>

Advances in Materials Science and Engineering

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Table 1

Table 1: Application of High-Strength Lightweight Concrete in Gob-Side Entry Retaining in Inclined Coal Seam 