An Experimental Study on the Water-Induced Strength Reduction in Zigong Argillaceous Siltstone with Different Degree of Weathering

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Samples</td><td class="align_center" colspan="2">Natural condition</td><td class="align_center" colspan="2">Saturated condition</td></tr><tr class="thead"><td class="align_center"><svg height="6.1673pt" id="M16" style="vertical-align:-0.2063904pt" version="1.1" viewbox="-0.0498162 -5.96091 5.39742 6.1673" width="5.39742pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M383 397C383 424 344 448 299 448C244 448 172 409 132 375C66 319 23 227 23 146C23 42 74 -12 146 -12C208 -12 298 30 359 103L343 124C315 95 248 48 192 48C145 48 111 85 111 163C111 228 129 294 151 330C171 363 201 401 241 401C275 401 302 384 325 356C332 347 339 344 348 348C373 360 383 381 383 397Z" id="g113-100"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="406" vert-adv-y="406"></glyph.data></g></svg> (MPa)</td><td class="align_center"><i><i>φ</i></i> (°)</td><td class="align_center"><i>c</i> (MPa)</td><td class="align_center"><i><i>φ</i></i> (°)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Highly weathered</td><td class="align_center">0.335</td><td class="align_center">37.55</td><td class="align_center">0.065</td><td class="align_center">26.94</td></tr><tr><td class="align_left">Moderately weathered</td><td class="align_center">1.447</td><td class="align_center">48.30</td><td class="align_center">0.268</td><td class="align_center">45.34</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Shear strength parameters of the silty mudstones under different condition.

Advances in Materials Science and Engineering

tab2

Table 2

Table 2: An Experimental Study on the Water-Induced Strength Reduction in Zigong Argillaceous Siltstone with Different Degree of Weathering 