[Retracted] Empirical Investigation on Compressive Strength of Geopolymer and Conventional Concretes by Nondestructive Method

<table class="table-group" id="tab7"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Rebound number</td><td class="align_center">Concrete grading</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Above 40</td><td class="align_center">Very good (VG)</td></tr><tr><td class="align_left">30–40</td><td class="align_center">Good (G)</td></tr><tr><td class="align_left">20–30</td><td class="align_center">Fair (F)</td></tr><tr><td class="align_left">Below 20</td><td class="align_center">Poor (P)</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Grading of concrete using the rebound number [<a href="/journals/amse/2021/9575964/#B8" target="_blank">8</a>].</div>

Advances in Materials Science and Engineering

tab7

Table 7

Table 7: [Retracted] Empirical Investigation on Compressive Strength of Geopolymer and Conventional Concretes by Nondestructive Method 