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<h2 style="white-space:pre-line;text-align:left">Materials </h2>
<p>1.Ordinary Portland cement: 350 kgs per cubic meter. <br />2.Coarse aggregate.<br />3.Sand: clean and free sand was used, with a specific gravity of 2.68, a volume weight of 1640 kg/m3 and a maximum particles size of 4.75mm. Sand to cement ratio was 1 to 3 (2700kg to 900kg)<br />4.Drinking water: Three water to cement ratios were tested: 0,34, 0.4 and 0.45 <br />5.Multilayer graphene: Three graphene to cement ratios were used: 0.01%, 0.02% and 0.03% (100, 200 and 300 ppm), in addition to a control of 0%<br />6.Water reducing agent was used (Superplasticizers - SPZ): Three SPZ to cement ratios were sued: 1.5%, 2l5% ad 3.5% in addition to a control of 0%</p>