Karakouzian Moses, Farhangi Visar, Farani Marzieh Ramezani, Joshaghani Alireza, Zadehmohamad Mehdi, Ahmadzadeh Mohammad
Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, NV 89154, USA.
School of Chemical Engineering, College of Engineering, University of Tehran, Tehran 1417466191, Iran.
Materials (Basel). 2021 Mar 11;14(6):1347. doi: 10.3390/ma14061347.
Considering the remarkable characteristics of nanomaterials, previous research studies investigated the effects of incorporating different types of these materials on improving the concrete properties. However, further studies are required to evaluate the complementary hybridization and synergistic influence of nanomaterials. In this research, the combined effect of adding nano silica particles (NS) and multi-walled carbon nanotubes (MWCNT) on enhancing both the compressive and flexural strengths of the cement paste was investigated. Moreover, the morphology of the interface between cement paste and aggregates was studied by scanning electron microscopy (SEM). The mixtures were prepared using three different portions of MWCNT and NS. Electron microscopy images indicated a uniform distribution of nanoparticles in the cement matrix, enhanced hydration reactions, and increased density. Based on the experiments' outcomes, the combined utilization of silica and carbon nanomaterials in the cement paste did not necessarily result in the maximum compressive and flexural strengths. Furthermore, it was observed that the use of higher percentages of pristine NS in the absence of MWCNT can lead to further enhancement of strength properties of the cement paste.
考虑到纳米材料的显著特性，以往的研究探讨了掺入不同类型的这些材料对改善混凝土性能的影响。然而，还需要进一步的研究来评估纳米材料的互补杂交和协同影响。在本研究中，研究了添加纳米二氧化硅颗粒（NS）和多壁碳纳米管（MWCNT）对提高水泥浆体抗压强度和抗折强度的综合作用。此外，通过扫描电子显微镜（SEM）研究了水泥浆体与骨料之间界面的形态。使用三种不同比例的MWCNT和NS制备混合物。电子显微镜图像表明纳米颗粒在水泥基体中分布均匀，水化反应增强，密度增加。基于实验结果，在水泥浆体中联合使用二氧化硅和碳纳米材料不一定能产生最大的抗压强度和抗折强度。此外，观察到在不存在MWCNT的情况下使用更高百分比的原始NS可以进一步提高水泥浆体的强度性能。
