For modern concrete technology, how to control the generation and propagation of thermal cracks is still a challenge. The large temperature gradient between the internal and external surface is primarily responsible for the cracks. The present study successfully develops a new avenue to minimize the temperature difference of cement composites by introducing reduced graphene oxide (rGO). The effective dispersion of rGO in cement matrix is achieved by applying the polycarboxylate dispersant. The incorporation of rGO enhances the thermal properties of mortar, resulting in a lower temperature difference. The uniformity of calculated heat flux and early-age shrinkage of cement composites are improved by adding rGO. Moreover, the mechanical strength slightly increases at 3 days up to doping 0.6 wt. % rGO and does not display significant enhancement after 28 days. Obtained results demonstrate doping rGO is a promising approach to reduce the thermal stress and restrain the development of thermal cracks.

对于现代混凝土技术，如何控制热裂纹的产生和传播仍然是一个挑战。内表面和外表面之间的大温度梯度是造成裂纹的主要原因。本研究通过引入还原氧化石墨烯（rGO）成功地开发了一条新途径，以最小化水泥复合材料的温差。rGO在水泥基质中的有效分散是通过使用聚羧酸盐分散剂实现的。掺入rGO可以增强砂浆的热性能，从而降低温度差。通过添加rGO，可以提高水泥复合材料的热通量均匀性和早期收缩率。而且，机械强度在3天时略有增加，直至掺杂0.6重量％。％rGO，并且28天后未显示出明显的增强。获得的结果表明，掺杂rGO是降低热应力和抑制热裂纹发展的一种有前途的方法。