Properties and mechanism of Cu(OH)<inf>2</inf> nanoarray reinforced cement composites: Fid-Bau Portal

Properties and mechanism of Cu(OH)2 nanoarray reinforced cement composites

He, Wei / Liang, Jiangwei / Cui, Ning / Li, Shilei / Zhou, Junshuang / Zhao, Qingxin / Liu, Hongying

Highlights • The preparation method of Cu(OH)2 nanoarray cement mortar was provided. • The effect of Cu(OH)2 nanoarray on properties of cement mortar was discussed. • The mechanism of Cu(OH)2 nanoarray on cement mortar was discussed. • Within the scope of this experiment, the optimal dosage of Cu(OH)2 nanoarray is 0.5%.

Abstract This experiment investigates the effect of Cu(OH)2 nanoarray on the properties of cementitious materials. Cu(OH)2 nanoarray is a novel nanomaterial with excellent electrical conductivity and chemical stability. At present, the interaction mechanism between Cu(OH)2 nanoarray and cementitious materials has not been explored. In this paper, the effect of Cu(OH)2 nanoarray on the properties of cement mortar was investigated by testing the mechanical strength and electrical conductivity of Cu(OH)2 nanoarray. The microstructure of Cu(OH)2 nanoarray cement mortar and the development of hydration products were analyzed using XRD, SEM, EDS and MIP tests. The results showed that when 0.5% Cu(OH)2 nanoarray was added, the 28d compressive strength and flexural strength of the cement mortar increased by 50.29% and 41.28%, respectively, and its electrical resistivity decreased by 50%. The Cu(OH)2 nanoarray optimized the mechanical strength and workability of the cement mortar by modulating the hydration products and improving the microstructure.