E. Fatmawati, S. Sunaryono, M.F. Hidayat, M.N. Kholifah, C.I. Yogihati, A. Taufiq, N. Mufti
Recently, concrete has become a preferable primary raw material in construction, compares to wood and steel. However, some concrete cannot withstand heavy load; they even easily get eroded by seawater. That comes from the cement paste material used in a concrete based building structure. There are various ways to improve cement properties; one of them is by using nanomagnetic material in its production process. This study focuses on the synthesis and characterization of Fe3O4@Co3O4/Al2O3 (FCA) particle that can be composited with cement material to revive the compressive strength of the cement. Co3O4 nanoparticle and Fe3O4@Co3O4/Al2O3 nanocomposite have been successfully synthesized using coprecipitation and sol-gel methods. The Co3O4 nanoparticle and Fe3O4@Co3O4/Al2O3 nanocomposite with Fe3O4@Co3O4 core-shell mass variation was characterized by XRD. The characterization result shows a particle size of 4.9 nm. Meanwhile, the Fe3O4@Co3O4/Al2O3 nanocomposite morphology has been successfully characterized using SEM instrument. The Fe3O4@Co3O4/Al2O3 nanocomposite that tends to get agglomerated is those with an average particle size of 22.9 nm. The characterization results of Shore D in Fe3O4@Co3O4/Al2O3 nanocomposite compressive test show that a concentration increase of Fe3O4@Co3O4 core-shell significantly affects the growth of nanocomposite hardness level with an optimum value of 79.8 MPa for the highest concentration ratio. Therefore, Fe3O4@Co3O4/Al2O3 nanocomposite is a very excellent reinforcing material for cement in the construction field. © Published under licence by IOP Publishing Ltd.
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang No. 5, Malang, 65145, Indonesia; Centre of Advanced Materials for Renewable Energy (CAMRY), Universitas Negeri Malang, Jl. Semarang No. 5, Malang, 65145, Indonesia
