Experimental study on the effect of composite nano-SiO₂ on the durability of concrete
by Guangjuan Gu; Hongling Song
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 17, No. 2/3, 2024

Abstract: To verify the effect of composite nano-SiO₂ on the durability of concrete, this article first analyses the composition of experimental materials and instruments and conducts the preparation of nano-SiO₂ concrete. By conducting experiments on different dosages of nano-SiO₂ and concrete, the effects on concrete strength, impermeability, and carbonation resistance were analysed. The experiment adopts an orthogonal design method, with the dosage of nano-SiO₂, water-cement ratio, and curing time as the main variables, and selects concrete samples with similar physical properties for testing. Through experiments, it is known that adding nano-SiO₂ in concrete can effectively improve the durability of concrete, reaching the highest value at a dosage of 0.1% or 0.15%, improving compressive strength. Concrete with a fly ash content of 30% has the highest working performance. This study provides a strong reference basis for further optimising the concrete mix ratio and improving durability performance.

Online publication date: Mon, 15-Apr-2024

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