José Darío Gonzáles Zarpán, Wilber Quispe Prado
DOI: 10.59427/rcli/2024/v24cs.2152-2190
The present research aims to evaluate the influence of the addition of ashes of agro-industrial by-products, such as rice husk ash (RHA), sugarcane bagasse ash (SCBA) and corn cob ash (CCA), in partial replacement of cement, on the mechanical and microstructural properties of conventional concrete. The methodology used was experimental, incorporating ashes in proportions of 4%, 6%, 8% and 10%, and evaluating its effect through tests of compressive strength, indirect traction, bending and modulus of elasticity at 7, 14 and 28 days of curing. Additionally, microstructural analyses were performed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) to characterize the internal structure of the modified concrete. The results showed that the addition of SCBA and RHA, especially in a percentage of 6%, significantly improves the mechanical properties of the concrete, standing out in the compressive and flexural strength. Likewise, an improvement in the internal cohesion and stability of the concrete was observed, which was confirmed through microstructural analyses. In contrast, the use of CCA did not show significant improvements, suggesting that its application should be limited. The research concludes that the use of ash from agro-industrial by-products as a partial substitute for cement not only improves the mechanical and microstructural properties of concrete, but also promotes a sustainable alternative to reduce cement consumption and mitigate the environmental impact of the construction sector.
Pág 2152, 2190 23 Oct
