Study of Mechanical Properties Using Carbonized Rice Husk and Eggshell to Prepare Sustainable Concrete and its Viability in Civil Construction

Abstract:

Sustainability has become an increasingly present concern in the construction industry, which has led to a search for more ecological and sustainable alternatives in the production of construction materials. In this context, research references have shown promising results in the use of carbonized rice husk and eggshell. The use of rice husk as a partial substitute for cement in concrete has proven to be effective in reducing environmental impact, since this residue has pozzolanic characteristics, providing greater resistance to the concrete. Eggshell, in turn, has been used as an additive in the production of mortars, providing improvements in the mechanical and thermal properties of these materials. These sustainable solutions in civil construction are aligned with the ESG agenda of companies, which are increasingly seeking minimize the environmental impact of its activities. The study verified through axial compression resistance tests that the composites prepared with 1.5 % (w/w) had superior compressive strength by around 20% compared to the composites prepared with 2 % (w/w). In other words, with a lower concentration it achieved a satisfactory reinforcement effect, better preserving the structure. From the analysis of the diametral compression resistance results, the concentration of 1.5% (w/w) showed a specific reinforcing effect, both with the use of crushed eggshells and with the use of carbonized rice husks dispersed in concrete. The concentration of 1.5% (w/w) showed a specific reinforcing effect, both with the use of crushed eggshells and with the use of carbonized rice husks dispersed in concrete. The lowest content of 1% (w/w) was not enough to reinforce the material, presenting the lowest yield strength values of 2.98 and 3.54 MPa for egg and rice, respectively. The values for 1.5% (w/w) reached values of 4.22 and 4.68 MPa, for egg and rice. Around 20% of the compounds prepared with the highest filler levels, both with crushed eggshell and carbonized rice husk.

• Periodical: Materials Science Forum (Volume 1131)
• Pages: 99-108
• DOI: https://doi.org/10.4028/p-8SbAEJ
• Online since: November 2024
• Authors: Danielle Ferreira dos Santos*, Philippe Bachmeyer de Meirelles, Zaqueu Rodrigues Machado
• Keywords: Carbonized Rice Husk, Eggshell, ESG, Mechanical Properties, Pozzolanic Characteristics

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