Navegando por Autor "Baracho, Isabelle Santos"

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    Concreto ecoeficiente impermeável com geração de créditos de carbono
    (2026-02-20) Lima, Esdras Márcio Araújo; Costa, Esdras Jonathan Honorato; http://lattes.cnpq.br/6045970740812728; Santos Filho, Manoel Martins dos; http://lattes.cnpq.br/8060697649276101; Manoel Martins dos Santos Filho; Silva, Joao Gilberto Teixeira; http://lattes.cnpq.br/1438396653085065; Dantas, Vinicius; http://lattes.cnpq.br/6043085975649062
    Given the projected growth of the construction industry until 2030 and the guidelines of the National Circular Economy Strategy (ENEC) for 2025, this research addresses the urgent need to mitigate CO₂ emissions in concrete production. The overall objective was to determine the experimental mix design of an eco-efficient waterproof concrete, partially replacing Portland cement with silica fume and incorporating a crystallizing additive, aiming to generate carbon credits through material efficiency. The methodology adopted the ABCP mix design method to produce and compare two groups: Conventional Concrete (CC) and Eco-efficient Concrete (CE) with 10% cement replacement by silica and 0.8% Penetron Admix waterproofing additive. Technological validation involved axial compression strength tests, capillary absorption, and microstructural analysis via SEM and EDS. The results demonstrated the technical superiority of CE, which reached 35.29 MPa at 28 days, an increase of 7.1% compared to conventional concrete. In addition to presenting a drastic 80.25% reduction in permeability, validated by the formation of crystals in the microstructure, the dosage strategy allowed for savings of 44.44 kg of cement per cubic meter in environmental terms, resulting in the mitigation of 0.02844 tons of CO₂/m³, which enables the generation of equivalent carbon credits. The economic analysis indicated that, although the initial cost of CE (R$ 832.97/m³) is higher than that of CC (R$ 562.36/m³), the solution is justified by its extended durability and alignment with ESG criteria, transforming technical efficiency into a financial and environmental asset for the civil construction sector.