Análise experimental das propriedades mecânicas de concreto permeável dosado com o modelo de empacotamento compressível

• Ano de defesa: 2025
• Autor(a) principal: Oliveira, Jonathan Duarte
• Orientador(a): Kosteski, Luis Eduardo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Pampa
• Programa de Pós-Graduação: Mestrado Acadêmico em Engenharia
• Departamento: Campus Alegrete
• País: Brasil
• Palavras-chave em Português: Engenharia; Concreto permeável; Propriedades mecânicas; Engineering; Pervious concrete; Mechanical properties
• Área do conhecimento CNPq: ENGENHARIAS
• Link de acesso: https://repositorio.unipampa.edu.br/handle/123456789/10259

Pervious concrete emerges as a sustainable solution to mitigate urban drainage problems and surface water runoff. However, dosage parameters, compaction, and the ideal geometry of test specimens are still not fully standardized, which hinders the achievement of consistent performance. This study aims, through the use of the compressible packing model, to produce an optimized pervious concrete mixture that presents satisfactory mechanical properties for application in pavements with light vehicle traffic and, as a result, attenuates issues related to urban drainage. Initially, na existing pervious concrete composition was evaluated by analyzing the effects of the geometric shape of the specimens, molding procedures, and different test standards related to the mechanical properties of the material. These preliminary tests allowed the definition of methodological protocols that prioritized execution practicality, reduced operational time in the laboratory, and decreased raw material consumption. Based on this information, the research focused on finding a mix dosage, using the compressible packing model, capable of maximizing the structural performance of pervious concrete, especially its flexural tensile strength. The implementation of the model resulted in the optimization of mechanical properties, with particular emphasis on flexural tensile strength values, which exceeded 2 MPa, minimum value established by NBR 16416 (2015) for use in pavements subjected to light vehicle traffic. Subsequently, the addition of siliceous materials to the optimized mixture was investigated. The addition of silica obtained from rice husk ash provided improvements in the mechanical properties of the material, with increases of 5.8% in flexural tensile strength, 18.6% in axial compressive strength, and 3.4% in splitting tensile strength compared to the reference mixture at 28 days of age. Finally, a good correspondence was observed between the experimental values and those theoretically estimated by means of the dosage method, indicating its reliability and the feasibility of complementary simulations for the formulation of new compositions.