Análise da correlação entre resistência à compressão axial e à tração na flexão em pavimentos rígidos

• Autor(a) principal: Brito, Luciana Rabelo de
• Data de Publicação: 2019
• Outros Autores: Almeida, Antônia Fabiana Marques, Oliveira, Francisco Heber Lacerda de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/56366
• topic: Pavimento; Concreto; Resistência a compressão (simples); Resistência mecânica (de concreto); Cimento Portland

Portland cement concrete is a composite material whose main characteristic for structures is mechanical resistance to compression. However, when it comes to concrete pavement, another mechanical property that stands out is the flexural resistance. This property is an indirect way of obtaining direct tensile the strength, because its test is not much used due to the device that holds the test body to the equipment to insert loads that affect the result obtained. This indirect gain is normalized, and it considers the pure tensile equals to 70% of the obtained value of the flexural test. As tests of compressive strength are more accomplished, the same norm predicts the possibility of obtaining the value of the pure tensile through fck. As concrete is influenced by several external and internal factors, which one often does not have to measure, one assumes that this equation is not valid for all datasets. In this sense, this paper sought, with a set of data obtained from the technological control of the execution of simple concrete slabs of the Fourth Ring Road in Fortaleza, to evaluate the correlation between these parameters. The analyzed results found an equation that differs from that predicted in standard. However, the errors calculated with the application of the two equations are close, so that the existing equation can be applied.