Characterization of pervious concrete focusing on non-destructive testing

Abstract

This study aims to investigate the properties of pervious concrete focusing on characterization tests by the Ultrasound Method. For this, three mixtures were produced with the paste/aggregate (P/Ag) ratio ranging from 0.45 to 0.65, water to cement ratio (w/c) of 0.3, and all the specimens were compacted with a steel rod. The application of the ultrasound method deserves special attention for the characterization of pervious concrete, due to a lack of research and the potential to develop analytical models for predicting properties from ultrasonic pulse velocity (UPV) as an independent variable. The UPV obtained in this study ranged from 3642 to 4262 m/s for an approximately 12% reduction in porosity, with a correlation (R²) of 0.91. It is noteworthy that the high porosity of pervious concrete causes attenuation of the ultrasonic wave. The measurements of UPV had higher values for specimens with higher densities (R²=0.87), higher compressive and tensile strengths (R² of 0.79 and 0.84, resp.), and lower permeability (R² = 0.91).

Uma análise da viabilidade técnica da aplicação do concreto permeável na pavimentação de calçadas públicas: Um estudo de caso / An analysis of the technical feasibility of the application of permeable concrete in the paving of public sidewalks: A case study

“…Consequentemente, a variedade de materiais de construção disponíveis, incluindo concreto, evoluiu significativamente e melhorou desde então (MARTINS FILHO et al, 2020). De acordo com Pils et al (2019), ao adicionar água a essa mistura, a mistura solta de cimento e agregados minerais se transforma em uma mistura mais espessa e sólida.…”

“…No entanto, sua resistência à tração é cerca de um décimo de sua resistência à compressão. Assim, para melhorar a sua resistência à tração é reforçado com aço, o que cria uma forte ligação com o concreto (MARTINS FILHO et al, 2020;PALMA;SOUZA, 2021).…”

Quantification of Effective Flow Resistivity for Parametric Assessment of Pervious Concrete by Using Ultrasonic Pulse Velocity Method

“…Similarly, the permeability is quantified by performing falling and/or constant head tests, while destructive testing is commonly utilized to evaluate the strength of PC ( 13 ). With recent technological advances, some researchers have also focused on utilizing simple and cost-effective nondestructive methods such as ultrasonic pulse velocity (UPV) ( 14 – 16 ), which is commonly used to assess the quality of traditional concrete. A study showed that the correlations between UPV and PC characteristics were not very strong ( 17 ), while others have reported that UPV presents fairly strong correlations with PC properties ( 16 ).…”

“…With recent technological advances, some researchers have also focused on utilizing simple and cost-effective nondestructive methods such as ultrasonic pulse velocity (UPV) ( 14 – 16 ), which is commonly used to assess the quality of traditional concrete. A study showed that the correlations between UPV and PC characteristics were not very strong ( 17 ), while others have reported that UPV presents fairly strong correlations with PC properties ( 16 ). Another piece of research proposed statistical models to predict the compressive strength and hydraulic conductivity of PC ( 18 ).…”