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 … Show more
“…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.…”
Section: Concreto: Conceitos Gerais E Definiçõesunclassified
“…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).…”
Section: Concreto: Conceitos Gerais E Definiçõesunclassified
tem capacidade técnicas, que pode em muitos casos solucionar os problemas causados pelas fortes chuvas que caem sobre as grandes cidades causando assim as enchentes nas áreas urbanas.
“…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.…”
Section: Concreto: Conceitos Gerais E Definiçõesunclassified
“…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).…”
Section: Concreto: Conceitos Gerais E Definiçõesunclassified
tem capacidade técnicas, que pode em muitos casos solucionar os problemas causados pelas fortes chuvas que caem sobre as grandes cidades causando assim as enchentes nas áreas urbanas.
“…The properties of pervious concrete are studied by Filho et al [38], focusing on UPV. Three pervious concrete mixes were poured, with a binder-to-aggregate (B/Ag) ratio varying from 0.45 to 0.65 and a water-to-cement ratio (w/c) of 0.3.…”
Ensuring quality in pervious concrete poses challenges, limiting its use. This work investigates the potential of machine learning to forecast its properties, offering a novel and accessible approach. Five machine learning techniques were employed on 300 experimental data points, considering mix parameters (aggregate size, ratio, compaction) and non-destructive measurement (ultrasonic velocity, resistivity). Artificial Neural Networks (ANNs) excelled, achieving high accuracy (R2 > 0.97) for prediction of porosity and compressive strength. Sensitivity analysis revealed the dominant influence of compaction energy, aggregate-to-cement ratio, and ultrasonic velocity, while aggregate size and resistivity had minimal impact. This study suggests that machine learning models, particularly ANNs, can be reliable and efficient for predicting pervious concrete properties. This has the potential to improve quality control and encourage broader adoption in the construction sector, ultimately leading to more sustainable and permeable infrastructure.
“…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 ).…”
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confidence: 99%
“…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 ).…”
The use of nondestructive ultrasonic pulse velocity (UPV) testing to assess the hardened properties of pervious concrete (PC) mixtures is an emerging research area. Further, UPV has been successfully used to determine the effective flow resistivity (EFR) of asphalt concrete and cement concrete pavements. However, no research studies have focused on understanding PC characteristics using EFR. Thus, the major objectives of this study were to assess the suitability of UPV testing for characterizing PC mixtures and to quantify their EFR, which is a measure of the material’s characteristic impedance and is dependent on the mix variables along with porosity. Thirty-six control and sand-modified PC mixtures were prepared with four aggregate gradations, and three levels each of water-to-cement (w/c) and aggregate-to-cement (a/c) ratios. Test results indicated that EFR was significantly dependent on the mix variables, with aggregate gradation being the most influential factor (six and eight times higher than w/c and a/c ratios, respectively). Lower EFR or higher sound absorption capacity was reported for PC with higher porosities. The sand-modified PC mixtures had higher EFR (by 4%–12%) than the control PC, and consequently lower sound absorption capacity, attributed to the presence of mortar that densified the mixes. Further, good-to-excellent correlations were obtained for various PC properties with UPV and EFR, which underscored the potential of UPV in characterizing PC. The major contribution of this research was the development of a simple, fast, and cost-effective approach, which can be suitably adopted as a quality-control test to determine PC mixture properties.
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