Ricardo Pieralisi

Universidade Federal do Paraná | UFPR · Departamento de Construção Civil

Compaction is a fundamental step in pervious concrete production and affects its mechanical and hydraulic properties. In this study, two pervious concrete mixtures were compacted with three different energies, distributed in two and three layers. The effects on porosity, mechanical strength and hydraulic conductivity were evaluated. The increase in...

The challenging task of structural design under structural safety, economic efficiency and environmental sustainability constraints has led to the development of several efficient materials. In this context, steel fiber reinforced concrete (SFRC) stands out due to the post-cracking behavior related to its enhanced toughness. Recent structural desig...

Pervious concrete, known for its high porosity and permeability, is commonly used for low-traffic pavements. This study investigates the impact of sustainable aggregates on abrasion resistance in pervious concrete, specifically electric furnace slag (EFS), ceramic construction waste (CW), and concrete block waste (CBW). Therefore, an experimental p...

The phenomenon of clogging in pervious concrete (PC) has been one of the main causes of the hydraulic useful life reduction. This phenomenon begins with the partial or total clogging of the pore network and consequently the reduction of the permeability coefficient. Considering that the porous network of the PC is directly related to the aggregate...

Shear strength in reinforced concrete (RC) beams, especially in steel fiber reinforced concrete (SFRC) beams is a subject of great interest in structural engineering. In the case of beams without transverse reinforcement, the failure is explained based on a predefined crack pattern and kinematics, and the transfer of shear force accomplished throug...

A incorporação de nano materiais em compósitos cimentícios tem ganhado bastante atenção devido as melhorias ocasionadas pelo preenchimento dos vazios entre as partículas de cimento. Contudo, para que a utilização destes nano materiais seja eficiente, é necessário que as partículas estejam bem dispersas na mistura. O objetivo deste estudo é avaliar...

Resumo Algumas normativas apresentam recomendações de dimensionamento ao cisalhamento de vigas de concreto reforçado com fibras, porém com diferenças entre si. Desse modo, este artigo tem como objetivo realizar o dimensionamento ao cisalhamento e análise paramétrica de vigas em concreto reforçado com fibras de aço (CRFA) sem estribos, baseando-se n...

Pervious concrete (PC) has gained important ground in civil construction in recent years due to its advantages in managing surface runoff. Numerous studies have been developed to characterize the material mechanically and hydraulically and verify compliance with standards. However, there are still some gaps in the knowledge about the hydraulic beha...

Pervious concretes have been increasingly used since they allow for better water flow. Flow through pervious concrete is usually assessed with Darcy's law, which presupposes linearity between flow rate and hydraulic gradient. However, some researchers reported this does not always hold, especially at faster flows. In such cases, Forchheimer's law m...

Nowadays a large number of products for concrete protection are available on the market and the efficacy of these materials still needs more research. This study aimed to evaluate the efficiency of certain surface treatments (such as polyurethane coating, hydrophobic agents and cementitious crystalline) applied on concrete under chloride ions and c...

This study proposes an alternative numerical strategy that combines different DEM models to simulate the compaction process and predict the mechanical performance of pervious concrete. An experimental program was performed to assess the compressive and tensile behaviours of pervious concrete mixes with 3 aggregate-to-paste content subjected to 3° o...

New building technologies are developed with the goal of improving structural performance. One very promising technology is the steel fiber reinforced concrete (SFRC), in which steel fibers are added in the concrete mixture. Concrete is a fragile material whose tensile resistance is very lower than compressive. Steel reinforcement, as well as steel...

Currently, there is no consolidated methodology that allows the determination of material consumption to obtain the mechanical and hydraulic properties of pervious concrete, which limits the application of this concrete in civil construction. In addition, the most used methodologies for designing pervious concrete are based on testing and repetitio...

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 ultr...

As barragens são infraestruturas hidráulicas de grande relevância socioeconômica e fundamental para a produção de energia hidrelétrica, contribuindo além do abastecimento de água, irrigação, controle de enchentes, usos recreativos e outras atividades. Nesse contexto, as inspeções têm importância estratégica na área de segurança e durabilidade de ba...

O ataque interno de sulfatos pode consumir, entre outros, a portlandita responsável pela manutenção do pH do concreto. Além disso, as variações volumétricas e as fissurações causadas pelo fenômeno podem facilitar a entrada de outros agentes agressivos, favorecendo a corrosão de armaduras. Com o objetivo de estudar a relação, entre a reação sulfátic...

Pervious concrete is a special type of concrete with an open and connected macro-porosity, allowing a flow of water to pass through the material, contributing to the control of urban flooding. It has in its composition little or no aggregated content and the volume of paste just enough to wrap the large aggregates. The objective of this work is to...

The global socioeconomic development, especially in emerging countries, has been led to a demand for better infrastructure conditions. To meet this demand, the production of more building materials is required. The construction industry is responsible for large amounts of carbon dioxide (CO2) emissions. In this way, the main objective of this paper...

In the construction industry, the design of dimensions and material properties is generally separated from the design of material composition and of the production processes used. Such divide is enabled by robust construction materials (like concrete) little affected by production processes if minimum precautionary measures are in place. The same d...

The objective of this study is to compare the tensile behavior in flexure of different crack measurement in steel fibers reinforced mortar specimens after a chloride attack. The cement CP II-F 32, with a specific mass of 3,08 g/cm³, and short hooked steel fibers with 30 mm long and diameter of 0.62 mm were used in the experimental campaign. Moreove...

Este estudo surge a partir da necessidade de analisar a situação do processo de fissuração de uma barragem de concreto, que em algumas áreas se encontra em contato permanente com a água. O padrão de fissuração observado é concordante com o gerado em processos expansivos. Neste trabalho, a metodologia e os ensaios realizados em amostras extraídas de...

The most singular characteristic of pervious concrete is its interconnected porosity that allows water to flow through at high rates. The objective of this paper is to develop and validate an advanced DEM-CFD model to assess the permeability of pervious concrete numerically, taking into account the influence of the composition and of the compaction...

Influence of standard recommendations for the calculation of the column-base connection by socket according to ABNT NBR 9062:2006 Influência das recomendações de norma para o cálculo da ligação entre o pilar e a fundação por meio de cálice segundo a ABNT NBR 9062:2006 Abstract Resumo This work studies the column-base connection by external socket i...

The objective of this paper is to propose a novel numerical approach to evaluate the fresh state behavior of pervious concrete (PC). A new constitutive law applied to Discrete Element Method was developed for the simulation of the interaction between aggregates connected by fresh cement paste. Several innovative aspects regarding the type of contac...

Pervious concrete is a special material with high permeability usually obtained by reducing the amount of fine aggregates in the composition of concrete. The increase in permeability generally implies a reduction in the mechanical performance. The properties of pervious concrete not only depend on its composition but also on the construction method...

This paper presents a simplified model for the simulation of the compaction of deformable granular materials such as pervious concrete in the fresh state. The strategy is to use an evolutionary lattice system with local instability to simulate the intensive internal rearrangement expected during compaction. This is associated with a bar layout and...