This page has only limited features, please log in for full access.

Unclaimed
E. Possan
Latin American Institute of Technology, Infrastructure and Territory, Federal University of Latin American Integration, UNILA, Foz Do Iguaçu, Brazil

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Short communication
Published: 05 August 2021 in Case Studies in Construction Materials
Reads 0
Downloads 0

In this study, Young’s moduli (E) of 28-day concrete determined through destructive tests according to NBR 8522-2017 were compared with results of nondestructive tests, such as the ultrasonic pulse velocity (UPV) and impulse excitation technique (IET). Different batches of concrete were prepared by varying the following conditions: water/cement ratio (0.45, 0.55, and 0.65), basaltic aggregate type (originating from Foz do Iguaçu-PR, Toledo-PR, and Guarapuava-PR), and aggregate content (60%, 54%, 48%, and 42%). The results showed that the coarse aggregate source significantly influenced Young’s modulus more than the other factors. The dynamic Young’s moduli were higher by approximately 16% for IET and 28% for UPV. After curing for 28 days, the dynamic Young’s moduli determined at the flexural and longitudinal modes were statistically equal, although the longitudinal mode yielded lower deviations than flexural modes. An equation correlating the dynamic and static Young’s moduli was derived, considering the coarse aggregate density and content. The regression coefficient was 0.811–0.901, with a maximum error of 2.46 GPa. The proposed equation is useful for predicting the static Young’s modulus of concrete using dynamic modulus values obtained from nondestructive methods. Moreover, the proposed equation will improve Brazilian standard test methods, which are based on the natural frequency and UPV.

ACS Style

William De Araujo Thomaz; Dan Yushin Miyaji; Edna Possan. Comparative study of dynamic and static Young's modulus of concrete containing basaltic aggregates. Case Studies in Construction Materials 2021, 15, e00645 .

AMA Style

William De Araujo Thomaz, Dan Yushin Miyaji, Edna Possan. Comparative study of dynamic and static Young's modulus of concrete containing basaltic aggregates. Case Studies in Construction Materials. 2021; 15 ():e00645.

Chicago/Turabian Style

William De Araujo Thomaz; Dan Yushin Miyaji; Edna Possan. 2021. "Comparative study of dynamic and static Young's modulus of concrete containing basaltic aggregates." Case Studies in Construction Materials 15, no. : e00645.

Journal article
Published: 31 July 2021 in Sustainability
Reads 0
Downloads 0

A new formulation to estimate the elastic modulus of concrete containing recycled coarse aggregate is proposed in this work using artificial neural networks (ANN) and nonlinear regression. Up to six predictors variables were used to training 243 ANN. The models were generated based on results obtained from experimental campaigns. Feedforward neural network and Levenberg–Marquardt back propagation algorithm were used for training the ANN. The best ANN was found with the architecture 6-4-2-1 (input -1st hidden layer -2nd hidden layer -output), attaining a root-mean-square error of 2.4 GPa associated with a coefficient of determination of 0.91. Once the ANN model was established, 46,656 concrete samples were created. These were employed to formulate the model using nonlinear regression. The developed model showed a highly efficient performance to predict the elastic modulus. Lastly, considering the parametric study conducted, the results pointed out that the approach can be applied to predict the concrete elastic modulus and can indicate better mix proportions for concretes containing natural and/or recycled coarse aggregates, enabling its use as a simulation tool in the development of engineering projects focused on durability and sustainability.

ACS Style

Emerson Felix; Edna Possan; Rogério Carrazedo. A New Formulation to Estimate the Elastic Modulus of Recycled Concrete Based on Regression and ANN. Sustainability 2021, 13, 8561 .

AMA Style

Emerson Felix, Edna Possan, Rogério Carrazedo. A New Formulation to Estimate the Elastic Modulus of Recycled Concrete Based on Regression and ANN. Sustainability. 2021; 13 (15):8561.

Chicago/Turabian Style

Emerson Felix; Edna Possan; Rogério Carrazedo. 2021. "A New Formulation to Estimate the Elastic Modulus of Recycled Concrete Based on Regression and ANN." Sustainability 13, no. 15: 8561.

Article
Published: 03 January 2021 in Journal of Thermal Analysis and Calorimetry
Reads 0
Downloads 0

Cement industries generate about 7% of global CO2 emissions. To reduce these emissions, this sector aims to improve energy efficiency reducing the clinker content in cement and carbon capture deployment. The CO2 captured in cementitious materials occurs due to the carbonation reaction. This study aims to evaluate the CO2 uptake capacity in rendering mortars produced with recycled construction and demolition waste (CDW) by natural carbonation. Mortars were produced by replacing sand for CDW at rates of 0; 25; 50; 75, and 100% were naturally carbonated in a laboratory environment. Specimens were submitted to the compression test, bulk density, and water absorption. The carbonation profile was determined by phenolphthalein spray test over time. The CO2 captured was evaluated by thermogravimetry. The kinetic model showed that the carbonation reaction occurs more quickly in mortars with a higher substitution content, which is related to the increase in the porosity of the system improving the diffusion processes of CO2, leading to an increase in the carbonation depth. In addition, as the replacement level of CDW increases, the water absorption increases in contrast with the diminishing of the bulk density. Up to 50% of replacement level, samples with CDW showed higher compressive strength than the other cases. Moreover, results showed that the cement mortars with 50 to 75% of sand replacement by CDW, presented the highest amount of CO2 captured at 69 days, leading to 85 kg of CO2 per m3 of mortar. The CO2 capturing through natural carbonation of rendering mortar can be considered as a compensatory strategy in the cycle of life assessment of these materials.

ACS Style

L. Mazurana; P. R. S. Bittencourt; F. R. Scremin; A. Neves Junior; E. Possan. Determination of Co2 capture in rendering mortars produced with recycled construction and demolition waste by thermogravimetry. Journal of Thermal Analysis and Calorimetry 2021, 1 -10.

AMA Style

L. Mazurana, P. R. S. Bittencourt, F. R. Scremin, A. Neves Junior, E. Possan. Determination of Co2 capture in rendering mortars produced with recycled construction and demolition waste by thermogravimetry. Journal of Thermal Analysis and Calorimetry. 2021; ():1-10.

Chicago/Turabian Style

L. Mazurana; P. R. S. Bittencourt; F. R. Scremin; A. Neves Junior; E. Possan. 2021. "Determination of Co2 capture in rendering mortars produced with recycled construction and demolition waste by thermogravimetry." Journal of Thermal Analysis and Calorimetry , no. : 1-10.

Journal article
Published: 01 September 2020 in Revista ALCONPAT
Reads 0
Downloads 0

Este trabalho apresenta a modelagem e análise dos efeitos da corrosão por carbonatação em elementos de concreto armado através de um modelo numérico baseado no Método dos Elementos Finitos. A fim de controlar e minimizar os danos associados à corrosão faz-se necessário deter ferramentas e conhecimento suficientes para entender os efeitos desta manifestação patológica sobre o comportamento mecânico do concreto armado. Diante dos resultados obtidos, constatou-se que a depender do nível de corrosão das armaduras, o elemento de concreto tem seu estado de tensão e deformação comprometido. Ademais, os resultados apontam a eficiência do modelo desenvolvido e a sua aplicabilidade frente à simulação do comportamento mecânico de estruturas de concreto armado sujeitas à corrosão uniforme.

ACS Style

Emerson Felipe Felix; Rogério Carrazedo; Edna Possan; Everton Souza Ramos. Desenvolvimento e análise de um modelo numérico da expansão do concreto armado sujeito à corrosão uniforme. Revista ALCONPAT 2020, 10, 300 -316.

AMA Style

Emerson Felipe Felix, Rogério Carrazedo, Edna Possan, Everton Souza Ramos. Desenvolvimento e análise de um modelo numérico da expansão do concreto armado sujeito à corrosão uniforme. Revista ALCONPAT. 2020; 10 (3):300-316.

Chicago/Turabian Style

Emerson Felipe Felix; Rogério Carrazedo; Edna Possan; Everton Souza Ramos. 2020. "Desenvolvimento e análise de um modelo numérico da expansão do concreto armado sujeito à corrosão uniforme." Revista ALCONPAT 10, no. 3: 300-316.

Journal article
Published: 15 July 2020 in Journal of Cleaner Production
Reads 0
Downloads 0

This work aims to evaluate the use of fine fraction of concrete waste (CW) from construction and demolition waste (CDW) as a replacement for Ordinary Portland cement (OPC) in production of composites. Therefore, the CW was mechanically treated (crushing and sifting) and characterized regarding its granulometry, chemical and mineralogical composition (XRF and XRD) and pozzolanic activity (PAI). The CW fraction used consists of particles with a diameter below 0.15 mm. Mortar specimens with different CW granulometry and replacement content (0%, 15%, 25% and 50%) were produced to test their compressive strength. Also, studies of compressive strength, elasticity modulus, tensile strength and SEM/EDS were carried out in concrete specimens with different replacement content (0%, 15% and 25%). Results show that the studied material has compatible characteristics with Portland cement and can be used in replacement contents up to 25% in mortars and concretes. Furthermore, there were not discrepant changes in elasticity modulus, tensile strength and micrography of concretes, which indicates a potential use of CW as an environmentally friendly alternative in the production of eco-efficient cement.

ACS Style

Thays C.F. Oliveira; Bianca G.S. Dezen; Edna Possan. Use of concrete fine fraction waste as a replacement of Portland cement. Journal of Cleaner Production 2020, 273, 123126 .

AMA Style

Thays C.F. Oliveira, Bianca G.S. Dezen, Edna Possan. Use of concrete fine fraction waste as a replacement of Portland cement. Journal of Cleaner Production. 2020; 273 ():123126.

Chicago/Turabian Style

Thays C.F. Oliveira; Bianca G.S. Dezen; Edna Possan. 2020. "Use of concrete fine fraction waste as a replacement of Portland cement." Journal of Cleaner Production 273, no. : 123126.

Chapter
Published: 14 July 2020 in Hygrothermal Behaviour and Building Pathologies
Reads 0
Downloads 0

This chapter proposes a mathematical model for estimating the concrete carbonation depth and predicting the service life of concrete structures subject to CO2 action, with easily obtainable input data. The input variables are divided into three groups: concrete properties (concrete compressive strength at 28 days, type of cement used, content and type mineral admixture); exposure conditions (a structure is indoors or outdoors, protected or not from rain) and environmental conditions (relative humidity and CO2 content). The model was obtained by coupling the concrete conduct equations reported in the literature, especially the first Fick’s Law. To adjust the model’s coefficients and parameters, 1298 data obtained through experts’ knowledge were used. The model determination coefficient was 0.9860, and the root-mean-square error (RMSE) was 0.3 mm. The model was validated using 298 data of the natural carbonation available in the literature, representing 87% of tested data. The results indicate that the model has the potential to predict the concrete carbonation depth for the boundary conditions that guided its development. It also presents itself as a potential tool for determining the concrete carbonation depth and service life prediction of new or existing structures.

ACS Style

E. Possan; J. J. O. Andrade; D. C. C. Dal Molin; José Luis Duarte Ribeiro. Model to Estimate Concrete Carbonation Depth and Service Life Prediction. Hygrothermal Behaviour and Building Pathologies 2020, 67 -97.

AMA Style

E. Possan, J. J. O. Andrade, D. C. C. Dal Molin, José Luis Duarte Ribeiro. Model to Estimate Concrete Carbonation Depth and Service Life Prediction. Hygrothermal Behaviour and Building Pathologies. 2020; ():67-97.

Chicago/Turabian Style

E. Possan; J. J. O. Andrade; D. C. C. Dal Molin; José Luis Duarte Ribeiro. 2020. "Model to Estimate Concrete Carbonation Depth and Service Life Prediction." Hygrothermal Behaviour and Building Pathologies , no. : 67-97.

Research article
Published: 27 May 2020 in Journal of Building Pathology and Rehabilitation
Reads 0
Downloads 0

In interrupted concrete structures is fundamentally relevant to adopt protective measures, which purpose is minimizing degradation to ensure project life cycle, in addition to subserve a future construction resumption. In this context, this paper presents a case study of prestressed and reinforced concrete structures, located in Foz do Iguaçu, Paraná, Brazil, whose execution was interrupted in 2014. At that time, the constructions were in superstructure execution phase. With an area of 155,000 m2 and investment of $ 31 million, the constructions belong to Brazilian Federal Government and are destined to Federal University of Latin-American Integration (Unila) installations. It was observed that performed protection works were mainly related to exposed reinforcement protection, waterproof and protection of structures in contact with soil, and drainage services execution. The protection costs were approximately 1.4% of investment value, following the Sitter’s “Law of fives". Thus, the technical and economic importance of protective measures adoption in concrete structures that had their works interrupted is noted, so that the case study serves as a model for other buildings in same situation.

ACS Style

E. Possan; C. Berwanger; E. Rigo; E. F. Felix; C. A. C. Brant. Protection of interrupted concrete structure to prevent degradation: a case study. Journal of Building Pathology and Rehabilitation 2020, 5, 1 -14.

AMA Style

E. Possan, C. Berwanger, E. Rigo, E. F. Felix, C. A. C. Brant. Protection of interrupted concrete structure to prevent degradation: a case study. Journal of Building Pathology and Rehabilitation. 2020; 5 (1):1-14.

Chicago/Turabian Style

E. Possan; C. Berwanger; E. Rigo; E. F. Felix; C. A. C. Brant. 2020. "Protection of interrupted concrete structure to prevent degradation: a case study." Journal of Building Pathology and Rehabilitation 5, no. 1: 1-14.

Journal article
Published: 28 June 2019 in Sustainability
Reads 0
Downloads 0

Many current industrial processes, such as water treatment, produce large amounts of waste. The water treatment sludge (WTS) must be properly disposed of and/or used as raw material for application in other sectors, such as the construction industry. The rendering mortar production can be an environmentally friendly alternative to recycle the WTS, this being the object of this research. In this way, mortars were produced with 2.5%, 5%, 7.5%, and 10% calcined WTS to replace natural sand. The water absorption, compressive strength, bond strength, and flexural strength properties were evaluated. A natural carbonation was carried out for the determination of CO2 uptake due to carbonation. The results showed that the incorporation of calcined WTS has an influence on all the properties evaluated. Considering 50 years of service life, the CO2 uptake potential for mortar with 10% calcined sludge WTP is 111 kg CO2/t. In the sustainability approach, it was observed that CO2 uptake due to carbonation is higher in mortars with the addition of WTS, and could be an environmentally friendly alternative that compensates emissions from the cementitious materials production.

ACS Style

Jairo José De Oliveira Andrade; Edna Possan; Matheus Chiaradia Wenzel; Sérgio Roberto Da Silva. Feasibility of Using Calcined Water Treatment Sludge in Rendering Mortars: A Technical and Sustainable Approach. Sustainability 2019, 11, 3576 .

AMA Style

Jairo José De Oliveira Andrade, Edna Possan, Matheus Chiaradia Wenzel, Sérgio Roberto Da Silva. Feasibility of Using Calcined Water Treatment Sludge in Rendering Mortars: A Technical and Sustainable Approach. Sustainability. 2019; 11 (13):3576.

Chicago/Turabian Style

Jairo José De Oliveira Andrade; Edna Possan; Matheus Chiaradia Wenzel; Sérgio Roberto Da Silva. 2019. "Feasibility of Using Calcined Water Treatment Sludge in Rendering Mortars: A Technical and Sustainable Approach." Sustainability 11, no. 13: 3576.

Research article
Published: 05 June 2019 in Journal of Building Pathology and Rehabilitation
Reads 0
Downloads 0

We propose an artificial neural network (ANN) model to predict the CO2 diffusion through the concrete to determine the carbonation depth over time, analyzing the influence of some training algorithm and the network architecture in the ANN learning process. A reliable experimental test database of the non-accelerated test with 278 results of concrete carbonation depth was created from the published literature. It was used to train, test, and validate the model. Altogether, 120 networks had been trained with different characteristics, verifying its performance. In spite of the non-linearity and complexity of the concrete carbonation phenomenon, the proposed ANN model yielded accurate prediction. Results indicate the best training algorithm and the optimum number of neurons in the hidden layer that allows faster ANN training process and generates the most accurate mapping for the concrete carbonation phenomenon. The use of ANN appears as a robust tool easily applied to the study of the concrete carbonation, aiding in decision making in engineering projects focused on durability.

ACS Style

Emerson Felipe Felix; Edna Possan; Rogério Carrazedo. Analysis of training parameters in the ANN learning process to mapping the concrete carbonation depth. Journal of Building Pathology and Rehabilitation 2019, 4, 16 .

AMA Style

Emerson Felipe Felix, Edna Possan, Rogério Carrazedo. Analysis of training parameters in the ANN learning process to mapping the concrete carbonation depth. Journal of Building Pathology and Rehabilitation. 2019; 4 (1):16.

Chicago/Turabian Style

Emerson Felipe Felix; Edna Possan; Rogério Carrazedo. 2019. "Analysis of training parameters in the ANN learning process to mapping the concrete carbonation depth." Journal of Building Pathology and Rehabilitation 4, no. 1: 16.

Articles
Published: 18 October 2018 in Matéria (Rio de Janeiro)
Reads 0
Downloads 0

The water treatment process generates a residue called water treatment plant (WTP) sludge, which needs to be correctly characterized to ensure appropriate disposal or reuse. This study aimed to characterize the centrifuged sludge produced at the Tamanduá WTP, Iguaçu Falls City, Brazil, and considered opportunities for its reuse in the production of concrete for the civil construction industry. Wet sludge (sludge in its natural form) analysis included the determination of total solids, moisture content, density, pH, and inorganic parameters (As, Al, Ba, Cd, Pb, Cr, F, Hg, Ag, and Se) through thermogravimetric analysis, X-ray diffraction, and chemical analysis by X-ray fluorescence and loss ignition. For calcined WTP sludge, chemical and mineralogical composition and laser granulometry were evaluated. The results indicated that calcined sludge had the potential to be used in the production of cement materials; conversely wet sludge did not reach the appropriate safety standards due to the high quantity of organic matter.

ACS Style

Kleber Gomes Ramirez; Edna Possan; Paulo Rodrigo Stival Bittencourt; Charles Carneiro; Mauricio Colombo. Physico-chemical characterization of centrifuged sludge from the Tamanduá water treatment plant (Foz do Iguaçu, PR). Matéria (Rio de Janeiro) 2018, 23, 1 .

AMA Style

Kleber Gomes Ramirez, Edna Possan, Paulo Rodrigo Stival Bittencourt, Charles Carneiro, Mauricio Colombo. Physico-chemical characterization of centrifuged sludge from the Tamanduá water treatment plant (Foz do Iguaçu, PR). Matéria (Rio de Janeiro). 2018; 23 (3):1.

Chicago/Turabian Style

Kleber Gomes Ramirez; Edna Possan; Paulo Rodrigo Stival Bittencourt; Charles Carneiro; Mauricio Colombo. 2018. "Physico-chemical characterization of centrifuged sludge from the Tamanduá water treatment plant (Foz do Iguaçu, PR)." Matéria (Rio de Janeiro) 23, no. 3: 1.

Erratum
Published: 19 September 2018 in Construction and Building Materials
Reads 0
Downloads 0
ACS Style

Patricia S. Lovato; Edna Possan; Denise Carpena Coitinho Dal Molin; Ângela B. Masuero; José Luis D. Ribeiro. Corrigendum to “Modeling of mechanical properties and durability of recycled aggregate concretes” [Constr. Build. Mater. 26 (2012) 437–447]. Construction and Building Materials 2018, 188, 1250 .

AMA Style

Patricia S. Lovato, Edna Possan, Denise Carpena Coitinho Dal Molin, Ângela B. Masuero, José Luis D. Ribeiro. Corrigendum to “Modeling of mechanical properties and durability of recycled aggregate concretes” [Constr. Build. Mater. 26 (2012) 437–447]. Construction and Building Materials. 2018; 188 ():1250.

Chicago/Turabian Style

Patricia S. Lovato; Edna Possan; Denise Carpena Coitinho Dal Molin; Ângela B. Masuero; José Luis D. Ribeiro. 2018. "Corrigendum to “Modeling of mechanical properties and durability of recycled aggregate concretes” [Constr. Build. Mater. 26 (2012) 437–447]." Construction and Building Materials 188, no. : 1250.

Articles
Published: 01 February 2018 in Revista IBRACON de Estruturas e Materiais
Reads 0
Downloads 0

While the cement plant is considered one of the most polluting industry, responsible for about 5% of global CO2 emissions, the concrete has the potential to uptake this gas through the carbonation process, offset in part the emissions generated in its production. With the purpose to analyze this process, this study aims to evaluate emissions and CO2 uptake with cement content 300-580 kg produced with different cement types (CP II F, CP II E, CP II Z, CP III, CP IV and CP V). Through mathematical modeling, the emissions balance was made, identifying the mix that shows good resistance to carbonation and greater absorption of CO2 during the concrete life cycle. The results show that concrete with cement consumption between 380 and 420 kg/m³ showed better balance emissions.

ACS Style

E. F. Felix; E. Possan. Balance emissions and CO2 uptake in concrete structures: simulation based on the cement content and type. Revista IBRACON de Estruturas e Materiais 2018, 11, 135 -162.

AMA Style

E. F. Felix, E. Possan. Balance emissions and CO2 uptake in concrete structures: simulation based on the cement content and type. Revista IBRACON de Estruturas e Materiais. 2018; 11 (1):135-162.

Chicago/Turabian Style

E. F. Felix; E. Possan. 2018. "Balance emissions and CO2 uptake in concrete structures: simulation based on the cement content and type." Revista IBRACON de Estruturas e Materiais 11, no. 1: 135-162.

Journal article
Published: 01 February 2018 in Construction and Building Materials
Reads 0
Downloads 0
ACS Style

Jairo Andrade; Edna Possan; Jéssica Zamboni Squiavon; Tiago Luis Possebon Ortolan. Evaluation of mechanical properties and carbonation of mortars produced with construction and demolition waste. Construction and Building Materials 2018, 161, 70 -83.

AMA Style

Jairo Andrade, Edna Possan, Jéssica Zamboni Squiavon, Tiago Luis Possebon Ortolan. Evaluation of mechanical properties and carbonation of mortars produced with construction and demolition waste. Construction and Building Materials. 2018; 161 ():70-83.

Chicago/Turabian Style

Jairo Andrade; Edna Possan; Jéssica Zamboni Squiavon; Tiago Luis Possebon Ortolan. 2018. "Evaluation of mechanical properties and carbonation of mortars produced with construction and demolition waste." Construction and Building Materials 161, no. : 70-83.

Journal article
Published: 31 January 2018 in Revista ALCONPAT
Reads 0
Downloads 0

O presente trabalho apresenta uma análise numérica da vida útil de estruturas de concreto armado sujeitas à corrosão uniforme. O processo de modelagem foi dividido em dois estágios, iniciação e propagação. A modelagem da fase de iniciação foi feita via Redes Neurais Artificiais (RNA) enquanto que a fase de propagação foi modelada através do Método dos Elementos Finitos (MEF). Os resultados demonstram que o modelo gerado pelo acoplamento das RNA ao MEF, possibilita de forma eficiente, a simulação da degradação de estruturas de concreto armado devido à ação da corrosão uniforme e, a aplicabilidade da ferramenta numérica quanto a previsão da vida útil destas estruturas.

ACS Style

Emerson Felipe Felix; Tito José Rodrigues Balabuch; Mariana Corrêa Posterlli; Edna Possan; Rogério Carrazedo. Análise da vida útil de estruturas de concreto armado sob corrosão uniforme por meio de um modelo com RNA acoplado ao MEF. Revista ALCONPAT 2018, 8, 1 -15.

AMA Style

Emerson Felipe Felix, Tito José Rodrigues Balabuch, Mariana Corrêa Posterlli, Edna Possan, Rogério Carrazedo. Análise da vida útil de estruturas de concreto armado sob corrosão uniforme por meio de um modelo com RNA acoplado ao MEF. Revista ALCONPAT. 2018; 8 (1):1-15.

Chicago/Turabian Style

Emerson Felipe Felix; Tito José Rodrigues Balabuch; Mariana Corrêa Posterlli; Edna Possan; Rogério Carrazedo. 2018. "Análise da vida útil de estruturas de concreto armado sob corrosão uniforme por meio de um modelo com RNA acoplado ao MEF." Revista ALCONPAT 8, no. 1: 1-15.

Research article
Published: 20 January 2018 in Journal of Building Pathology and Rehabilitation
Reads 0
Downloads 0

This paper presents a conceptual framework methodology concerning service life prediction of concrete structures by using deterministic or probabilistic processes, which are included from collecting data until the decision-making. This methodology provides guidelines to generate new degradation models and accomplish new service life studies of either existing structures or new ones in literature. In the first case, it is possible to estimate how many years are necessary for the structure to reach the desired limit state (durability, service or of security). It can also provide support in project design by selecting durability requirements such as covering thickness, concrete strength, type of cement, water–cement ratio, among other factors that influence the service life of concrete structures.

ACS Style

E. Possan; D. C. C. Dal Molin; J. J. O. Andrade. A conceptual framework for service life prediction of reinforced concrete structures. Journal of Building Pathology and Rehabilitation 2018, 3, 2 .

AMA Style

E. Possan, D. C. C. Dal Molin, J. J. O. Andrade. A conceptual framework for service life prediction of reinforced concrete structures. Journal of Building Pathology and Rehabilitation. 2018; 3 (1):2.

Chicago/Turabian Style

E. Possan; D. C. C. Dal Molin; J. J. O. Andrade. 2018. "A conceptual framework for service life prediction of reinforced concrete structures." Journal of Building Pathology and Rehabilitation 3, no. 1: 2.

Journal article
Published: 01 January 2018 in Journal of Cleaner Production
Reads 0
Downloads 0
ACS Style

Silvana Ligia Vincenzi; Edna Possan; Dalton Francisco de Andrade; Mateus Mestriner Pituco; Tiago De Oliveira Santos; Ermínio Pita Jasse. Assessment of environmental sustainability perception through item response theory: A case study in Brazil. Journal of Cleaner Production 2018, 170, 1369 -1386.

AMA Style

Silvana Ligia Vincenzi, Edna Possan, Dalton Francisco de Andrade, Mateus Mestriner Pituco, Tiago De Oliveira Santos, Ermínio Pita Jasse. Assessment of environmental sustainability perception through item response theory: A case study in Brazil. Journal of Cleaner Production. 2018; 170 ():1369-1386.

Chicago/Turabian Style

Silvana Ligia Vincenzi; Edna Possan; Dalton Francisco de Andrade; Mateus Mestriner Pituco; Tiago De Oliveira Santos; Ermínio Pita Jasse. 2018. "Assessment of environmental sustainability perception through item response theory: A case study in Brazil." Journal of Cleaner Production 170, no. : 1369-1386.

Journal article
Published: 29 September 2017 in Revista ALCONPAT
Reads 0
Downloads 0

O presente trabalho tem como objetivo analisar parametricamente a influência dos principais fatores que afetam o avanço da carbonatação em estruturas de concreto. Para tal, desenvolveu-se um modelo numérico empregando Redes Neurais Artificiais (RNAs) do tipo Multi-Layer Perceptron, sendo concebido em linguagem orientada a objetos C++, o qual foi testado com dados reais de degradação disponíveis na literatura. Os resultados obtidos na análise paramétrica reforçam conceitos já conhecidos na literatura, demonstrando a eficiência de RNAs no estudo da carbonatação do concreto, além de agregar conhecimento à área de patologia das construções.

ACS Style

Emerson Felipe Felix; Rogério Carrazedo; Edna Possan. Análise paramétrica da carbonatação em estruturas de concreto armado via Redes Neurais Artificiais. Revista ALCONPAT 2017, 7, 302 -316.

AMA Style

Emerson Felipe Felix, Rogério Carrazedo, Edna Possan. Análise paramétrica da carbonatação em estruturas de concreto armado via Redes Neurais Artificiais. Revista ALCONPAT. 2017; 7 (3):302-316.

Chicago/Turabian Style

Emerson Felipe Felix; Rogério Carrazedo; Edna Possan. 2017. "Análise paramétrica da carbonatação em estruturas de concreto armado via Redes Neurais Artificiais." Revista ALCONPAT 7, no. 3: 302-316.

Journal article
Published: 11 September 2017 in Management of Environmental Quality: An International Journal
Reads 0
Downloads 0

The purpose of this paper is to address the use of sludge from water treatment plant (WTP sludge), in its natural form (wet), in the construction industry, especially in the production of concrete, evaluating the effects of replacing natural sand with different WTP sludge levels in the concrete properties. The dosage study evaluated mixtures with replacement levels of 0, 5, 7 and 10 percent of wet sludge in relation to the mass of natural sand, analyzing their effects on mechanical properties and water absorption in concrete with water/cement (w/c) ratios of 0.45, 0.55 and 0.65. From the results obtained, it is possible to note that the addition of WTP sludge in its natural form (wet) reduces the strength of concrete. However, from a technical point of view, a level of replacement of up to 5 percent for applications in concrete is suitable, provided that it is not structural concrete. Further studies should be conducted to verify the influence of the replacement of sand for heat-treated sludge in concrete properties, also analyzing the environmental viability linked to the calcination process. Few studies are conclusive in relation to the use of WTP sludge in concrete production. This study shows statistically the negative effect of the addition of wet sludge in the mechanical properties and in the water absorption of concretes from different w/c ratios.

ACS Style

Kleber Gomes Ramirez; Edna Possan; Bianca Gabriel Dos Santos Dezen; Mauricio Colombo. Potential uses of waste sludge in concrete production. Management of Environmental Quality: An International Journal 2017, 28, 821 -838.

AMA Style

Kleber Gomes Ramirez, Edna Possan, Bianca Gabriel Dos Santos Dezen, Mauricio Colombo. Potential uses of waste sludge in concrete production. Management of Environmental Quality: An International Journal. 2017; 28 (6):821-838.

Chicago/Turabian Style

Kleber Gomes Ramirez; Edna Possan; Bianca Gabriel Dos Santos Dezen; Mauricio Colombo. 2017. "Potential uses of waste sludge in concrete production." Management of Environmental Quality: An International Journal 28, no. 6: 821-838.

Research article
Published: 29 June 2017 in Journal of Building Pathology and Rehabilitation
Reads 0
Downloads 0

Nowadays an amount of reinforced concrete structures are presenting problems related with corrosion of reinforcement, mainly that induced by chloride ions. So, many studies are being accomplished to predict the necessary time for chloride ions reach the reinforcement, beginning the propagation of corrosive process. In this paper, three models were selected for analysis to determine their ability in properly predicting the chloride penetration in concrete structures: the solution of 2nd Fick’s Law, the complete solution of 2nd Fick’s Law, considering the variation of diffusion coefficient and the superficial concentration of chlorides in time; and a model proposed. Analysis of the formulations principles and assessment and applicability of equations were made, taking into account the adequate choice of parameters and variables involved, the difficulty to obtain these parameters, and if the models represent properly the natural phenomena. In order to contribute with the service life prediction of the structures when inserted in saline environments, a mathematical model was developed based in a Focus Groups analysis. Some of the main characteristics of the proposed model are the logic applied for its development and the application easiness. This model was applied in a case study to verify the answer in relation to chloride penetration in some points of a reinforced concrete structure inserted in a saline area. The behavior of the model was consistent with the results of experimental investigations accomplished by other researchers.

ACS Style

J. J. O. Andrade; Edna Possan; D. C. C. Dal Molin. Considerations about the service life prediction of reinforced concrete structures inserted in chloride environments. Journal of Building Pathology and Rehabilitation 2017, 2, 1 .

AMA Style

J. J. O. Andrade, Edna Possan, D. C. C. Dal Molin. Considerations about the service life prediction of reinforced concrete structures inserted in chloride environments. Journal of Building Pathology and Rehabilitation. 2017; 2 (1):1.

Chicago/Turabian Style

J. J. O. Andrade; Edna Possan; D. C. C. Dal Molin. 2017. "Considerations about the service life prediction of reinforced concrete structures inserted in chloride environments." Journal of Building Pathology and Rehabilitation 2, no. 1: 1.

Journal article
Published: 01 June 2017 in Case Studies in Construction Materials
Reads 0
Downloads 0

The cement manufacturing process accounts for about 5% CO2 (carbon dioxide) released into the atmosphere. However, during its life cycle, concrete may capture CO2 through carbonation, in order to, partially, offset the impact of its production. Thus, this paper aims at studying the CO2 uptake potential of the Itaipu Dam due to concrete carbonation of such material. So, 155 cores were extracted from the concrete dam in different points to measure carbonation depth. In order to evaluate its influence on carbonation, the measurement of internal moisture distribution in concrete was also carried out. The results have shown that carbonation takes part of the whole dam area, indicating CO2 uptake potential. Up to the present moment, 13,384 tons of CO2 have been absorbed by concrete carbonation of the Itaipu Dam

ACS Style

Edna Possan; William De Araujo Thomaz; Gustavo A. Aleandri; Emerson Felix; Ana Carolina Parapinski dos Santos. CO 2 uptake potential due to concrete carbonation: A case study. Case Studies in Construction Materials 2017, 6, 147 -161.

AMA Style

Edna Possan, William De Araujo Thomaz, Gustavo A. Aleandri, Emerson Felix, Ana Carolina Parapinski dos Santos. CO 2 uptake potential due to concrete carbonation: A case study. Case Studies in Construction Materials. 2017; 6 ():147-161.

Chicago/Turabian Style

Edna Possan; William De Araujo Thomaz; Gustavo A. Aleandri; Emerson Felix; Ana Carolina Parapinski dos Santos. 2017. "CO 2 uptake potential due to concrete carbonation: A case study." Case Studies in Construction Materials 6, no. : 147-161.