Navegando por CNPq "CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::CONSTRUCAO CIVIL"

Agora exibindo 1 - 20 de 40

Acesso aberto (Open Access)
A implantação de obras civis e de saneamento na Bacia do Una, em Belém do Pará, e as condicionantes relacionadas às características geológicas e geotécnicas
(Universidade Federal do Pará, 2004-04-26) SILVA, Kleber Roberto Matos da; ALENCAR JÚNIOR, Júlio Augusto de; http://lattes.cnpq.br/3663658632717465
This Thesis presents the civil engineering works for implementation of drainage and sanitation facilities in the area of influence of the Una canal, in the city of Belém, in the State of Pará, Brazil, involving the installation of drainage, water and sewer nets as well as road construction. This project, known as Project Una, involves an area of 3.644 ha, corresponding to approximately 21% of the continental area of city, with great part of its surface below flood level, that is, up to 3,60 m above sea level. The stratigrafy of the project area is composed basically of a thick superficial layer of very soft organic clay, that in some cases may reach over 60 m deep, overling intercalation of medium to compact sand layers and medium to hard silty clay layers. Besides the construction difficulties in soils of this nature, this work presents the many problems to resolved, as the resettlement of families of risk areas, that is, families that are living on the bed of channels, hindering the draining of the served waters and pluvial waters; the compensations of shaky residences for the works; the lack of physical space for the setting up of the works; the instability of the slopes of the marginal road of channels; the difficulties of management in the of face the extensive encircle of the area; the relationships with the community, tumultuated in some moments and, mainly, the priority of some areas, in detriment of other, for the execution of the works, in the face of available resources. Based in technical reports, projects and the author's personal experiences the thesis makes a description of the project in its several aspects, as well, makes a critical review of it, under the civil engineering’s point of view, involving planning and executions aspects of the works, with the purpose of building and setting up of the knowledge, that promote the improvement in future development in the similar projects.
Acesso aberto (Open Access)
Alternativas para o abastecimento energético dos fornos de indústrias cerâmicas localizadas no município de São Miguel do Guamá-PA
(Universidade Federal do Pará, 2013-08-14) ROCHA, Alexander Lobo; NEVES, Renato Martins das; http://lattes.cnpq.br/6538317425557058
Economic and environmental differentials incorporated biomass energy has driven the spread of supply and use of biofuels in developed and developing countries. In the state of Pará (Brazil), the growing demand for biomass like acai lump and legalized firewood, specially related to the performance of the ceramic industry in the São Miguel do Guamá county and other industrial segments, pints to a possible shortage of these energy resources. Thus, initiative is needed to search for alternative fuels that are capable of not only ensuring the energy supply necessary for the current and future ceramic production of these industries, but also to ensure the continuation and conservation of renewable natural resources in the region. This work consolidates research among member companies of the Association of Ceramics Industries of São Miguel do Guamá, which are located in this municipality, using as a sample the ceramic companies seeking alternative bioenergy, along with the research among the agro-industries and farmers present in other municipalities of the state of Pará. The objective is to identify alternatives for energy supply in ceramic kilns, considering the use of renewable energy sources and opportunities for reducing the cost of its acquisition through the practice of return shipping. It was used as a research strategy case study in five moments of semi-structured interviews guided by questionnaires. The results obtained indicate that there is opportunity to supply biomass matched with the needs of the surveyed ceramic companies, with the potential to meet repressed energy demands and allowing the continuation of strategic business in Pará, as at this time, the growing civil construction industry.
Acesso aberto (Open Access)
Análise da vida útil e o custo de reparo de fachadas de edificações verticais
(Universidade Federal do Pará, 2020-02-28) VELOSO, Thiago Pinheiro; MAUÉS, Luiz Maurício Furtado; http://lattes.cnpq.br/7497951647889934; https://orcid.org/0000-0002-1762-8617
The façades of buildings have frequently presented levels of degradation higher than desired in recent years, exposing problems related to quality and durability, characterized by premature aging due, above all, to the appearance of pathological manifestation. Such complications cause several problems, affecting use, aesthetics, safety, and above all the durability of the buildings. With the advent of the Performance Standard (ABNT, 2013), it was possible to create durability parameters for all elements of a building, from the definition of durability terms in three levels: minimum, medium and maximum. In this sense, we sought to evaluate the usefull life of vertical building facades, as well as the frequency with which intervention occurs is them, the cost of repair, as well as a simulation was performed in the software “simulates v 4.4”. From the data collection with the application of a form in a company of great representation in the sector of façade repair, it was possible to account for 40 buildings with signs of dregacy. These buildings were divided into two groups taking into account the intervention time after delivery, that is, a group comprised between 1 and 7 years and another group between 8 and 15 years. With the adoption of the “simula v 4.4” software, based on the Monte Carlo method, cost and time simulations were carried out, aiming to determine the number of interventions required to manintain these facades, as well as the cost for such, in a cycle of 50 years. The results presented show that Group I had a lower performance than Group II in both situations, requiring more repair actions and a higher execution value, considering a minimum, medium and maximum reference generated by the program. In addition, the figures obtained show that both groups are below the minimum durability term recommended by the standard, which is 20 years, beyond the average and maximum terms, which are 25 and 30 years respectively, confirming the presence of a series of factors that interfered in the process of design and execution of the these facades. Thus, it is concluded that special attention should be given in the assembly of the facades of the buildings, as they are a very expensive component of the work, and that add a lot of value to the final product.
Acesso aberto (Open Access)
Análise do desenvolvimento de competências gerenciais na construção civil através do modelo da aprendizagem baseada em problemas adaptado ao contexto organizacional
(Universidade Federal do Pará, 2013-01-11) MARTINS, Vitor William Batista; NEVES, Renato Martins das; http://lattes.cnpq.br/6538317425557058; MACEDO, Alcebíades Negrão; http://lattes.cnpq.br/8313864897400179
With the growing and changing competitiveness in the construction business, the speed at which new technologies have been made available, the quantity and quick access to information featuring a turbulent environment that requires a great capacity of adaptation and learning in organizations. These changes within the civil engineering and consequently the production management of works, require an engineer with a different profile of the player works. Given this scenario, some changes have occurred, causing changes in this new professional profile of civil engineers. This new situation requires a more accurate profile of such professionals, where the domain of innovation, customer focus, planning, knowledge management system quality, sustainability and a humanist vision become indispensable parts. The research focuses on the analysis of study skills development civil engineer manager work. The main objective of the survey was: to analyze, understand and evaluate the results of the development of managerial skills of civil engineers managers work through deployment in a construction company on the model of Problem Based Learning adapted to the organizational context. The research strategy adopted was to action research because it relied on the teamwork and commitment of all involved change. The results achieved have analyzed the development of skills related to the organizational context, learning individual, collective and organizational, as well as, point out problems and possible solutions in business management.
Acesso aberto (Open Access)
Análise espaço temporal das barragens no estado do Pará nos últimos 20 anos
(Universidade Federal do Pará, 2020-08-08) CHAVES, Daniel Rodrigues; ISHIHARA, Júnior Hiroyuki; http://lattes.cnpq.br/3498874642887006; https://orcid.org/0000-0002-0081-7913
Knowledge of the location of reservoirs of water bodies is extremely important for the study and management of water resources. However, the registration of such information is mandatory for large dams, however, it is performed in a purely informative manner by most entrepreneurs, and it is up to them to correctly inform the data or simply ignore its importance. The cost of on-site registration is high, in addition to taking a long time on the part of environmental agencies such as ANA, ANM, SEMAS. In this sense, orbital images can offer maps of buslocations at low cost, covering large areas, including difficult to access. The present work has as main objective to perform a temporal space analysis through the MNDWI index, with the objective of subsidizing the registration and location of the buses in the state of Pará, which have an area of water depth greater than 3,600m², using for this purpose , 192 imagesof the Landsat sensor that cover the entire state territory. The results obtained showed a significant increase of 656% in the total number of dams in the last 20 years, mainly in the eastern region of the State. Having identified 3,704 dams in the State of Pará, however, only a total of 314 are registered on the ANA website, throughout the State. It was also identified the relationship between the largest cattle and soybean producing cities as the cities with the highest number of buses. It can be concluded that the method used proved to be efficient, since it managed to efficiently characterize the evolution of the dams over time, as well as their distribution and spatial variation, thus being able to assist in the planning of the inspection bodies in the identification of the most critical sites that need to be inspected, thus making inspection more effective and allowing better management of water resources.
Acesso aberto (Open Access)
Análise experimental da eficiência das fibras de aço no reforço ao cisalhamento de vigas em concreto armado
(Universidade Federal do Pará, 2016-08-29) GOMES, Lana Daniele dos Santos; MORAES NETO, Bernardo Nunes de; OLIVEIRA, Dênio Ramam Carvalho de; http://lattes.cnpq.br/1324105476558186
The present study aims to assess the efficiency of steel fibres for shear strength of reinforced concrete beams. For this purpose, some design guidelines were discussed together with an experimental research. For the guidelines analysis, five proposals are presented, RILEM TC 162-TDF (2003), CECS 38 (2004), JSCE (2008), EHE 08 (2010) and MODEL CODE (2010). Within this analysis, the proposals performance were assess from the Vexp/Vteo parameter, which corresponds, respectively, the experimental results, which will be collected from the scientific literature, composing a database (DB), and the theoretical results, which are estimated according to the design guidelines. For the experimental research, four beams are evaluated, where one beam is the reference one (no fibres), and the others are built with steel fibres reinforced concrete (SFRC). It is important to note that all beams are reinforced for shear strength by a minimum amount of web reinforcement (stirrups). For the SFRC beams, two conditions will be discussed. Firstly, the influence of the fiber content (Cf) added to the concrete, which range in 0,5% (≈40 kg/m3), 0,8% (≈60 kg/m3) and 1,0% (≈80 kg/m3) and finally, the possibility to replace conventional web reinforcement (stirrups) by steel fibres reinforcement. The theoretical analysis, it was concluded that the guidelines MODEL CODE (2010), CECS 38 (2004) and JSCE (2008), have provided the best results agreed with Vexp / Vteo≈1,0, however, JSCE (2008) was the most penalized according to the modified version of the DPC (Demerit Points Classification), proposed originally by Collins (2001). RILEM TC 162-TDF (2003) behaved conservatively and EHE 08 (2010) showed more dispersed results. In relation to experimental research, although it was recorded a resistance increases of 20% for concrete with Cf = 1.0%, the axial compression tests, however, the most significant gain was recorded as ductility and toughness the SFRC, to the point of changing the way of breaking the beams, shear (reference beam) for bending (beams with SFRC).
Acesso aberto (Open Access)
Análise termoelástica experimental e computacional por elementos finitos da parede externa em concreto armado de um forno de cozimento de anodo
(Universidade Federal do Pará, 2004-12-16) TEIXEIRA, Marcelo Rassy; SOUZA, Remo Magalhães de; http://lattes.cnpq.br/1995895693959225
This thesis presents a study about the behavior of a reinforced concrete structure subjected to high thermal variations. The structure under investigation is the external wall of an anode furnace used in Aluminum production, and is subjected to thermal variations in the range of 125C (2282 F) due to the furnace operation. The main motivations for the study were the presence of large deformations and occurrence of cracks in the structure, which could cause the furnace to become inoperable. The objective of the research was to investigate the causes of these structural pathologies, as well as to establish retrofit proposals for the structure. For this purpose, experimental and numerical studies were carried out. At first, the structure was monitored using displacement transducers and temperature sensors (thermocouples) connected to a data acquisition system, which could automatically obtain and store samples along the test period. Next, computer models were developed, using a multiphysics Finite Element Code called Algor, for the evaluation of temperature distribution and corresponding thermal stresses and strains in the structure. In these studies, stationary and transient heat conduction analyses were performed, followed by thermal stress analyses. As a conclusion of this research, it can be stated that the proposed methodology, based on advanced tools of structural engineering, was very suitable for the study of the presented phenomenon, since it rendered a precise and economic solution for the problem.
Acesso aberto (Open Access)
Avaliação da satisfação de usuários de imóveis residenciais: uma comparação entre incorporação pública e privada em Belém
(Universidade Federal do Pará, 2003-06-20) CARDOSO, Gustavo Duarte; LIMA, José Júlio Ferreira; http://lattes.cnpq.br/5176390429456548
This dissertation evaluates and analyses the level of satisfaction of users in residential developments relating to the production and the use of buildings taking into consideration the correlation between the product and socio-economic profiles of residents, as well as patterns of residential mobility process and attributes which determine decision taking by users when choosing new housing. It presents the results of field work based on research designed with references to the âMethod of Evaluation of the Level of Satisfaction of Residential Estates Clientsâ proposed by Jobim (1997) and to Post Occupancy Evaluation techniques, applied in two housing development companies, one public and another private, both involved in qualification programs. The survey consisted of interviews with directors of both companies, the application of questionnaires and interviews with owners of apartments of a development built by the private company and two others built by public company. These methods were used in order to guide the assessment of satisfaction of a) attendance services provided by the companies; b) the quality of the building and, c) the quality of residential units. As results it was found that there was a reduction in the number of unsatisfactory items in relation of the most recent development built by the public company in relation to oldest, however, with more advantage when compared to the private company case because of factors related to users expectations found in the field work.
Acesso aberto (Open Access)
Caracterização dos agregados da região do baixo Amazonas: elaboração de traços para a produção de blocos de concreto estrutural
(Universidade Federal do Pará, 2015-07-03) NEVES, Paulo Henrique Lobo; MACEDO, Alcebíades Negrão; http://lattes.cnpq.br/8313864897400179
With the growing demand for aggregates for the construction industry in the city of Santarém and surrounding cities, and with the emergence of construction processes still little known in the region, such as the use of concrete blocks, the need to develop an experimental research for verification arises insusceptible of the characteristics of aggregates to be used in order to study the feasibility of applying them to the production of concrete blocks with structural function, class B – 4,0MPa ≤ fbk <8.00 MPa. A complete characterization, identification of exploration areas with their distances to block production sites in the city Santarém was approached. With the results were developed traits with the dry mixture of aggregates depending on their characteristics seeking to optimize and better compactness thereof, to more economic traits and which give the final product a better finish and resistance. The experiment was developed from a standard feature used in the city's factories and which served as a benchmark for the other elaborate experimental features, complying with the steps below. In the first stage was carried out to identify the aggregate producing sources in the city of Santarém and surrounding areas. Following a second stage, held expeditions collecting and packaging the samples. For the latest steps were carried out the characterization tests being: Kids grain size and coarse aggregates, mass determination and specifies apparent, fine materials and abrasion Los Angeles. Later traces were designed with optimized framework in the ideal particle size range, with the production of concrete blocks with structural function of families 14x29 and 14x39. In the last step tests were performed to verify the dimensional analysis, absorption index and resistance to compression individual blocks. Prior knowledge of the aggregates and framed adequate mixing in the ideal particle size range provided the reduction in the consumption of cement and favored the final product quality improving all its performance parameters.
Acesso aberto (Open Access)
Competências necessárias para atuação do arquiteto como coordenador do processo de projeto de edificações (Estudo de caso)
(Universidade Federal do Pará, 2011-09-13) LIMA, Paulo Gesson Mendes; NEVES, Renato Martins das; http://lattes.cnpq.br/6538317425557058
The present study sought to identify the skills required in the process of formation of the Architect, during graduation, having focused on his acting as coordinator of the building design process. The survey used a qualitative methodology with exploratory and descriptive approach, involving data collection through survey. Data were analysed as: resolutions of the MEC and CONFEA/CREA, curricular of the faculties of architecture and urbanism of the metropolitan region of Belém-PA and the perception of students and architects (teachers and professionals) through interviews, having as main result a curriculum proposal for recasting in the formation of the architect and urban planner by including expertise on coordination of the building design process order to meet the needs of professional working in the field. The main result was a proposal for the development of skills that tries to work through knowledge, skills and attitudes related to content, learning experiences and forms of assessment, the best way to effectively contribute to the formation of an architect and urban planner in order to enable these professionals can act as coordinator of the process of building design.
Acesso aberto (Open Access)
Compressão tempo-custo paramétrica ótima de projetos de construção civil
(Universidade Federal do Pará, 2012-08-30) BENTES, Jayme; ICHIHARA, Jorge de Araújo; http://lattes.cnpq.br/5726366418302065
One of the issues of the Civil Construction Industry is around the planning phase of the the project, when is possible to verify the difficulty in completing the project in time, initially, thinking as the contractor. Therefore, the present study proposes the application of the linear programming method as a solution to the problem of the optimization of the factors time and costs from the Civil Construction projects. Initially it was done, by bibliographic mapping, also as the re-reading of some basic concepts, programming Technics with network and critical path. Afterword, it was discussed definitions of operational research and mathematical models of Linear Programming. It was proposed, therefore, a method aiming the solution of the issue of the time optimization and projects expenses of Civil Construction. To demonstrate the application of the proposed method, it was used as a scenario, a governmental construction project, that the goal was the compression of the project in 14 days, reaching a period of contract, a cost of compression the amount of R$ 95,040.15 (ninety five thousand forty dollars and fifteen cents), less than if there were an increase in penalty for delay. With this achieved our objective, compression project for the desired duration.
Acesso aberto (Open Access)
Desenvolvimento de sistema computacional integrado de dimensionamento e representação gráfica de canais de macrodrenagem
(Universidade Federal do Pará, 2022-05-23) MARTINS, Vania Carla Dias; PEREIRA, José Almir Rodrigues; http://lattes.cnpq.br/9918600634569244; https://orcid.org/0000-0002-3144-1787
Develops an integrated computer system for the design and graphic representation of macrodrainage channels, including the hydrological, hydraulic, hydrodynamic design steps and graphic design elements. The system conceived and named SIDCAM was developed with a central model built in Java (MACRO 1.0), which is integrated with three external software, Google Earth, HEC-RAS and AutoCAD. For this, the research was carried out in three stages: (1) identification of methods and software, necessary for the development of a macrodrainage project; (2) development of the software in Java, for the hydrological and hydraulic design stages (phase 1), and, development of tools for integration, import and export of data, between the hydraulic module and the HEC-RAS and AutoCAD software (3 ) evaluation of the functionality and reliability of SIDCAM, through its application in the case study of the macrodrainage project of Tucunduba, Belém/PA. SIDCAM is composed of four modules: the hydrological module, for the generation of hyetograms and project hydrographs, using the alternating blocks and triangular hydrograph (SCS) methods; the hydraulic module, for making the geometric design of the channel and the coincidence of flow peaks with high tide peaks; the hydrodynamic module, to validate the SIDCAM geometric design; and the graphic module, for the automatic production of editable graphic pieces, of longitudinal and transverse profiles. In addition to the modules, import directories of IDF and tide gauge curves were built, fed by two databases, for IDF coefficients of 165 Brazilian municipalities and tide gauge curves of 334 stations of the Brazilian Navy. In the analysis of the water levels in the channel, simulated by the developed system, most of the results were classified as “Good” and “Very Good”, with Nash-Sutcliffe coefficients greater than 0.97, a minimum percentage error of 1.19% and a maximum of 14.72%. In view of these results, the proposed tool is promising, especially because it is a model that concentrates a good part of the processes necessary for a macrodrainage project, in a single integrated structure, thus filling gaps left by current models, which have a dissociative approach to the different stages of the project.
Acesso aberto (Open Access)
Diretrizes técnicas e legais para locação de limites edificados em praias
(Universidade Federal do Pará, 2009-07-16) NASCIMENTO, Flávio Campos do; LIMA, José Júlio Ferreira; http://lattes.cnpq.br/5176390429456548
The guidelines for leasing built limits built in beaches borders are important in projects of urban intervention, once, the contention wall has a fundamental role as a limit for urbanization. Contention walls also have the function of to minimizing the effects of erosion and flood in urban areas and to do the support of the necessary embankment for the consolidation of the road system. Drawing from a case study of Praia do Amor (Outeiro, Pará, Brazil), where a design project was completed in 2005, guidelines for the correct positioning of the contention wall in borders of beaches were suggested: i) when defining the limits for intervention, to clearly establish boundaries through photographic, ordnance and topography surveys; ii) assess social, economic and infrastructure demands for an accurate definition of the kind of work to be conducted; iii) assess a diagnosis of buildings information such as shape, occupation, landscape and tenure conditions; iv) conduct climate, hydrologic and ocean conditions for a survey of beach environmental conditions for predicting future impacts on the structure to be built; v) locate the contention wall leaving 50m from the protected area in order to keep built structures away form corrosion; iv) in cases which the limits are already occupied by buildings without possibilities for rearrangement, assess contention wall in order to support the effects of waves and currents to avoid collapses and human and material losses in the area.
Acesso aberto (Open Access)
Efeito da adição de agregados reciclados na resistência ao cisalhamento de vigas de concreto armado
(Universidade Federal do Pará, 2018-07-31) CARDOSO, Allan Carvalho; FERREIRA, Maurício de Pina; http://lattes.cnpq.br/4242041552985485
The present work evaluates the influence of the incorporation of recycled concrete aggregate (RCA) on the shear strength of beams in reinforced concrete. An experimental analysis composed of twelve beams will be performed: four executed with conventional concrete (composed of natural aggregates) and eight with RAC. The experiment aims to evaluate the influence of the transverse reinforcement (ρw) and the variation of the longitudinal reinforcement ratio (ρl), on the shear strength of the parts. The concrete beams were divided into two groups, with RCA rates varying from 0 to 100%. In addition, three codes will be discussed: ACI 318 (2014); EUROCODE 2 (2004); NBR 6118 (2014) and MODEL CODE (2010), which will be applied to a concrete beams database (DB) with RCA. The performance of these codes will be evaluated through the parameter λ, by means of the relation between the ultimate experimental load (Vexp) and the theoretical ultimate load (Vteo), λ = Vexp / Vteo. This parameter was analyzed according to the level of conservatism and related to the main variables of this research: ρl, ρw and AGRC. The value of λ is analyzed according to the level of conservatism.
Acesso aberto (Open Access)
Efeito da substituição parcial do agregado graúdo por escória de alto-forno nas propriedades mecânicas de concretos
(Universidade Federal do Pará, 2016-04-08) VASCONCELOS, Adriano Luiz Roma; PICANÇO, Marcelo de Souza; http://lattes.cnpq.br/4535052395600357
The blast furnace slag charcoal is waste generated from the production of pig iron in blast furnaces. In the steel mills operating in blast furnace waste generation is approximately 250 kg per ton of pig iron produced. In this sense, the state of Pará figure as the second largest domestic producer of pig iron, reinforcing the importance of having a more detailed scientific research in order to minimize the environmental impact caused by the accumulation of this waste through the development of appropriate applications. In this context the present research aims to determine the mechanical properties of concrete produced with the partial replacement of natural coarse aggregate (AGN) for blast furnace slag (EAF). For this we performed a beneficiation process of the EAF by crushing in a jaw crusher and screening, then it performed a dose of study concrete with 100% AGN was performed immediately replacing (by mass) of natural aggregate by aggregate of blast furnace slag (0% - reference, 20%, 30% and 40%). tests were carried out in the fresh state (consistency) and in the hardened state (compressive strength, tensile strength and modulus of elasticity) of concrete produced with partial replacement of AGN by EAF at the ages of 28 and 63 days as well as scanning electron microstructure (SEM) of concrete. The results showed that the incorporation of the EAF in the mixture caused a gradual decrease in concrete workability. As well as the mechanical performance increased significantly compared to conventional concrete from the incorporation of 30% of EAF. Thus, incorporation of this waste in special concrete production improvements induced responses in all the analyzed mechanical properties when compared to conventional concrete.
Acesso aberto (Open Access)
Estratégia de competição empresarial na construção civil paraense da Copala Industrias Reunidas S/A
(Universidade Federal do Pará, 2004-09-01) RUFFEIL JUNIOR, Simão Massud; ICHIHARA, Jorge de Araújo; http://lattes.cnpq.br/5726366418302065
This dissertation is based on the analysis of competitive strategy adopted in the market of iron bar for civil construction in Belém, capital of Pará, by COPALA INDUSTRIAS REUNIDAS S/A. So, there is interest in evaluate the possibilities of the company in the sense o f staying actuating with success in the sector, in which weighs the contestant carried out by metallurgies of great deportment, of which interests are from national and international encompassing. Search were realized considering the steel market of de civil construction of an ample way, being consulted constructors, businessmen and consumers of that material. Like wise, the proper COPALA was object of evaluation as well as acquirer of raw material to the steel manufacture, as how producer and seller of the product .
Acesso aberto (Open Access)
Ferramenta para mensuração da capacidade tecnológica no segmento de construção de edifícios
(Universidade Federal do Pará, 2022-08-17) SILVA, Horácio Lima da; ISHIHARA, Júnior Hiroyuki; http://lattes.cnpq.br/3498874642887006; https://orcid.org/0000-0002-0081-7913
Technological innovation is essential to enhance the performance of industrial organizations with a view to acquiring competitive advantage, as it adds improvements in products, processes and services. Currently, Industry 4.0 is the most modern synthesis of the accumulation of innovations, representing a new era of industrial production. Despite its importance, civil construction is not yet fully inserted in this new industrial context, especially when considering underdeveloped countries. The building construction subsector, for example, is predominantly characterized by a low technological level when compared to other industries. In this sense, it is extremely important to develop studies that establish an understanding of the aspects that lead to this scenario of low technological level in civil construction. Therefore, this work was based on the theory of accumulation of technological capabilities to develop a tool, called in this work FMCTEED (Tool for Measuring Technological Capability in Building Companies), aiming to trace the technological profile of building construction companies and understand the aspects that need to be enhanced in these organizations to overcome the technological backwardness. This dissertation used bibliographic research, interviews with experts and mathematical modeling as a methodology to build a tool capable of expressing the accumulation of technological capacity in companies in the buildings subsector. In a second step, the model was applied to companies in the buildings subsector to analyze the performance of the tool. As a result, the study showed that the companies object of the study practically do not have ST&I development mechanisms; in addition, the survey revealed a huge gap in industrialization and robotization of processes; there was also a weakness in terms of a collaborative network that includes universities and research centers for the production of technologies that can be incorporated into the production process. Finally, it can be said that FMCTEED was successful in establishing the technological profile of the companies studied and in listing critical points for intervention with a view, for example, to the implementation of innovations.
Acesso aberto (Open Access)
Fibra de curauá como reforço em matriz cimentícia para fabricação de telhas e placas de fibrocimento
(Universidade Federal do Pará, 2015-11-03) SALES, Cintia Gama; PICANÇO, Marcelo de Souza; http://lattes.cnpq.br/4535052395600357
Natural fibers such as reinforcing fragile matrices based on cementitious materials, have attracted great interest in developing countries, because of its low cost, availability, energy saving. The use of composites in plates, roof tiles and prefabricated components, can make a significant contribution to the rapid growth of infrastructure in developing countries. Among the natural fibers, curauá fiber, Ananas erectifolius, has gained prominence because of its high tensile strength. The main objective of this work is the use of curauá fiber as reinforcement matrix with Portland cement, for use in structural elements such as slabs and tiles. For this study, testing and compression modulus of elasticity in mixtures with a volume fraction of 1% and 2.5% and fiber length of 1 cm and 2 cm, and full mortar without fibers were performed. The mixture showed the best results in terms of workability, was the volumetric fraction of 1% and 1 cm fiber length, was chosen for the manufacture of cement tiles and plates. For the evaluation of composites was conducted tensile strength test in bending the plates and tiles with curauá fibers and no fibers, for comparison. The results confirmed the influence of the fibers on the composite deformation capacity increasing by 46% the tensile strength in plate bending with curauá fiber relative to the plate without fiber, and increased tile breaking load of 49% with respect to tile without fiber.
Acesso aberto (Open Access)
Gestão de resíduos da construção civil: um estudo de caso em Tucuruí-PA
(Universidade Federal do Pará, 2022-11-17) SOUSA, Fernanda dos Santos; CORDEIRO, Luciana de Nazaré Pinheiro; http://lattes.cnpq.br/9126233381230999; https://orcid.org/0000-0001-7931-4042; TEIXEIRA, Marcelo Rassy; http://lattes.cnpq.br/8912916360456192
The Civil Construction Industry (CCI) is guilty of impacts on the environment being one of the main sources of pollution today, especially with regard to the generation and disposal of waste in urban centres, this research was developed to diagnose and propose improvements in the management of Construction and Civil Construction Waste (CCW) in a small town, the case study was conducted in the city of Tucuruí-PA, a hub city in the Amazon region. To this end an investigation was conducted through online questionnaires with questions about management and management of CCW and was also performed identification of Irregular Disposal Points (IDP) through georeferencing using the Global Positioning System (GPS) and Qgis 3.16.6 software. After the analysis, we sought to suggest what would be the best improvement strategies for the management of waste from civil construction, through the current diagnosis of the management of CCW in the city. Through this research it was possible to perceive the most relevant points of management difficulty on the part of the Tucuruí Municipal Government (PMT), which are: absence of specific legislation for CCW, lack of environmental education on the subject, absence of supervision, in addition to the lack of management carried out by construction companies operating on construction sites, it was also possible to locate the IDPs and know the destination given to the CCW, in a market practically non-existent and without stimulus. The analyses contained in this diagnosis of the current situation of Civil Construction Waste management will enable actions to be recommended to improve it through public policies in the municipality of Tucuruí-PA, as well as in the region.
Acesso aberto (Open Access)
Gestão dos resíduos de construção civil procedentes de pequenas construções no Município de Belém- Pa
(Universidade Federal do Pará, 2019-02-26) LEITE, João Alex Garcia; PICANÇO, Marcelo de Souza; http://lattes.cnpq.br/4535052395600357; https://orcid.org/0000-0001-7313-1229
The construction industry is one of the most important sectors to the economic development of Brazil. However, it also causes some of the greatest environmental impacts mainly due to the improper disposal of construction waste (CW) in natural areas and large urban centers. The issue of CW in Belém includes the problematic due to the absence of the Municipal Construction Waste Management Plan (PMGRCC). Of particular note is the daily construction waste generated and improperly disposed of by small companies and individuals, which is very common in Belém. The main objective of this dissertation is to study the current CW management system for small companies and individuals, with the purpose of improving the treatment processes for CW improperly disposed of by small-scale construction sites in the city of Belém. The specific aims include: identification of those involved in the generation, transportation, and final disposal of CW. The research is based on an exploratory, explanatory, qualitative approach and will be restricted to the Municipality of Belém. It will involve field visits to take photographic records, interviews with those involved in the process, and analysis of data from the Municipal Sanitation Department (SESAN) and the Municipal Solid Waste Department (DRES). It is hoped that the results of this research will help facilitate the introduction of an efficient management process for the control, handling, and final disposal of CW in Belém.