Navegando por Assunto "Pavimentos"

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Acesso aberto (Open Access)
Análise da manutenção de pavimentos urbanos: uma proposta de implantação de um sistema de gerência de pavimentos
(Universidade Federal do Pará, 2017-09-19) BARRA, Renata Brabo Mascarenhas; NEVES, Renato Martins das; http://lattes.cnpq.br/6538317425557058; MACEDO, Alcebíades Negrão; http://lattes.cnpq.br/8313864897400179
The absence of urban planning and management is the factor that most contributes to driving municipalities to a precarious stage of their infrastructure. The management of the maintenance of the urban pavements is important for a good management of the public services offered by a municipal body, being a great challenge to its managers. The development of an internal management system better incorporates the needs of the agency responsible for interventions in the road network, besides, it aims to generate economy and improve the quality of the services provided. The urban road network is one of the main components of the municipal infrastructure system, and yet the concern of public managers with the systematization of procedures for the management of this road system is small. In view of the above, this research has the objective of proposing the implementation of an Urban Pavement Management System to a public Road Works Department. As a research strategy, the case study was adopted, since a field research was carried out by means of the application of a structured questionnaire, analyzing in depth the research focus. In addition to the bibliographic review stage, the study comprised the execution of three phases, the first one referring to the presentation of the idea (motivation) and the initial diagnosis of the focus of the research, the second phase corresponded to the software development stage the elaboration Of the Urban Pavement Management System - SGPU and the third phase corresponded to the implementation and use of the developed system. The main results are: the creation of a computational tool capable of generating an inventory of the municipal road network, generating support reports for decision making considering the type of existing pavement, type of last maintenance done on the road, Services per neighborhood of the analyzed region, the condition of the subgrade and its drainage system, the type of roadway covering and its Pavement Condition Index. These reports provide senior management with the foundation needed to plan the short, medium and long term actions correctly, increasing efficiency and assertiveness in meeting the demands. Finally, it was concluded that the developed system met the general objective of the research, generating in a satisfactory way the inventory of the routes of the analyzed region, aggregating information for management decision-making in the organ, in addition, this research becomes important for the environment For its innovative character in the analyzed region, consolidating itself as one of the references regarding the management of maintenance of urban pavements in public agencies.
Acesso aberto (Open Access)
Avaliação do emprego de agregado miúdo reciclado na produção de peças pré-moldadas para pavimentação tipo “paver”
(Universidade Federal do Pará, 2021-02-05) VIEIRA, Marília de Oliveira; SOUZA, Paulo Sérgio Lima; http://lattes.cnpq.br/4933212993218783
Acesso aberto (Open Access)
Estudo da colmatação em concretos permeáveis para tráfego leve e de pedestres
(Universidade Federal do Pará, 2020-05-28) TEIXEIRA, Mísley da Cruz; CORDEIRO, Luciana de Nazaré Pinheiro; http://lattes.cnpq.br/9126233381230999; https://orcid.org/0000-0001-7931-4042
Permeable concrete is a material mostly used as paving coating to reduce the effects of surface sealing. The material’s susceptibility to clogging is considered as a disadvantage, and it became an object of study in research about this material, as this one which evaluated the effect of clogging on permeable concretes used as pavement coating to light traffic. To this end, an experimental program was elaborated to characterize the material, designed with different percentages of fine aggregate, and to evaluate the evolution of clogging in permeable. The specimens were submitted to characterization and permeability tests after deposition cycles of different types of sediments (sand and clay) and cleaning by aspiration. The results of fresh material characterization corroborated the common assertion in the academic community that the insertion of fine aggregate in mix compositions increases the unit mass and the mechanical strengths and reduces the void percentage and the permeability of the concretes. The clogging tests proved that larger particle size sediments (sand) caused a loss of permeability due to sealing of the upper layer of the specimen, with loss ratios up to 21,13% at the end of the 20th sedimentation cycle, while the smaller particle size sediments (clay) induce to a deeper clogging, with a permeability reduction varying of 8,45% to 16,46%. The maintenance efficiency was proven by total recovery of clogging by sand, and a recovery percentage of 96,85% to clogging by clay. These results make it possible to declare that any particle size can clog the material, but also it is easy to recover its permeability by maintaining/cleaning of the pavement, which confirms that the pavement lifespan and raining capacity are directly associated to its periodic cleaning.