Navegando por Assunto "Construction industry"

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Acesso aberto (Open Access)
Bem-estar no trabalho: proposta de uma escala para operários da construção
(Universidade Federal do Pará, 2019-10-08) MOREIRA, Felipe de Sá; DUARTE, André Augusto Azevedo Montenegro; http://lattes.cnpq.br/1135221873341973
Well-being concepts, which are widespread in the social sciences, are gaining more space and are being worked on in several other areas. Two theories of approach are typically used: subjective well-being through hedonic theory and psychological well-being supported by eudaimonic theory. Based on these theories the field of study called well-being at work (WBW) was developed, which seeks to understand the factors that provide happiness or well-being in organizations. Despite the intensive use of labor, the construction industry does not seem to apply such knowledge, but develops many aspects of worker quality of life. Thus, the objective of this research is to propose a scale of WBW aimed at the workers in the construction industry. For this, the Item Response Theory (IRT) was used to design the instrument used in the scale. Through a Systematic Literature Review (RSL) conducted in 10 research bases, 92 studies were mapped that pointed out 89 aspects related to the welfare of this group of workers. Based on these aspects, several instruments already validated in other researches were sought to constitute the initial instrument of this study, which consists of 53 items related to the following themes: WBW, stress, work-family relationship, safety, alcohol and tobacco consumption, physical health and musculoskeletal disorders. The instrument was applied to 376 construction workers. The results were tabulated and IRT was applied using the Samejima model for gradual items. The final instrument is composed of 32 items, since 2 items had reduced factor loading (less than 0.30) and 19 items had low discriminatory power (below 0.65). The scale consists of 5 levels (-2, -1, 0, +1 and +2), classifying the individual according to their perception of the following aspects: WBW, stress, work-family relationship and physical health. This research is expected to contribute to the theoretical framework of WBW, as well as to the promotion of such perspectives in civil construction.
Acesso aberto (Open Access)
Reciclagem de resíduos industriais na fabricação de argamassas e placas cerâmicas premoldadas fabricadas a partir de matriz sílico-aluminosa destinadas a construção civil
(Universidade Federal do Pará, 2014-05) CARVALHO, Ronaldo Nonato Ferreira Marques de; MACÊDO, Alcebíades Negrão; http://lattes.cnpq.br/8313864897400179; SOUZA, José Antônio da Silva; http://lattes.cnpq.br/6157348947425968
It is proposed to manufacture plates in structured network of PVC pipes, filled with mortar composed of rejected materials of civil construction, and coal fly ash, hydrated lime and Portland cement, inspired by the traditional technique of earth construction called “taipa de mão”, employed in the State of Pará, Brazil. The final product is a contemporary and ecological construction system for the execution of partition panels, aiming the decrease and the reuse of waste construction’ materials, whose disposal causes environmental damage. The rejected materials have physical-chemical characteristics which allow its recycling, increasing the duration of their Life Cycle. Aiming to develop mortar’s material having characteristics as plasticity, elasticity and mechanical strength were made experiments with traces consisting of construction waste and Portland cement, duly processed and dosed for the confection of test bodies. These were submitted to the tests absorption of water, porosity, density, compressive strength and toughness, resulting in the selection of the most appropriate compound, in respect to use in manufacturing mountable ceramic plates for use in partition panels. The plates were submitted to the tests of compression and tension.