Even though we know that the construction industry is constantly evolving, due to the emergence of construction techniques and materials, we note that there are still challenges to be faced: pathological manifestations. These, in turn, compromise the performance and useful life of the elements. Its occurrences are mainly due to the reduction of deadlines, inadequate design solutions, improper use of materials, unskilled labor, lack of maintenance, lack of inspection, among other aspects. The evaluation of a structural element is based on the precedence of guaranteeing durability and quality to ensure the integrity of users. Therefore, this article analyzed structural elements of a reinforced concrete bridge located in the city of Correntes-PE. The main objective of the work was to characterize the main pathological manifestations affecting the structural elements of the bridge. The process of characterization of degrading agents was carried out through non-destructive tests, such as the carbonation front, as provided for in EN 14630 (DIN, 2007) and the evaluation of surface resistance, through the sclerometry test, according to NBR 7584 (ABNT, 2012). The results allowed to characterize the strength of the concrete and the degree of degradation. Points with incidence of carbonation and exposed reinforcement were identified, denoting the need for preventive and corrective intervention, in order to prolong the useful life and performance of the evaluated artwork.
O desempenho térmico de uma edificação é um fator importante em habitações quando se preocupa em oferecer ao usuário o conforto térmico que o mesmo tem direito a ter. Uma edificação deve ser projetada para o clima em que ela está inserida para possuir um maior potencial em fornecer conforto térmico, e ainda economizar energia. Este trabalho teve como objetivo avaliar o desempenho térmico, segundo as diretrizes da norma brasileira de desempenho NBR 15575 de uma edificação unifamiliar localizada na cidade de Águas Belas-PE, Brasil. A avaliação do desempenho térmico foi realizada através de dois procedimentos presentes na NBR 15575: o procedimento simplificado e a simulação computacional. Como metodologia, foi realizada uma pesquisa exploratória e um estudo de caso. A avaliação através do método simplificado foi realizada pelo cálculo da transmitância térmica e capacidade térmica da envoltória da edificação, ou seja, das paredes de fachada e da cobertura. A simulação computacional foi realizada a partir do programa EnergyPlus, que com informações climáticas e um modelo tridimensional da edificação foi capaz de ensaiar as condições climáticas sobre a edificação e determinar o comportamento térmico da mesma. Os resultados obtidos através da análise pelos dois procedimentos anteriormente citados foram comparados e analisados conforme exigências da NBR 15575, sendo notadas pequenas divergências entre eles. A simulação computacional se mostrou mais efetiva quando comparado ao procedimento simplificado.
Furos em elementos estruturais são alternativas de projeto para situações em que a compatibilização com outros sistemas se faz necessário. O problema surge quando furos são realizados em vigas que não foram inicialmente previstos na etapa de planejamento.
In view of the improvement of construction techniques and technological innovations, civil construction still faces numerous problems. Uncontrolled exploitation of natural resources has caused major environmental impacts, in addition to the generation and accumulation of debris in urban areas. Thus, recycling appears as a sustainable alternative to reduce the accumulation of this waste. As an option, there is the use of Recycled Aggregates, obtained through Construction and Demolition Waste (CDW). In this sense, the present study aimed to analyze the feasibility of using the CDW through its application in the production of recycled coarse aggregates in concrete. For the tests, the coarse aggregate was replaced in the proportions of 0 (reference line), 10, 20, 30, 40, 50 and 100%, with three samples for each line and age. The dosage of the strokes followed the parameters established by the IPT / EPUSP method. The concretes were analyzed for compressive strength at 7, 14 and 28 days and the samples were evaluated for properties in an anhydrous, fresh and hardened state. The data collected in the tests were tabulated and analyzed for the degree of addition and its correlation with the characteristic resistance. The results allowed to conclude that the use of the residue in the form of aggregate for the concrete, in the proportions of 10% and 20%, does not affect the compressive strength, making it a good alternative.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.