O modal rodoviário atualmente, é o mais utilizado no Brasil, seja este para transporte de cargas e ou de passageiros. Visto isso, a busca por infraestruturas de transportes que exerçam desempenho e segurança ao tráfego, passa a ser uma necessidade primordial no momento de dimensionar novas estruturas de pavimentos. Sendo assim ao se fazer um breve paradoxo histórico, nota se que os pavimentos dimensionados no país, muitas das vezes não chegam na sua vida útil de projeto, tendo como defeitos mais recorrentes o trincamento por fadiga e deformação permanente, o que gera em um maior número de ações M&R, ou seja intevenções de manutenção e reabilitação, ocasionando consequentemente em um alto volume de material fresado, que é destinado aos bota-foras. Com intuito da melhor utilização e destino final adequado dos resíduos oriundos da fresagem, buscou se realizar distintas incorporações de material fresado à novas misturas asfálticas, com foco na fadiga, visto que o material apresenta uma elevada rigidez. Entretanto buscou se fazer misturas com 100% de incorporação, além de percentuais de 25% e 45%, avaliando até que quantidade incorporada proporciona ganhos e não comprometa a vida de fadiga da mistura asfáltica.
Nowadays, globalization has become essential, and interconnection between people and cargo has become necessary due to international trade and investment. In this context, aviation is an important modal because of its efficiency in security, range, and speed; however, the aerodrome infrastructure capacity is not always sized according to the demand and safety regulations required during operations. The number of runway occurrences in Brazil increased considerably since 2011. These occurrences are consequences of several contributing factors, of which runway conditions and airport infrastructure can be considered the most important; however, the quality of runways and the flight safety they provide can't be quantified through direct statistics. Adhering to a high standard of airfield quality while also knowing airport infrastructure, a study that applies an evaluation of the Pavement Condition Index (PCI) methodology has been developed. First, the airfield pavement at a military base was analyzed and later compared to the results found in a civil airfield study done by another author. The methods used to identify distress in the pavement's surface were based on ASTM D 5340-12, as are PCI calculations. Secondly, the system was infused into PAVEAIR-FAA (Federal Aviation Administration) to apply an airport management method at a military base to compare the results obtained by other authors for a civil airfield study, where it was intended to analyze the performance characteristics of the runway for each type use. Subsequently, one can obtain subsidies of decisions for the optimization of resources used in airfield maintenance and rehabilitation, and increase operational safety.
The Brazilian law N° 12.587/12 on urban mobility, currently in effect, aims to ensure the improvement of accessibility, and the trafficability of people and cargo in cities, as well as integrate transport modes, and study mechanisms for infrastructure management. Cities with a population of more than 20,000 had to create their urban mobility plans, according to the requirements of the Ministry of the City. The objective of the plan is to conceive projects that aim to mitigate operational and functional problems in the transportation network within the municipalities. One of these cities that is creating a mobility plan is Anápolis-GO, where its plan includes the implementation of bus lanes on the main avenues of the municipality. In these corridors, there was the substitution of the flexible pavement by slabs of PCC (Portland cement concrete), at the boarding and alighting points, due to the sudden braking events and occasional acceleration. Given this scenario, the study aimed to analyze the stopping distance at these locations, as a function of road speed and braking rate, to assess whether the length of these slabs would be sufficient to what was proposed. In addition, it was sought to monitor the pavement against the performance of the PCC slabs, given the incident loads of braking and acceleration, as well as the performance of the flexible pavement, predicting the possible consequences and/or pathologies that may occur due to the operation, since the existing traffic in the corridors should be compatible with that of a high-speed road.
The paving technique ensures the guarantee of functional traffic conditions, optimizing the performance of the structure in providing travel with comfort and safety. Considering that due to time and the action of traffic, when the pavement reaches the end of its useful life, interventions are necessary, aiming at a gain in serviceability, comprised of the thinning of the coating, generating waste, for later execution of a new layer, which can be recycled. This recurrent technique for road pavements has been widely applied to the use of RAP (reclaimed asphalt pavement), to compose new layers of pavement, given its mechanical performance, especially in terms of permanent deformation, and given the sustainable and economical premise. The paper sought to evaluate, using a laboratory study, the mechanical performance of hot recycled asphalt mixtures with the incorporation of 25%, 45%, and 100% of RAP, and to perform an economic analysis of the applicability of the technique. The dosage methodology occurred according to the Superpave specification whose results listed a significant gain in stiffness, and good mechanical performance with proportionality in the values obtained according to the incorporation rate of RAP. As for the economic analysis, it was observed that the costs of applicability of the technique are related to the percentage of incorporation in mass and the logistical costs of processing, which may be lower than or higher than that of a conventional mixture. Above all, the results were satisfactory to prove the feasibility of the technique in paving works.
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