Análise do comportamento mecânico de misturas asfálticas recicladas modificadas com a adição de óleo vegetal residual

Torres, Paulo Roberto Barreto; Lucena, Lêda Christiane de Figueiredo Lopes; Sousa, Talita Miranda de; Krau, Marcela Maria Toscano; Luz, Priscila Maria Sousa Gonçalves; Barbosa, Lucas Ferreira de Lima

doi:10.14295/transportes.v30i1.2585

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…Proving the nobility of RAP by itself, there are also performance analyses regarding the mechanical behavior of recycled asphalt mixtures, with modification of the binder, aiming even more economy and sustainable practice in the manufacture of asphalt mixtures, replacing conventional binders, modified binders, and rejuvenating agents, with waste vegetable oils and bioligands [28].…”

Section: Dosing Studymentioning

confidence: 99%

“…However, through all the benefits in the applicability of the recycling technique, with advantages in the reduction of transportation costs, conservation of remnant materials, preservation of the geometry of the existing pavement, maintenance of drainage conditions, less impact on the environment, energy conservation Among the percentages mentioned in the literature and the ones used in the industry, they vary a lot, from mixtures with 20% to 100% of incorporation [2,14,[26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Hot recycled asphalt mixtures with the incorporation of milled material: analysis of the mechanical performance and economic presumption in the applicability of the technique

Oliveira

Farias

2022

Matéria (Rio J.)

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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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Section: Dosing Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hot recycled asphalt mixtures with the incorporation of milled material: analysis of the mechanical performance and economic presumption in the applicability of the technique

Oliveira

Farias

2022

Matéria (Rio J.)

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Determinação da ativação relativa do ligante RAP e avaliação da interferência de aditivos de reciclagem em misturas asfálticas produzidas com 100% RAP

Ferreira,

Macedo,

Lucena

et al. 2023

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Uma das alternativas que segue a tendência da sustentabilidade é a reciclagem do material fresado, denominado Reclaimed Asphalt Pavement (RAP). Alguns métodos têm sido adotados no intuito de elevar a quantidade de RAP na composição das misturas asfálticas e restaurar as características originais do ligante envelhecido, com destaque para os aditivos de misturas mornas e os óleos de origem animal e vegetal. Esse estudo pretende quantificar o grau relativo de ativação do ligante RAP (DoA’) usando os valores de resistência à tração, módulo de resiliência e volume de vazios de misturas confeccionadas com 100% RAP. Objetiva também avaliar a interferência do uso de dois aditivos (zeólita natural clinoptilolita e óleo de algodão) em diferentes teores e condições de temperatura de condicionamento, nas propriedades de resistência à tração (RT), módulo de resiliência (MR) e no parâmetro volumétricos de volume de vazios (Vv) de misturas asfálticas com taxa de reciclagem de 100%. Os resultados apontam que o ligante RAP apresentou 100% de ativação na temperatura de 140°C. No geral, em comparação com as amostras sem aditivo, o óleo de algodão apresentou potencial de reduzir a RT, o MR e o Vv em todas as condições de temperatura avaliadas, e identificou-se que a variável “teor de óleo” é aquela que implica em variações estatisticamente significativas desses parâmetros. O uso da zeólita não demonstrou ter influência significativa na RT e MR considerando as variáveis “teor de zeólita”, “temperatura” e “tempo de condicionamento”. Entretanto, observou-se que a temperatura de 160°C aparentou ser mais eficiente na redução do volume de vazios das amostras com zeólita.

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Análise do comportamento mecânico de misturas asfálticas recicladas modificadas com a adição de óleo vegetal residual

Cited by 2 publications

References 11 publications

Hot recycled asphalt mixtures with the incorporation of milled material: analysis of the mechanical performance and economic presumption in the applicability of the technique

Hot recycled asphalt mixtures with the incorporation of milled material: analysis of the mechanical performance and economic presumption in the applicability of the technique

Determinação da ativação relativa do ligante RAP e avaliação da interferência de aditivos de reciclagem em misturas asfálticas produzidas com 100% RAP

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