Estudos laboratoriais para determinação do comportamento da vida de fadiga de misturas asfálticas rejuvenescidas

Silva, João Paulo Souza; Farias, Márcio Muniz de

doi:10.14295/transportes.v27i4.1869

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(2 citation statements)

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“…In this study, the rejuvenating agent type AR-5 (Ciclopav 100) was used in the mixtures, whose incorporation percentage was established at 20% of the weight due to the content of oxidized binder present in the RAP sample, based on studies [22], and to obtain an economy in the amount of virgin binder to be incorporated.…”

Section: Dosing Studymentioning

confidence: 99%

“…RAP is understood as the main residue resulting from the restoration services, and it is highlighted in the paving industry, the addition of this milled material as a component of new asphalt mixtures and granular layers as a granulometric stabilizer [2,14,[19][20][21]. Since each RAP sample consists of stone units (aggregate), covered by a mastic (filler and aged binder) forming lumps of the milled material [22], requiring in the dosage process that granulometric corrections are performed, and additions of rejuvenating agents and binders KEARNEY et al [23][24][25].…”

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%