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

Abstract

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.

Mechanical properties of asphalt mixtures containing reclaimed asphalt incorporating Acrylonitrile Butadiene Styrene (ABS)

“…The recycle materials are possible to use as the partial replacement in the virgin asphalt mix which does not affect the Marshall parameters such as volumetric parameters, stability and flow in the construction of the new flexible pavement [6]. The study's findings reveal that the approach of establishing hot recycled asphalt mixtures with the incorporation of RAP is not only an appealing choice based on the notion of environmental sustainability, but also a source of financial expense reduction relying on rivalry for the design of flexible asphalt pavement overlays [7]. The researchers also found out that, the virgin binder consumption can be reduced by 12.9% and 35.7% by incorporating 10% and 30% RAP respectively in the virgin asphalt mix [8].…”

Behavior of reinforced concrete beam with CFRP and GFRP laminates

“…The GFRP-strengthened beams had a higher failure load than the un-strengthened beam, but it was lower than the CFRP-strengthened beams [20]. The failure caused by splitting of concrete at the tension face indicates that the GFRP laminates were effective in controlling the propagation of cracks in the concrete, similar to the CFRP laminates [21][22][23][24].…”

Evaluation of mechanical properties for stone mastic asphalt containing textile waste

“…In addition to preventing waste of resources, raising living standards. Developed countries that see this reality with their efforts are developing methods for recycling and reuse of wastes [4][5][6].…”