Performance of Warm Mix Recycled Asphalt containing up to 100% RAP

Dinis-Almeida, Marisa; Castro-Gomes, João; Sangiorgi, Cesare; Zoorob, Salah E.; Afonso, Márcia Lopes

doi:10.1016/j.conbuildmat.2016.02.108

Cited by 101 publications

(34 citation statements)

References 13 publications

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“…Moreover, for the stress levels tested, the HWMRA with 100 % RAP showed greater fatigue resistance in comparison with both the HWMRA with 70 % RAP and the HMA. Similar results have also been found by other researchers for Warm Mix Asphalt (WMA) containing up to 100 % RAP (15). Thus, it appears that further reducing the manufacturing and compaction temperatures does not adversely affect the advantages of using a WMA with high RAP content.…”

Section: Field Experience Resultssupporting

confidence: 77%

“…This issue prevents their widespread use, particularly in wearing courses (due to the high requirements of this layer). Recent work has therefore focused on showing that reducing temperatures to within the warm/half-warm range and introducing RAP should not compromise the performance of the mixes (13)(14)(15). In particular, mixes containing a high RAP content manufactured with low temperature technologies have been shown to have better (or equivalent) fatigue and rutting resistance when compared with HMA, without any adverse effects on water sensitivity (7,16,17).…”

Section: Introductionmentioning

confidence: 99%

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Mechanical performance assessment of half warm recycled asphalt mixes containing up to 100 % RAP

Lizárraga¹,

Carrión

Ramírez³

et al. 2017

Mater. construcc.

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ABSTRACT:The use of Half Warm Mixes with high Reclaimed Asphalt content (HWMRA) has the potential to generate significant environmental advantages such as the reduction in consumption of natural resources and the emission of gases into the atmosphere. This paper therefore focuses on demonstrating the viability of using these types of mixes in wearing courses. For this purpose, an HWMRA with 70 % and 100 % Reclaimed Asphalt Pavement (RAP) and emulsion were designed in the laboratory. The performance of the mixes was then assessed and compared with that of conventional Hot Mix Asphalt. In a second stage, the mixes were manufactured in-plant, and laid and compacted in an Accelerated Pavement Test track. The cores were then extracted and tested for stiffness modulus and resistance to fatigue. The results from the tests conducted with both the laboratory specimens and the cores showed that the performance of HWMRA is comparable to that of HMA. These findings encourage greater confidence in promoting the use of these types of sustainable asphalt mixes. RESUMEN:Evaluación del comportamiento mecánico de mezclas asfálticas templadas con 100 % de material reciclado. La utilización de mezclas asfálticas templadas con alto contenido de asfalto reciclado (HWMRA) conlleva ventajas medioambientales como la reducción del consumo de recursos naturales y la emisión de gases a la atmósfera. Este artículo se centra en mostrar la viabilidad de este tipo de mezclas para capas de rodadura. Para ello, se diseñaron mezclas HWMRA con 70 % y 100 % de asfalto reciclado en el laboratorio y se evaluó y comparó su comportamiento con una mezcla caliente convencional. En una segunda etapa, las mezclas fueron fabricadas en planta, extendidas y compactadas en una pista de ensayo acelerado de pavimentos. A continuación, se extrajeron testigos y se ensayaron para conocer su módulo de rigidez y resistencia a fatiga. Tanto los resultados de laboratorio como tras la fabricación en planta y puesta en obra mostraron que el comportamiento de mezclas HWMRA es comparable al de mezclas calientes convencionales. Dicha conclusión puede aportar confianza a este tipo de mezclas sostenibles promoviendo su mayor utilización.

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Section: Field Experience Resultssupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Mechanical performance assessment of half warm recycled asphalt mixes containing up to 100 % RAP

Lizárraga¹,

Carrión

Ramírez³

et al. 2017

Mater. construcc.

View full text Add to dashboard Cite

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“…The rutting performance of warm mix recycled asphalt was similar to that of HMA [59]. The use of surfactant additive showed improved rut resistance of WMA mixes produced with and without RAP, although the additive was more efficient with RAP-WMA mixes [54].…”

Section: Rutting Potential and Complex Shear Modulusmentioning

confidence: 67%

“…The presence of RAP may lead to increased thermal cracking potential for all types of WMA additives (Evotherm 3G, Rediset LQ, Sasobit, and Advera) [60]. The fatigue resistance of warm mix recycled asphalt was similar to that of HMA [70]. The WMA additive and lower production temperatures show no effect on the fatigue life of WMA mixes.…”

Section: Thermal Cracking and Fatiguementioning

confidence: 74%

“…The lower compaction temperatures used when producing WMA with any such WMA additive may increase the potential for moisture damage [53]. The WMA-RAP mixture showed better results in terms of moisture sensitivity than HMA mixture [70]. WMA-high RAP surface mixtures showed better resistance to moisture regardless of WMA technology.…”

Section: Moisture Susceptibilitymentioning

confidence: 99%

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Use of reclaimed asphalt pavement (RAP) in warm mix asphalt (WMA) pavements: a review

Farooq

Mir

2017

Innov. Infrastruct. Solut.

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The limit in the use of reclaimed asphalt pavement material (RAP) proportion is restricted due to stiffness and workability issues related to RAP. This problem is addressed with the help of warm mix asphalt (WMA) which increases the proportion of RAP used by producing mixes having same/better properties viz., better workability, reduced viscosity than hot mix asphalt (HMA) at lower temperatures. This paper reviews research conducted on the use of RAP material in WMA pavements. It presents and discusses work done with regard to different recycling methods and on conversion of RAP into HMA. It analyzes the benefits/need of using RAP in WMA in light of previous research findings and the influence on engineering properties of WMA due to RAP introduction. This paper also discusses field performance, environmental/economic impact and some limitations of these mixes.

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A New Green Rejuvenator: Evaluation of Structural Changes of Aged and Recycled Bitumens by Means of Rheology and NMR

et al. 2018

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Performance of Warm Mix Recycled Asphalt containing up to 100% RAP

Cited by 101 publications

References 13 publications

Mechanical performance assessment of half warm recycled asphalt mixes containing up to 100 % RAP

Mechanical performance assessment of half warm recycled asphalt mixes containing up to 100 % RAP

Use of reclaimed asphalt pavement (RAP) in warm mix asphalt (WMA) pavements: a review

A New Green Rejuvenator: Evaluation of Structural Changes of Aged and Recycled Bitumens by Means of Rheology and NMR

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