Technologies and Principles of Hot Recycling and Investigation of Preheated Reclaimed Asphalt Pavement Batching Process in an Asphalt Mixing Plant

Sivilevičius, Henrikas; Bražiūnas, Justas; Prentkovskis, Olegas

doi:10.3390/app7111104

Cited by 37 publications

(25 citation statements)

References 43 publications

(45 reference statements)

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“…Required virgin aggregates temperature VA T which is needed to achieve targeted AM temperature of 160 o C were calculated in different way according to formulas (1), (2), (3) and (4):(1) (Sivilevičius et al, 2017):…”

Section: Experimental Am Production Test In Amp Applying Cold Rap Addmentioning

confidence: 99%

Analysis of Design and Technological Processes of Hot Recycling Asphalt Mixture at Batch Asphalt Mixing Plants

Martišius

Sivilevičius

2020

International Conference “Environmental Engineering”

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European Union members seek to establish the principles of a circular economy, which is based on the efficient use of raw materials and resources. This requirement will have an impact on business and in particular on the road construction sector. Hence the need to improve the asphalt mixing plant (AMP) mixing technology utilizing as much as possible reclaimed asphalt pavement (RAP) to produce asphalt mixtures (AM) for road construction. The resources used to produce new AM in the world are endless and becoming more expensive in a time scale. The multi-cycle reuse of RAP producing AM is a priority, when thinking about of economical recycling materials usage and the saving of resources. The design and development of RAP hot recycling in-plant technologies has been in progress for approximately half a century. In high-level-economy countries, AM production currently processes on average approx. 80% of the amount of RAP using innovative techniques on AMPs. Design of various AMP, their assessment on the flexible application of innovative techniques depending on the RAP processing method, are described in this paper. In this paper different recycling technologies in AMP and their advantages and disadvantages are reviewed. The research result indicates technical possibilities hot recycling in-plant in Baltic countries. Local authorities, research institutes, road construction and road design companies could use these results in the future.

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Section: Experimental Am Production Test In Amp Applying Cold Rap Addmentioning

confidence: 99%

Analysis of Design and Technological Processes of Hot Recycling Asphalt Mixture at Batch Asphalt Mixing Plants

Martišius

Sivilevičius

2020

International Conference “Environmental Engineering”

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“…Road renewal/reconstruction will therefore continue to be required. One technology that is becoming increasingly conventional, and where the only barrier to uptake is investment in adapted plant, is so-called hot in-plant asphalt recycling [4]. Just as waste steel can be taken back to a foundry and incorporated into a new product, so waste asphalt can be taken back to an asphalt plant and incorporated into a new mixture.…”

Section: Barriers To Non-conventional Technologiesmentioning

confidence: 99%

Sustainable Road Design: Promoting Recycling and Non-Conventional Materials

Thom

Dawson

2019

Sustainability

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Many factors impact on the sustainability of road maintenance, including the organization of road authorities, contract forms used, financing structure and, unfortunately, political interference and corruption. However, this paper reviews the opportunities to increase sustainability by utilizing less environmentally damaging material sources, and also the associated challenges. It is a field that has seen advances in recent decades, for example in the effectiveness of cold-mix asphalt binders. Nevertheless, the opportunities are not being taken up in many countries, and this reflects uncertainty in predicting performance. This paper reviews the different design methods available, developed in both temperate and tropical climates, and highlights the lack of agreement with regard to non-conventional materials. The different sources of uncertainty and risk are then discussed, together with ways of limiting them. It is found that, while advances in performance prediction are highly desirable, the key to encouraging recycling and the use of inexpensive but non-conventional materials lies in development of the right contractual arrangements, specifically partnering and risk/reward sharing. The paper concludes with a discussion on approaches to partnering in the construction industry and the prerequisite climate of trust without which innovation is almost inevitably stifled.

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“…RAP usually has lower road performance due to the aging of bitumen [ 4 , 5 , 6 ]. A rejuvenator that can reconstitute the chemical component and colloidal structure of aged bitumen to regenerate its performance [ 7 , 8 ] is crucial for the recycling of RAP.…”

Section: Introductionmentioning

confidence: 99%

Diffusibility Enhancement of Rejuvenator by Epoxidized Soybean Oil and Its Influence on the Performance of Recycled Hot Mix Asphalt Mixtures

et al. 2018

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Epoxidized soybean oil (ESO) was employed as a novel penetrant cooperating with a conventional rejuvenator (CR) for the recycling of reclaimed asphalt pavement (RAP). The influence of ESO on the diffusibility and the regenerating effects of CR on RAP were investigated. The diffusibility testing result shows that the diffusibility of CR is enhanced by the addition of ESO because the epoxy group in ESO can facilitate asphaltene dispersion due to its high polarity, which simultaneously reduces the viscosity and improves the fluidity of aged bitumen so as to allow diffusion of the rejuvenator into the aged bitumen. Road performance testing of a recycled hot mix asphalt mixture (RHMA) indicates that the fatigue and cracking resistance properties as well as the water stability of RHMA containing CR can be improved by the addition of ESO due to the diffusibility enhancement of CR, which boosts the regenerating effect of CR on aged bitumen in RAP. The fatigue and cracking resistance properties as well as the water stability of the recycled hot mix asphalt mixture containing CR with 7 wt % ESO approximate those of the hot mix asphalt mixture composed of the same virgin aggregates and bitumen. Taking into account the rutting resistance decline versus the addition of ESO, the content of ESO should not exceed 7 wt % of the conventional rejuvenator.

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Technologies and Principles of Hot Recycling and Investigation of Preheated Reclaimed Asphalt Pavement Batching Process in an Asphalt Mixing Plant

Cited by 37 publications

References 43 publications

Analysis of Design and Technological Processes of Hot Recycling Asphalt Mixture at Batch Asphalt Mixing Plants

Analysis of Design and Technological Processes of Hot Recycling Asphalt Mixture at Batch Asphalt Mixing Plants

Sustainable Road Design: Promoting Recycling and Non-Conventional Materials

Diffusibility Enhancement of Rejuvenator by Epoxidized Soybean Oil and Its Influence on the Performance of Recycled Hot Mix Asphalt Mixtures

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