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Resources, Conservation and Recycling
A common differentiation is made between softening agents, also referred to as softening additives or fluxing agents, and rejuvenators, which are also called rejuvenating agents, recycling agents, or regenerators (Moghaddam and Baaj, 2016; Sá-da-Costa et al., 2016; Grilli et al., 2017; Kaseer et al., 2019).
Formulation of a new warm-mix recycling agent and its rejuvenating
It can be seen that penetration increases as the rejuvenator content increases for each rejuvenated asphalt, indicating that the recovered aged asphalt was rejuvenated gradually. ... its price was increased by $245.3 per ton. As a self-developed warm-mix recycling agent, WR possessed not only a relatively lower increased cost but …
Performance of warm asphalt mixtures containing reclaimed …
So, it has been determined that the rejuvenator used in this study can effectively improve the properties of asphalt mixtures containing recycled asphalt pavement. Finally, the rejuvenator agent used in this study allowed the utilization of recycled asphalt at a higher ratio than the amount specified in the Highway Technical Specification.
Evaluating Rutting Resistance of Rejuvenated Recycled Hot …
Evaluating Rutting Resistance of Rejuvenated Recycled Hot-Mix Asphalt Mixtures Using Different Types of Recycling Agents - PMC. Journal List. Materials …
Evaluation of recycling agent dosage selection and incorporation
A recycling agent is added to recycled mixtures to: (a) ... In the first phase of this study, when rejuvenator contents based on low PG recovery were proportionally added to different aged/unaged binder blends, it was observed that restoration of ductility and strength of the rejuvenated aged binder was limited. However, when an additional ...
The use of rejuvenating agents in production of recycled hot …
Rejuvenating agent, or rejuvenator, is one of the recycling agents and is suitable for either highly oxidized mixtures or mixtures containing a high percentage of RAP (more than 25% RAP) or recycled asphalt shingles (RAS) [8].
Formulation of a new warm-mix recycling agent and its rejuvenating
Formulation of a new warm-mix recycling agent and its rejuvenating effect on aged asphalt. Author links open overlay panel Zhixiang Wang a b, Jiange Li a, Zhengqi Zhang ... Behnood's research suggested that the properties of aged binders could be restored successfully with optimum rejuvenator content that was determined by the …
Effects of rejuvenators on bitumen ageing during
The additives specifically used to improve the performance of RAP mixtures are known as rejuvenators, rejuvenating agents, recycling agents, or regenerators. Rejuvenators are mainly intended to counteract the physical changes of bitumen after its service life (Zaumanis et al., 2014b; Kaseer et al., 2019).
Effect of a Recycling Agent on the Performance of High …
This project was conducted to evaluate the effect of a recycling agent (RA), known as Hydrogreen, on the long-term field performance of high RAP and RAS mixes. The field study consisted of three test sections, each constructed by placing a dense-graded surface lift at a depth of 4.5 cm (1.75 in.) on SR 7 near Harrisonville, Missouri, in August ...
Review Application of rejuvenators to improve the …
Knowledge about this mechanism could be useful to more efficiently select the appropriate rejuvenator for asphalt pavement recycling projects. The use of bio …
Determining Rejuvenator Content for Recycling Reclaimed …
A number of factors affect the short-and long-term effectiveness of recycling agents in rejuvenated asphalt mixtures (recycled asphalt mixtures with recycling agent), such as the source and ...
The use of rejuvenating agents in production of recycled …
In recycling mixture with high RAP content a rejuvenator is usually used. The recycling of reclaimed asphalt pavement is usually achieved by adding a rejuvenating agent into the aged pavement mix [56]. Rejuvenators are sometimes referred to as softening additives or recycling agents [57], [58], though, as it was described earlier a …
Mechanisms and research progress on biological …
Solubilizing agents could reduce the amide intermolecular interactions and amide affinity for forming ... Nciri et al. (2020) used waste pig fat (WPF) as a novel potential biosourced rejuvenator for recycling. The results showed that a waste pig fat-regenerated asphalt mixture has good low-temperature cracking resistance and fatigue cracking ...
Diffusion Study Using Fine-Aggregate Matrices Comprised …
Diffusion of the recycling agent into the RAP binder is a complex phenomenon influenced by many variables such as temperature and time of exposure to heat. ... T., X. Huang, Y. Zhao, and Y. Zhang. 2015. "Evaluation of the diffusion and distribution of the rejuvenator for hot asphalt recycling." Constr. Build. Mater. 98 (Nov): …
Diffusion Study Using Fine-Aggregate Matrices
@article{CarrerNardo2023DiffusionSU, title={Diffusion Study Using Fine-Aggregate Matrices Comprised of Reclaimed Asphalt Pavements and a Bio-Based Recycling Agent}, author={Renan Carrer Nardo and Andrise Buchweitz Klug and Adalberto Leandro Faxina}, journal={Journal of Materials in Civil Engineering}, year={2023}, …
Effects of recycling agents and methods on the fracture and …
Recycling agents are products with physical characteristics that can restore the properties of the oxidized asphalt binder [13]. Determining the acceptable content of the recycling agent is essential for the correct interaction between the binder present in the RAP and the binder. ... The study indicates that adding the rejuvenator to ...
Effects of Rejuvenation and Aging on Binder Homogeneity …
Abstract. Despite the well-recognized benefits of recycling milled asphalt pavement material, some remaining challenges limit the reclaimed asphalt pavement (RAP) …
Recycling of high percentages of reclaimed …
The recycling agent or rejuvenator allowed to partially regenerate RAP bitumen properties, which led to an easier blending between both the and the RAP bitumen and the materials and ...
Effect of Rejuvenator on HMA Mixtures with High RAP …
Using a recycling agent, or rejuvenator, is one possible approach to offsetting the higher binder stiffness and improving cracking resistance of a mixture when high RAP/RAS contents are used. Objective The objective of this study was to evaluate the effect of using a rejuvenator pre-blended with a asphalt binder on laboratory-
Diffusion and interaction mechanism of rejuvenating agent …
The quality of asphalt binder recycling is largely dependent on molecular diffusion between asphalt binder, aged asphalt binder, and rejuvenator. In this study, molecular dynamics (MD) simulations were used to study diffusion and interaction mechanism of rejuvenating agent in recycled asphalt binder. The diffusion process of …
Determining optimum rejuvenator dose for asphalt recycling …
Determining optimum rejuvenator dose for asphalt recycling based on Superpave performance grade specifications. Author links open overlay panel Martins Zaumanis a, Rajib B. Mallick a 1 ... Hence it seems that adding the recycling agents at a dose calculated to reach the penetration of binder would also ensure the required …
A comprehensive review on the fatigue resistance of …
The rejuvenator of Rapiol (an oil-based recycling agent, viscosity: 1300 centistokes) with a higher content of maltene outperforms the Cyclogen (an oil-based recycling agent, viscosity: 1000 centistokes) in terms of fatigue resistance regardless of the RAP material content at lower stress levels, and it also shows that the amount of …
Towards sustainable roads: A State-of-the-art review on the …
To overcome this barrier, recycling agents (RAs) are used to extend the break-even point and/or provide savings, both in terms of performance, cost-effectiveness as well as environmental impacts. ... The diffusion capacity of rejuvenator shows a more dominant effect on rejuvenation efficiency than fractional free volume.
Recycling Agent
7.3.7.3 Recycling agents. Recycling of asphalt materials is becoming a common practice due to the decreasing availability and increasing cost of new aggregate, the increasing cost of asphalt cements, and the reduction of available funds for transportation facilities. To meet desired specification requirements, recycling agents …
Recycling long-term-aged asphalts using bio …
Based on the PG-grade results, the 5%-bio-rejuvenator is recommended to recycle the long-term-aged Pen70 asphalt, and the 10%-bio-rejuvenator is suggested to recycle the long-term-aged SBS-modified asphalt. ... Performance research of regenerative agent based on SBS-modified asphalt. J. Build. Mater. (2015) Google Scholar [15] …
Effects of utilization of rejuvenator in asphalt
Finally, the rejuvenator agent used in this study allowed the utilization of recycled asphalt at a higher ratio than the amount specified in the Highway Technical Specification. Previous article in issue; ... In asphalt mixtures containing RAP, rejuvenator/recycling agents (RA) are added to the asphalt mixtures to reduce the viscosity of the ...
ReLIXER Asphalt Rejuvenator helps empower increased RAP …
Our asphalt rejuvenator / recycling agent, ReLIXER, is a specially formulated elixir of bio-based oils, a Recycling Agent that rejuvenates the aged bitumen in Reclaimed Asphalt Pavement (RAP) and Reclaimed Asphalt Shingles (RAS). Tested and proven, Sripath's ReLIXER is the market-leading asphalt rejuvenator / recycling technology – trusted by …
Compatibility of Recycled Binder Blends with Recycling Agents
Public and private sectors promote increased use of recycled materials in asphalt pavement construction. However, concerns exist about possible premature pavement embrittlement and cracking because of these aged materials. Recycling agents, or rejuvenators, are used to offset these concerns. Rejuvenation mechanisms can be …
Application of reactive rejuvenator in aged SBS modified …
Therefore, the study of reactive rejuvenator agent is a promising initiative to enhance the recycling rate of waste SBSMA materials. 3. ... Effect of Recycling Agents on Rheological and Micromechanical Properties of SBS-Modified Asphalt Binders. Adv. Mater. Sci. Eng., 2018 (2018), pp. 1-12, 10.1155/2018/5482368.