Effect of Bio-Oils on Binder and Mix Properties with High RAP Binder Content

Saha, Rajib; Melaku, R. S.; Karki, Bishal; Berg, A.; Gedafa, Daba S.

doi:10.1061/(asce)mt.1943-5533.0003057

Cited by 19 publications

(9 citation statements)

References 17 publications

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“…Rejuvenators must contain a high proportion of maltene constituents, which are required to keep asphaltenes dispersed [ 99 ]. Vegetal oils, such as soybean, sunflower, corn, cashew nut shell, or castor oils, have been reported to more effectively reduce the hardness of aged asphalt binders compared with rejuvenators based on mineral oils [ 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 ]. Moreover, the use of waste cooking oil is an eco-friendly solution due to its great performance as a rejuvenating agent [ 110 , 111 , 112 , 113 , 114 , 115 ].…”

Section: Resultsmentioning

confidence: 99%

Self-Healing Asphalt: A Systematic Bibliometric Analysis for Identification of Hot Research Topics during the 2003–2018 Period

Abejón

2021

Materials

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The use of self-healing asphalt is a good option to extend the lifetime of roads and to improve the sustainability of pavement management systems. A bibliometric analysis based on the Scopus database was carried out to review the global research related to self-healing asphalt from 2003 to 2018 and to identify relevant quantitative characteristics from the research in this period. The results from this analysis revealed that the number of accumulated publications followed an exponential growth, which confirmed the relevance that this research topic has gained during the last years. The study revealed that China was the most productive country, followed by the Netherlands, where the most prolific institution is located: Delft University of Technology. Some important research features of the two main approaches most frequently used to develop asphalt mixtures with enhanced self-healing abilities (external heating and encapsulated rejuvenating agents) are compiled in this work.

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Section: Resultsmentioning

confidence: 99%

Self-Healing Asphalt: A Systematic Bibliometric Analysis for Identification of Hot Research Topics during the 2003–2018 Period

Abejón

2021

Materials

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“…Waste Cooking Oil (WCO) holds promise as an alternative source of rejuvenator [51,52], which is readily available [26], more than 18 million tons of WCO is produced annually worldwide. WCO is considered to have detrimental effects on the environment by altering the oxygen levels of water due to the formation of an impermeable layer on the water surface.…”

Section: Bio-utilisation: Use Of Bio Oils As Bitumen Additives and Re...mentioning

confidence: 99%

Is this the end of the road for bio-inspired road construction materials?

Tabaković¹

2022

RILEM Tech Lett

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The global road network spans 64.3million km and is of huge significance for the social and economic development. The level of investment in road construction and maintenance is high, e.g. EU €44billion/year (2019), China €614.7billion/year (2019) and US €94billion/year (2019). Despite the level of investment, there has been minimal investment in the development of new asphalt technologies, particularly when compared with R&D investment in other industries, such as the automotive industry. Despite the limited investment, there have been some innovations in asphalt technology. For the past 20 years, researchers have developed bio-inspired asphalt technology, self-healing and bio-binders and have applied them to asphalt pavements. This research has emerged as a response to global warming and the need to reduce both carbon emissions and reliance on oil in asphalt technology. This paper charts the development of two bio-inspired technologies and considers their significance in relation to the need to reduce carbon emissions and oil dependence (in line with the UN strategic goals, specifically: SDG 9, 11 and 12). This paper considers the potential benefits of bio-inspired technologies and outlines the current barriers to their further development. This paper aims to begin a conversation with stakeholders on how to speed up the acceptance of bio-inspired asphalt technologies and their adoption in road design, construction and maintenance. Or is it the case that we have reached the end of the road for bio-inspired road construction materials?

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“…Rejuvenators can restore the virgin properties of bitumen and induce volatile compounds to get the original asphaltenes to maltenes ratio back [ 8 , 9 ]. Several vegetable oils and mineral oils have been used by researchers to rejuvenate aged asphalt successfully [ 10 , 11 , 12 , 13 , 14 , 15 ]. These oils and rejuvenators possess properties to improve the lost properties of bitumen [ 16 , 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Self-Healing Evaluation of Asphalt Concrete Containing Encapsulated Rejuvenator

et al. 2022

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Ultraviolet radiation, oxidation, temperature, moisture, and traffic loads produce degradation and brittleness in the asphalt pavement. Microcracks develop into macrocracks, which eventually lead to pavement failure. Although asphalt has an inherent capacity for self-healing, it is constricted. As a result, damages build beyond the ability of asphalt to repair themselves. This research employs the in-situ crack healing method of encapsulated rejuvenator technology to enhance the insufficient self-healing capability of roads. This allows the extrinsically induced healing in asphalt to assist it in recovering from damage sustained during service life. Optical microscopy, thermogravimetric analysis, and the compressive load test of capsules were done to characterise their properties. We measured the self-healing behaviour of encapsulated rejuvenator-induced asphalt utilising the three-point bending beam tests on unaged, short-term aged and long-term aged asphalt beams. The rate of oil release before and after healing was quantified using Fourier transform infrared spectroscopy. The results of these tests were utilised to explain the link between healing time, temperature, asphalt ageing, and healing level. Overall, it was determined that the encapsulated rejuvenator was acceptable for mending asphalt mixes because it increased healing temperature and duration, resulting in an up to 80% healing index.

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Effect of Bio-Oils on Binder and Mix Properties with High RAP Binder Content

Cited by 19 publications

References 17 publications

Self-Healing Asphalt: A Systematic Bibliometric Analysis for Identification of Hot Research Topics during the 2003–2018 Period

Self-Healing Asphalt: A Systematic Bibliometric Analysis for Identification of Hot Research Topics during the 2003–2018 Period

Is this the end of the road for bio-inspired road construction materials?

Comprehensive Self-Healing Evaluation of Asphalt Concrete Containing Encapsulated Rejuvenator

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