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A comprehensive review of bio-oil, bio-binder and bio-asphalt materials: Their source, composition, preparation and performance

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第2期9卷 151-166页

作者： Zhengqi Zhang Ying Fang Jianhua Yang Xinjun Li Key Laboratory for Special Area Highway Engineering of Ministry of Education Chang’an UniversityXi'an 710064China

To promote the application of bio-materials and provide a direction for their further researches,this paper comprehensively summarizes the research progress of biomaterials in recent years.The review results show that bio-oil is a mixture obtained from different biomasses through pyrolysis,alcoholysis,acidolysis,high liquefaction,etc.,and those biomasses mainly include wood fiber type,waste oil type and animal manure type.biobinder refers to the product of bio-oil processed by distillation,extraction oxidation and polymer modification,and it can be served as a modifier,diluent or substitute material of asphalt;the main chemical components of bio-oil include ethers,esters,aldehydes,ketones,phenols,organic acids,alcohols and sugars.bio-asphalt is obtained by adding biobinder into the petroleum asphalt for modification or blending,and the shear temperature and shear rate of bio-asphalt derived from wood fiber type and waste oil type are usually higher than that of bio-asphalt derived from swine manure.Compared with petroleum asphalt,bio-asphalt binder usually shows lower high-temperature performance as well as higher low-temperature performance and aging resistance.Also,bio-asphalt mixture generally exhibits lower high-temperature stability,higher low-temperature crack resistance and water stability than petroleum asphalt mixture.Future studies should be conducted combining with the source,composition,preparation,properties and oil production rate of bio-oil.First,how to raise the bio-binder content in bio-asphalt as much as possible while ensuring the sufficient performance becomes the focus of future researches.Second,the micro reaction mechanism between bio-binder and petroleum asphalt should be illustrated in depth.Moreover,developing a complete and unifying technical standard and application specification of bio-asphalt technology is necessary for future researches.Furthermore,determining the optimum bio-binder potentially used as the substitute of petroleum asphalt is also an interesting topic.

关键词： bio-oil bio-binder bio-asphalt Road performance Environmental protection

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Preparation process of bio-oil and bio-asphalt,their performance,and the application of bio-asphalt:A comprehensive review

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Journal of Traffic and Transportation Engineering(English Edition) 2020年第2期7卷 137-151页

作者： Hainian Wang Ziye Ma Xi Chen Mohd Rosli Mohd Hasan School of Highway Chang'an UniversityXi'an 710064China School of Civil Engineering Universiti Sains MalaysiaNibong Tebal 14300Pulau PinangMalaysia

The objective of this paper is to establish the state of knowledge on fast pyrolysis of bio-oil and bio-asphalt binder and to facilitate efforts in improving the overall perform ance of bioasphalt and maximizing its road application.On the basis of reviewing the relevant literature recently,the fast pyrolysis(FasP) preparation process of bio-oil and its main properties,the preparation process of bio-asphalt and its performance and the application of bio-asphalt have been summarized.Due to the variations in raw materials,the adopted methods of FasP to prepare bio-oil could be different,and the properties of bio-oil from different sources are also different.At present,the plant-based bio-oil(mainly derived from wood waste and sawdust) has been widely used to prepare the bio-asphalt.Research on the low-temperature flexibility,high-temperature rheology,workability and other performance of biological asphalt showed that the workability and high-temperature performance of most asphalt are improved after adding bio-oil.However,the low-temperature performance is found to relatively reduce.Also,with regards to its application as a rejuvenator,bio-oil can considerably rejuvenate the aged asphalt’s mixture performance.By far,most of research on bio-asphalt is still focused on the performance of bio-asphalt binder in the laboratory;its application in practical road engineering is still to be examined.This review also provides an outlook for the future,for example,establishing an integrated preparation process from bio-oil to bio-asphalt,and evaluating the properties of bioasphalt by new standards.

关键词： Road engineering bio-oil bio-asphalt Preparation process Performance Application of bio-asphalt

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