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Study on Rheological and Temperature Sensitive Properties of Recycled Asphalt from Furfural Extraction Oil
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[1]WU Wenliang,DAI Shenglin,SI Li.Study on Rheological and Temperature Sensitive Properties of Recycled Asphalt from Furfural Extraction Oil[J].Journal of Zhengzhou University (Engineering Science),2022,43(03):52-58.[doi:10.13705/j.issn.1671-6833.2022.03.005]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 43卷 Number of periods: 2022 03 Page number: 52-58 Column: Public date: 2022-04-10
Title:
Study on Rheological and Temperature Sensitive Properties of Recycled Asphalt from Furfural Extraction Oil
Author(s):
WU Wenliang;  DAI Shenglin;  SI Li
School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China
Keywords:
furfural extraction oil;  recycled asphalt;  degree of asphalt aging;  rheological properties;  temperature sensitivity
CLC:
U414
DOI:
10.13705/j.issn.1671-6833.2022.03.005
Abstract:
In order to find out the regeneration effect of furfural extraction oil as asphalt regeneration agent on asphalt with different aging degrees, the rheological properties and temperature sensitivity of furfural extraction oil recycled asphalt were studied.By adding furfural extraction oil to asphalt with mild, moderate and severe aging degrees, the dynamic shear rheological tests and bending creep tests were used to study the influence of furfural extraction oil on the rheological properties and temperature sensitivity of aged asphalt, and the rheological properties and temperature sensitivity of recycled asphalt were evaluated with different indexes.The results showed that with the increase of furfural extraction oil content, the middle temperature fatigue resistance and low temperature crack resistance of aging asphalt were improved, and the high temperature deformation resistance was reduced.The performances of asphalt with different aging degree could be restored to the level of matrix asphalt under suitable furfural extraction oil content.The multiple stress creep test was more suitable for evaluating the high temperature deformation resistance of asphalt than the rutting factor.The evaluation results of the fatigue factor and linear scanning amplitude test on mesothermal fatigue resistance of asphalt were consistent.The temperature sensitivity of recycled asphalt had different performance in different temperature ranges.In the temperature range of 46-76 ℃, with the increase of furfural extraction oil content, the temperature sensitivity of three kinds of recycled asphalt was enhanced.In the temperature range of-18--6 ℃, the evaluation results of the creep rate index on the temperature sensitivity were better than those of the creep stiffness index.Temperature sensitivity of severe aging recycled asphalt increased with the increase of furfural extraction oil content, while the temperature sensitivity of mild and moderate aging recycled asphalt decreased.With the basic recovery of each index to the same as the virgin asphalt, the optimum content was determined as mild aging 4%, moderate aging 7%, severe aging 8%.
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