Journal of South China University of Technology(Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (11): 24-30.doi: 10.3969/j.issn.1000-565X.2017.11.004

• Traffic & Transportation Engineering • Previous Articles     Next Articles

High-Temperature Performance Evaluation of Bio-Asphalt on the Basis of MSCR Test

GAO Jun-feng1 WANG Hai-nian1 YOU Zhan-ping1,2 CHEN Xi1 JIANG Xin1   

  1. 1.Road Structure and Materials Key Laboratory for Transportation,Chang’an University,Xi’an 710064,Shaanxi,China; 2.Department of Civil and Environmental Engineering,Michigan Technological University,Houghton 49931,USA
  • Received:2017-01-13 Online:2017-11-25 Published:2017-10-01
  • Contact: 高俊锋(1988-)，男，博士生，主要从事路面材料与结构研究． E-mail:gaojunfeng@chd.edu.cn
  • About author:高俊锋(1988-)，男，博士生，主要从事路面材料与结构研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China(51378074，51578075)

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Abstract: The PG high-temperature classification,unrecoverable creep compliance,creep recovery rate and stress sensitivity of the bio-asphalt with different bio-oil dosages and temperatures were investigated by a high-temperature classification test and a multiple stress creep recovery test (MSCR),and the classification of the high-temperature performance of the bio-asphalt on the basis of the AASHTO MP 19 standard was analyzed.Then,the high-tempera- ture performance of bio-asphalt mixtures was verified by a rutting test.The results show that (1) the critical tem- perature of integrated asphalt rutting factor produces a significant effect on the classification of origin bio-asphalt; (2) as compared with the matrix asphalt and S100 asphalt,the bio-asphalt achieves a higher recovery rate but with a smaller creep compliance; (3) the unrecoverable creep compliance and the stress sensitivity of the creep recovery rate show no obvious rule with the change of the bio-oil dosage,while the stress sensitivity of the bio-asphalt increa- ses with the rise of temperature; and (4) 64℃ can be used as the reference temperature for high-temperature clas- sification of low-dosage bio-asphalt.

Key words: bio-asphalt, high-temperature performance, multiple-stress creep recovery test, stress sensitivity