[1] Ding Haibo, Zhang Hua, Wang Chenping,. Effects of polyphosphoric acid modified asphalton the low-temperature cracking of asphalt mixtures [J]. Journal of Southeast University (English Edition), 2016, 32 (2): 215-218. [doi:10.3969/j.issn.1003-7985.2016.02.014]

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Effects of polyphosphoric acid modified asphalton the low-temperature cracking of asphalt mixtures()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

32

Issue:

2016 2

Page:

215-218

Research Field:

Traffic and Transportation Engineering

Publishing date:

2016-06-20

Info

Title:

Effects of polyphosphoric acid modified asphalton the low-temperature cracking of asphalt mixtures

Author(s):

Ding Haibo¹;  Zhang Hua²;  Wang Chenping¹

¹School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
²Fuzhou Urban Planning and Design Research Institute, Fuzhou 350003, China

Keywords:

asphalt mixture;  low temperature;  polyphosphoric acid;  disk-shaped compact tension

PACS:

U414

DOI:

10.3969/j.issn.1003-7985.2016.02.014

Abstract:

In order to determine whether polyphosphoric acid(PPA)can partially or completely substitute styrene-butadiene-styrene(SBS)modifier while it does not adversely affect the resistance to thermal cracking of the asphalt mixture, the low-temperature fracture properties of the PPA modified mixtures are evaluated and compared to the SBS modified mixtures. First, laboratory compacted test samples were tested by the indirect tensile test(IDT)and the newly developed fracture testing protocol, named as disk-shaped compact tension(DCT). Then, the effects of the test temperature and air-void ratio on the low-temperature fracture properties of asphalt mixtures were analyzed. The results show that the fracture resistance of the PPA modified mixtures is worse than that of the SBS modified mixtures. However, for those modified mixtures that use the PPA substituting part of the SBS modifier, a relatively low-temperature fracture resistance can be obtained compared with the mixture only using the SBS modifier.

References:

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Memo

Memo:

Biographies: Ding Haibo(1990—), male, graduate; Wang Chenping(corresponding author), male, doctor, professor, wangcp@my.swjtu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51278060).
Citation: Ding Haibo, Zhang Hua, Wang Chenping. Effects of polyphosphoric acid modified asphalt on the low-temperature cracking of asphalt mixtures[J].Journal of Southeast University(English Edition), 2016, 32(2):215-218.doi:10.3969/j.issn.1003-7985.2016.02.014.

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