[1] Yang Qun, He Wenhua,. Storage stability of SBS modified bitumenbased on mixed-level orthogonal array design [J]. Journal of Southeast University (English Edition), 2012, 28 (3): 337-343. [doi:10.3969/j.issn.1003-7985.2012.03.015]

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Storage stability of SBS modified bitumenbased on mixed-level orthogonal array design()

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

Volumn:

28

Issue:

2012 3

Page:

337-343

Research Field:

Traffic and Transportation Engineering

Publishing date:

2012-09-30

Info

Title:

Storage stability of SBS modified bitumenbased on mixed-level orthogonal array design

Author(s):

Yang Qun;  He Wenhua

Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China

Keywords:

storage stability;  mixed-level orthogonal array design;  separation softening point difference;  average softening point

PACS:

U414

DOI:

10.3969/j.issn.1003-7985.2012.03.015

Abstract:

The styrene-butadiene-styrene(SBS)modified bitumens with different contents of SBS modifiers are stored in different conditions to study the storage stability of SBS modified bitumen. Mixed-level orthogonal array design(OAD)is used and factors such as SBS modifier content, storage time, storage temperature and container size are chosen in a mixed-level OAD with an OA₁₆(3¹×4⁴)matrix. Parameters like the separation softening point difference(the separation difference of the ring and ball softening point of the top and bottom samples)and the average softening point(the arithmetic mean of the softening points of the top and bottom samples)are proposed to evaluate the separation and the ageing of modified bitumen during storage in this experiment, respectively. The results reveal that the separation and the ageing during storage exhibit a complicated variation for storage temperature and time. The separation softening point difference decreases with the storage temperature rising from 20 to 120 ℃ and increases with the temperature exceeding 120 ℃, and the average softening point drops with the storage time being prolonged. Different storage conditions have various effects on the storage stability of SBS modified bitumen.

References:

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Memo

Memo:

Biography: Yang Qun(1975—), male, doctor, associate professor, qunyang.w@tongji.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51178348).
Citation: Yang Qun, He Wenhua. Storage stability of SBS modified bitumen based on mixed-level orthogonal array design[J].Journal of Southeast University(English Edition), 2012, 28(3):337-343.[doi:10.3969/j.issn.1003-7985.2012.03.015]

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