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Antiinterference index of electrochemical detectiontechnology for SBS content of modified asphalt(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2019年01期
Page:
44-52
Research Field:
道路工程
Publishing date:

Info

Title:
Antiinterference index of electrochemical detectiontechnology for SBS content of modified asphalt
Author(s):
FENG Xin-jun;  ZHAO Meng-long;  TANG Xiong;  ZHU Zi-qiang
(1. Key Laboratory of Road Structure and Material of Ministry of Transport, Changsha University of Science &Technology, Changsha 410114, Hunan, China; 2. School of Traffic and Transportation Engineering,Changsha University of Science & Technology, Changsha 410114, Hunan, China; 3. School ofGeosciences and InfoPhysics, Central South University, Changsha 410083, Hunan, China)
Keywords:
road engineering;  antiinterference index;  electrochemical detection technology;  technical performance test;  SBS modified asphalt
PACS:
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DOI:
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Abstract:
In order to identify whether SBS modified asphalt is mixed with SBS analogs or asphalt analogs， and eliminate the interference of that in the modified asphalt to SBS content electrochemical detection technology.Rubber powder, furfural extract oil, and aromatic oil were added to modified asphalt to simulate the production of modified asphalt with them, in order to reduce the SBS content.Electrochemical tests for the SBS content of the modified asphalt standard sample with different SBS contents were carried out, and the standard curve of the titration volume to the SBS content of the standard sample was established.At the same time, the penetration, ductility, softening point, elastic recovery, and 135 ℃ kinematic viscosity of the modified asphalt samples with different SBS contents were tested, the curves of the technical indexes to the standard SBS content were fitted.Then, the modified asphalt samples with different contents of interferences agents were tested by electrochemical detection of the SBS content and the above mentioned performance tests, and the corresponding relationship curves were established.By comparing and analyzing the relation curves obtained from the tests on the modified asphalt samples, with the interference agents and the standard curves obtained from the tests on the modified asphalt standard samples,the indexes that can identify whether or not interference agents were added to modified asphalt could be obtained. The reliability of the proposed index of the electrochemical detection technology for the SBS content of modified asphalt was studied.The results show that ductility can be used to identify whether rubber powder is added to modified asphalt, and the ductility and softening point can be used to identify whether furfural extract oil and aromatic oil are added to modified asphalt. The correlation coefficients of ductility and softening point with SBS content are all above 0.937, which has passed the significance test. 6 tabs, 14 figs, 26 refs.

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Last Update: 2019-01-28