热解炭黑及其偶联产物改性沥青PG分级研究
Study on Classification of Pyrolytic Carbon Black and Its Coupled Product Modified Asphalt PG

DOI: 10.12677/OJTT.2019.84033, PP. 271-280

Keywords: 道路工程，PCB，改性沥青，偶联，SBS
Road Engineering, PCB, Modified Asphalt, Coupling, SBS

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Abstract:

为探讨热解炭黑(PCB)改性沥青的性能，以PCB、及对PCB进行偶联处理制备偶联炭黑(简称偶联PCB)为研究对象，制备改性沥青及复合改性沥青。试验通过不同掺量下PCB改性沥青、偶联PCB改性沥青、PCB-SBS复合改性沥青的PG分级试验、离析试验和黏度试验，研究了PCB、偶联PCB掺量对基质沥青、SBS改性沥青高低温性能、贮存稳定性、拌和温度与压实温度的影响。研究结果表明：基质沥青中PCB掺量从0%至25%时PG分级都为64-22；SBS改性沥青中PCB掺量从0%至20%时PG分级都为70-22，在掺量为25%时PG分级达到76-22；偶联PCB相比PCB改性沥青贮存稳定性显著提升，但PG分级无变化。建议热解炭黑在基质沥青中掺量不超过15%，在SBS改性沥青中掺量为10%；偶联PCB掺量为15%。
In order to investigate the performance of pyrolysis carbon black (PCB) modified asphalt, the coupled carbon black (referred to as coupled PCB) was prepared by PCB and PCB coupling treatment to prepare modified asphalt and composite modified asphalt. PG grading test, separation test and viscosity test of PCB modified asphalt, coupled PCB modified asphalt and PCB-SBS composite modified asphalt under different dosages were studied. The PCB and coupled PCB content were used to study the matrix asphalt, SBS modified asphalt with high and low temperature performance and storage stability and mixing compaction temperature. The results show that the PG classification is 64-22 when the PCB content in the matrix asphalt is from 0% to 25%; the PG classification is 70-22 when the PCB content in the SBS modified asphalt is from 0% to 20%. When the amount is 25%, the PG grade reaches 76-22; the storage stability of the PCB modified asphalt is significantly improved compared with the PCB, but the PG grade is unchanged. It is recommended that the amount of pyrolytic carbon black is not more than 15% in the matrix asphalt, 10% in the SBS modified asphalt, and 15% in the coupled PCB.

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