Influence of phosphorous methyl compound on asphalt binder

ABSTRACT

This paper proposes the use of phosphorous methyl compound (PMC) as a modifier in asphalt binder to improve its viscoelastic properties. Dosage of PMC was optimised using conventional and other rheological tests. Fourier transform infrared spectroscopy analysis was also conducted to assess the functional groups between asphalt binder and the PMC. Asphalt binder and mixtures were prepared and tested using performance testing to verify the effect of the PMC on their performance. Based on experimental results, an optimum dosage of 0.75% PMC by weight of asphalt binder is recommended for improvement in asphalt properties. Upon the inclusion of 0.75% dosage by weight of the PMC, the asphalt binder with performance 58 grade has performed equivalent to that of superpave PG 76 grade asphalt binder. An addition of about 0.75% PMC by weight of asphalt binder improved rutting resistance, dynamic modulus and resistance to moisture damage by around 30%.

KEYWORDS:

• Asphalt binder
• phosphorous methyl compound (PMC)
• Fourier transform infrared spectroscopy (FTIR)
• rutting
• moisture damage

Acknowledgements

The authors thank Waqas Ahmed for his support and guidance.

Disclosure statement

No potential conflict of interest was reported by the authors.