Author(s)

Ning Li, Wei Huang

Corresponding Author

Ning Li

Abstract

This paper introduces a new preparation method of RPRS modified asphalt. Three kinds of matrix asphalts are modified through this method. Afterwards, the basic performances of RPRS modified asphalt are evaluated from the perspectives of Penetration, Ductility and Softening Point. Comparative study of performance grading of asphalts is performed through asphalt flexural creep stiffness test and asphalt rheological test. The experimental results show that RPRS modifier has good modification effects on these three asphalts, indicating that RPRS has universal applicability in different kinds of matrix asphalts. The DSR of RPRS modified asphalt can meet the requirements of all technical indicators of RPRS modified asphalt. The lowest temperature of RPRS modified asphalt is equal to the matrix asphalt; its performance at low temperature is the same to matrix asphalt. The highest temperature of RPRS modified asphalt is higher than that of the matrix asphalt by 2 to 3 degrees, and higher than SBS modified asphalt by 1 to 2 grades. The high temperature performances of RPRS modified asphalt are much better than the performances of matrix asphalt and SBS modified asphalt.

Keywords

RPRS modified asphalt, SBS modified asphalt, High and low temperature grade, Performance grading.