Selection method of base asphalt for rubber asphalt based on grey relational analysis

A selection method of base asphalt for rubber asphalt based on grey relational analysis, comprising the following steps:

• determining factors affecting the performance of rubber asphalt and rubber asphalt performance evaluation indicators, wherein the factors affecting the performance of rubber asphalt comprise a saturate mass percentage, an aromatic mass percentage, a resin mass percentage, an asphaltene mass percentage, a sum of saturate and aromatic mass percentages and a sum of resin and asphaltene mass percentages in base asphalt;
• and the rubber asphalt performance evaluation indicators comprise a softening point, penetration, ductility at 5° C., viscosity at 180° C. and 48-h segregation softening point difference of rubber asphalt;
• ranking the factors affecting the performance of rubber asphalt according to respective affecting degrees thereof on each of the rubber asphalt performance evaluation indicators by using a grey relational method;
• and
• determining affecting factors of chemical components of base asphalt to the performance of rubber asphalt according to the results of ranking with respect to affecting degree, and selecting base asphalt according to the affecting factors.