Experimental Study on Macro-Mesoscopic Components and Indexes of Buton Gilsonite-Modified Asphalt

Abstract EN

Gilsonite-modified asphalt is one of the hotspots of high-performance modified asphalt research.

In this paper, the macroscopic composition and index of gilsonite-modified asphalt are analyzed; gilsonite, matrix asphalt, and modified asphalt with different gilsonite contents were analyzed by high- and low-temperature performance tests, antiaging performance test, four-component test, infrared spectral test, and SEM electroscope scanning test.

The results showed that the content of aromatic fraction, colloid, and asphaltene in Buton gilsonite was 3.1%, 95.6%, and 32.9% higher than that of matrix asphalt, respectively.

The gilsonite-modified asphalt had better high-temperature performance and antiaging performance.

The optimum amount of gilsonite in gilsonite-modified asphalt should be 9%∼15%.

The pore structure of gilsonite is more distributed, the surface is rough, which can produce greater cohesion with matrix asphalt, and the compatibility is better.