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

Abstract

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.

Karet Alam Sebagai Peningkat Masa Jalan Aspal

“…Meningkatnya permintaan aspal dari turunan minyak bumi (Yang et al, 2019) (Ngii et al, 2022 seiring dengan pertambahan ruas jalan merupakan permasalahan yang cukup signifikan bagi ketersediaan aspal. Cadangan aspal dari minyak bumi terus menurun dan tidak berkelanjutan (Ingrassia et al, 2019) (Refiyanni & azwanda, 2020;Khurshid & Kumar, 2021).…”

“…Aspal konvensional berasal minyak bumi (Yang et al, 2019) yang keberadaannya tidak dapat diperbaharui. Penggunaan aspal dari minyak bumi dalam negeri saat ini mencapai 1,6 juta ton/tahun (Kementerian Perindustrian, 2017).…”