北美岩沥青改善混合料水稳定性的机理分析

Mechanism Analysis on Water Stability of Asphalt Mixtures Modified by Uintaite

为评价北美岩沥青对沥青混合料水稳定性的改善作用,通过扫描电子显微镜分析北美岩沥青附着高温集料表面的细观界面研究,采用表面自由能方法分析沥青与集料间的黏附性,以及进行岩沥青改性沥青混合料的水稳定性试验。结果表明:北美岩沥青能增强基质沥青的憎水性,有效改善沥青与集料的黏结能力,从而提高沥青混合料的高温稳定性以及显著改善沥青混合料的抗水损害性能。

Aiming to evaluate the improvements of water stability of asphalt mixtures modified by uintaite, SEM method is adopted to carry out micro interface research to the surface of high-tern binding aggregates of uintaite mastic asphalt, surface free-energy method is taken to analyze the adhesiveness between asphalt and aggregates and test on water stability of asphalt mixtures modified by uintaite mastic asphalt is undertaken. The experimental results suggest that uintaite mastic asphalt can： enhance asphalt hydrophobicity; effectively improve the adhesiveness between asphalt and aggregate; significantly improve the high temperature stability and anti-moisture damage performance of asphalt mixture.