ABSTRACT

Asphalt binder and mineral filler are mixed together to bond fine and coarse aggregates of asphalt mixture. The interaction between asphalt and filler plays an important role in deciding the rheological responses of asphalt mixture. Significant efforts have been devoted over the years to studying the asphalt–filler interaction in terms of mechanisms, evaluation methods and influence factors. The interaction mechanisms of filler particles to asphalt have been analysed from various perspectives, including rheological test, microstructural change and molecular dynamic simulation. This paper systematically reviews current evidence to thoroughly reflect the asphalt–filler interaction mechanism. Based on different theoretical models and rheological parameters, several evaluation indices have been proposed in recent decades. This paper also summarises the effectiveness and sensitiveness of these indices to measuring the asphalt–filler interaction ability. Additionally, the influences of internal and external factors on asphalt–filler interaction ability are comprehensively reviewed, aiming to shed light on its fundamental mechanisms to enhance asphalt mixture design. The internal factors refer to the characteristics of asphalt and filler particles, while the external factors include temperature, loading frequency, asphalt thermal oxidation and water.

摘要

沥青结合料和矿物填料混合在一起，以粘合沥青混合料的细集料和粗集料。沥青与填料之间的相互作用对决定沥青混合料的流变响应起着重要作用。多年来，人们一直致力于研究沥青-填料相互作用的机理、评价方法和影响因素。从流变试验、微观结构变化和分子动力学模拟等多个角度分析了填料颗粒与沥青的相互作用机理。本文系统地回顾了当前的证据，以彻底反映沥青-填料的相互作用机制。近几十年来，基于不同的理论模型和流变学参数，提出了多种评价指标。本文还总结了这些指标对测量沥青-填料相互作用能力的有效性和敏感性。此外，全面回顾了内部和外部因素对沥青-填料相互作用能力的影响，旨在阐明其改善沥青混合料设计的基本机制。内部因素是指沥青和填料颗粒的特性，而外部因素包括温度、加载频率、沥青热氧化和水分。