集料形态特征对沥青混合料性能影响规律的研究进展  

Review on the Characterization of Aggregate Morphology and Its Influence on Asphalt Mixture Properties

作　　者：王凤[1] 肖月[1] 崔培德 磨炼同[1] 方明镜 WANG Feng;XIAO Yue;CUI Peide;MO Liantong;FANG Mingjing(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;School of Transportation,Southeast University,Nanjing 211189,China;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]东南大学交通学院,南京211189 [3]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《材料导报》2022年第17期91-103,共13页Materials Reports

基　　金：国家自然科学基金(U1733121)。

摘　　要：集料是公路工程中需求量最大的原材料。宏观形状和微观纹理等形态特征,是工程集料最重要的物理性质之一,直接决定了沥青混合料骨架互锁结构和内摩擦力的传递路径与分布,对沥青混合料性能及其最终的路面服役行为影响显著。集料形态特征的精确表征对提升沥青混合料性能和路面服役状态及延长寿命意义重大。目前,表征集料形态特征的方法种类繁多,但缺乏系统的分类和比较。此外,集料的形态特征对沥青混合料性能的具体影响规律尚缺乏详细、完整的归纳和汇总。本文概述了当前国内外开展集料形态特征研究时采用的主要表征参数(以纵横比、矩形度、Form2D、球形度、针片状和形状因子为主的宏观形状特征,以棱角性、分形维数、微观纹理系数等为主的表面纹理特征)及其对应的测试-计算方法,并归纳了各形态特征参数的物理意义及其测试方法与适用条件等。同时,总结分析了集料宏观形状、细观棱角和微观纹理参数对沥青混合料性能的影响规律,并对目前用虚拟仿真计算集料形态与混合料性能进行了综述,以期为公路工程设计中集料的优选和沥青混合料的性能优化提供理论指导和设计参考。最后,针对未来对长寿命沥青路面及沥青混合料智能设计的高需求,对未来围绕沥青混合料中集料形态特征研究提出了展望。Aggregate ranks the biggest amount of needing materials in road engineering.Its morphology,mainly macro shapes and micro-texture,is one of the most important physical properties of aggregates,which directly determines the interlocking of the asphalt mixture skeleton as well as the transmission path and distribution of internal friction.And it has a significant influence on the properties and service behavior of asphalt mixture.The accurate evaluation of the morphological characteristics of aggregates is of great significance to enhance the service performance of asphalt mixture and prolong the service life of asphalt pavement.At present,there are many kinds of methods to characterize aggregate morphologies,while systematic classification and comparison are absent.Meanwhile,the impact of aggregate morphologies on the service performance of asphalt mixture lacks a detailed and complete summary.This paper summarizes the comprehensive testing and analysis methods of aggregate morphologies(macro shapes mainly include aspect ratio,rectangularity,Form2D,sphericity,flat and elongated and shape factor,and micro textures mainly include angularity,fractal dimension and micro-texture coefficient)at home and abroad,and the correponding test-calculation methods.The physical meaning of each morphological characteristic parameter and applicable conditions of its testing method are summarized.Furthermore,the effects of macro-shape,meso-angularity and micro-texture on service performance of asphalt mixture are analyzed.And the aggregate morphologies based on computer science are summarized,in order to provide engineering guidance and design reference for aggregate selection and performance optimization of asphalt mixture.Finally,in the view of the high demand for long-life pavement and smart design of asphalt mixture in the future,further study on the aggregate morphological characteristics in asphalt mixture are prospected.

关 键 词：沥青路面 集料形态 棱角性 纹理 路用性能 抗滑性能 

分 类 号：U414[交通运输工程—道路与铁道工程] TB332[一般工业技术—材料科学与工程]