| 摘要: |
| 为评价集料形态特征对集料-沥青黏附性及其体系水稳定性的影响，提出了一种定量测试集料-沥青黏附性的新方法.借助集料图像测量系统（AIMS） 测试了5种集料的形态特征，并对不同形态集料沥青混合料的水稳定性进行评价，建立了集料形态特征与集料-沥青黏附性及水稳定性的关系，同时基于灰色关联法分析了集料形态特征对集料-沥青黏附性及水稳定性的影响排序.结果表明：提出的集料-沥青黏附性定量测试方法简单、可靠；沥青混合料水稳定性最佳的棱角性为2 500~3 000，球度为0.65~0.75；随着集料表面纹理的增大，沥青混合料的水稳定性增强；集料表面纹理对集料-沥青黏附性的影响最大，棱角性对沥青混合料浸水飞散损失指标的影响最大，球度对沥青混合料冻融劈裂强度比、浸水车辙变形拐点指标的影响最大. |
| 关键词: 集料形态特征 黏附性 水稳定性 棱角性 球度 表面纹理 |
| DOI：10.3969/j.issn.1007-9629.2021.05.019 |
| 分类号:U416 |
| 基金项目:广东省交通运输厅科技项目（科技-2016-02-004） |
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| Effects of Aggregate Morphological Characteristics on Adhesion of Aggregate-Asphalt and Its Moisture Stability |
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WANG Zhixiang1,2, LI Jiange1, ZHANG Zhengqi1
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1.School of Highway， Chang’an University， Xi’an 710064， China;2.Guangdong Hualu Transportation Technology Co.， Ltd.， Guangzhou 510420， China
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| Abstract: |
| To evaluate the influence of aggregate morphological characteristic on aggregate-asphalt adhesion and its moisture stability， a new method of quantitative aggregate-asphalt adhesion test was proposed. The morphological characteristics of aggregates from five sources were tested by aggregate image measurement system （AIMS）， and the moisture stability of asphalt mixture with different aggregate morphological characteristics was evaluated. The relation of aggregate morphological characteristics to adhesion of aggregate-asphalt and its moisture stability was established. The influence of aggregate morphological characteristics on the adhesion and moisture stability was analyzed based on the grey correlation method. The results show that the proposed quantitative test method of aggregate-asphalt adhesion is simple and reliable. The moisture stability of asphalt mixture is best when the aggregates morphological characteristics have best angularity in the range of 2 500-3 000 and the best sphericity in the range of 0.65-0.75. With the increase of surface texture， the moisture stability of asphalt mixture is enhanced. The surface texture， angularity and sphericity have the greatest influence on aggregate-asphalt adhesion， water immersion flying loss， freeze-thaw splitting strength ratio and stripping inflection point， respectively. |
| Key words: aggregate morphological characteristic adhesion moisture stability angularity sphericity surface texture |
