集料形态特征对集料-沥青黏附及水稳定性的影响
作者:
作者单位:

1.长安大学 公路学院,陕西 西安 710064;2.广东华路交通科技有限公司,广东 广州 510420

作者简介:

王志祥(1988—),男,河南周口人,长安大学博士生.E-mail:dgxiang2012@163.com

通讯作者:

张争奇(1967—),男,陕西扶风人,长安大学教授,博士生导师,博士.E-mail:z-zhengqi@126.com

中图分类号:

U416

基金项目:

广东省交通运输厅科技项目(科技-2016-02-004)


Effects of Aggregate Morphological Characteristics on Adhesion of Aggregate-Asphalt and Its Moisture Stability
Author:
Affiliation:

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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    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.

    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.

    表 6 不同集料形态特征及黏附性指标Table 6 Morphological characteristics and adhesion index of different aggregates
    表 1 沥青的性能Table 1 Properties of asphalts
    表 2 粗集料的技术指标Table 2 Technical specifications of coarse aggregates
    表 5 Ms、ΔS、TSR、SIP与SP的回归关系Table 5 Regression relation between Ms,ΔS,TSR,SIP and SP
    图1 集料-沥青的黏附率Fig.1 Bonding ratios of aggregate-asphalt
    图2 集料-沥青的水敏感系数Fig.2 Ms of aggregate-asphalt
    图3 不同来源的典型集料形态Fig.3 Typical aggregates characteristic of different sources
    图4 粗集料的形态特征Fig.4 Morphological characteristics of coarse aggregates
    图5 Ms、ΔS、TSR、SIP与GA的关系Fig.5 Relationships between Ms,ΔS,TSR,SIP and GA
    图6 Ms、ΔS、TSR、SIP与SP的关系Fig.6 Relationships between Ms,ΔS,TSR,SIP and SP
    图7 Ms、ΔS、TSR、SIP和TX的关系Fig.7 Correlation of parameters between Ms,ΔS,TSR,SIP and TX
    表 4 Ms、ΔS、TSR、SIP与GA的回归关系Table 4 Regression relation between Ms, ΔS,TSR,SIP and GA
    表 7 集料-沥青的黏附性及水稳定性与集料形态特性的关联系数Table 7 Correlation coefficient between aggregate asphalt adhesion, moisture stability and aggregate morphological characteristics
    表 3 AC-16级配Table 3 Gradation of AC-16
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王志祥,李建阁,张争奇.集料形态特征对集料-沥青黏附及水稳定性的影响[J].建筑材料学报,2021,24(5):1039-1047

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  • 收稿日期:2020-06-14
  • 最后修改日期:2020-07-14
  • 录用日期:2020-07-29
  • 在线发布日期: 2021-12-15
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