沥青胶浆-集料界面水盐侵蚀损伤与多因素影响规律研究  

Experimental Investigation of Moisture-salt Erosion and Multiple Factors Influence on Asphalt Mortar-Aggregate Interface

作　　者：朱燕丽 马川义 张吉哲 范秀泽 何亮[3] 姚占勇 ZHU Yanli;MA Chuanyi;ZHANG Jizhe;FAN Xiuze;HE Liang;YAO Zhanyong(School of Qilu Transportation,Shandong University,Jinan 250100,China;Shandong Hi-Speed Co.,Ltd.,Jinan 250098,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]山东大学齐鲁交通学院,济南250100 [2]山东高速集团有限公司,济南250098 [3]重庆交通大学土木工程学院,重庆400074

出　　处：《材料导报》2025年第6期91-98,共8页Materials Reports

基　　金：国家重点研发计划(2022YFB2603300,2022YFB2603303);国家自然科学基金(52278440)。

摘　　要：可溶盐长期侵蚀导致沥青胶浆-集料界面黏附性降低,是影响沿海地区沥青路面服役寿命的重要原因。为揭示可溶盐侵蚀的本质特征,本工作以沥青胶浆-集料界面为研究对象,开发了动水压力模拟试验装置,选用玄武岩、石灰岩和花岗岩集料,研究了不同水盐侵蚀工况下沥青胶浆-集料界面的强度衰减规律。采用灰色关联法探明了矿粉、集料的物理化学特性对界面强度的影响规律,并分析了沥青胶浆-集料界面水盐侵蚀损伤的关键影响因素。结果表明,浸水条件下沥青胶浆-集料界面强度逐渐降低,且可溶盐的存在提高了界面强度的衰减速率;动水压力工况下沥青胶浆-集料界面承受水压冲击与泵吸的双重作用,界面强度衰减最为显著。同时,干湿循环和冻融循环导致界面内应力增大,加速界面破坏。界面强度与不同因素的关联度排序为:孔隙体积>表观密度>比表面积>平均粒径>矿粉SiO_(2)含量>集料SiO_(2)含量,其中,孔隙体积、表观密度和比表面积是影响界面强度的关键因素。Long-term erosion by soluble salts result in a decrease in terms of the asphalt mortar-aggregate interface adhesion,and it is an important factor to the service life of asphalt pavement in coastal areas.In order to reveal the essential principles of the soluble salt erosion,this work focused on the adhesive behavior of asphalt mortar-aggregate interface under different conditions.A type of dynamic moisture pressure simulation test device was developed to study the strength attenuation behavior of asphalt mortar-aggregate interface under different erosion conditions.In addition,the influence of physical and chemical properties of mineral powders and aggregates on the interface strength was revealed by using grey correlation analysis,and the key factors which dominate the moisture and salt erosion damage of asphalt mortar-aggregate interface were ex-plored.The results indicated that the strength of asphalt mortar-aggregate interface decreases gradually under the water immersion,and the solu-ble salt promotes the attenuation rate of interface strength.Under dynamic moisture pressure erosion,the interface,subjected to repeated extru-sion and pumping action,leads to a significant decrease of adhesive strength.At the same time,the dry-wet and freeze-thaw conditions improved the internal stress of the mortar-aggregate interface which accelerated the interfacial failure.The correlation between interface strength and different factors are ranked as follows:void content>apparent density>specific surface area>average particle size>SiO_(2)content of mineral powder>SiO_(2)content of aggregate,the pore volume,apparent density and specific surface area are the key factors which affect the interfacial strength.

关 键 词：沥青胶浆 灰色关联 界面 水盐侵蚀 关键因素 

分 类 号：U414[交通运输工程—道路与铁道工程]