Effect of chloride corrosion on the adhesion performance of asphalt aggregate interface

IF 3.2 3区 材料科学 Q2 ENGINEERING, CHEMICAL
FuBing Tan , Jian Qin , Fanhua Zeng , Tingting Nong , Xingming Lin , Huangsheng Li
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Abstract

To investigate the deterioration of the interfacial adhesion performance between asphalt and aggregate under chloride erosion environment, the effects of chloride erosion on the interfacial adhesion performance between 70# asphalt, SBS modified asphalt, and Trinidad Lake asphalt (TLA) modified asphalt and aggregate were simulated by changing the chloride concentration, time, and temperature under three chloride erosion conditions. Firstly, the basic performance indicators of asphalt before and after erosion were tested, and a self prepared asphalt aggregate interface specimen was developed. The adhesion performance and adhesion work of the asphalt aggregate interface were tested through pull-out tests. Finally, the anti splitting performance of the asphalt mixture after chloride salt erosion was tested. Research has found that with the increase of chloride corrosion conditions, the penetration of the three types of asphalt gradually decreases, while the softening point gradually increases. The three chloride corrosion conditions are all linearly related to the tensile stress intensity and tensile strain height of the asphalt aggregate specimen interface. The tensile stress intensity decreases linearly, while the tensile strain increases linearly, and the adhesion work between asphalt and aggregate interface gradually decreases. The splitting tensile strength of the three types of asphalt mixtures gradually decreases. The results indicate that chloride concentration, erosion temperature, and time can all degrade the interfacial adhesion performance between asphalt and aggregate. TLA modified asphalt can maintain good adhesion performance, followed by SBS, and the interface adhesion performance of 70# base asphalt deteriorates the most severely.

Abstract Image

氯化物腐蚀对沥青集料界面粘结性能的影响
为了研究氯离子侵蚀环境下沥青与骨料界面粘附性能的恶化情况,通过改变氯离子浓度、时间和温度,模拟氯离子侵蚀对70#沥青、SBS改性沥青和特立尼达湖沥青(TLA)改性沥青与骨料界面粘附性能的影响。首先,对侵蚀前后沥青的基本性能指标进行了测试,并研制了自制沥青集料界面试件。通过拉拔试验,对沥青集料界面的粘接性能和粘接工作进行了测试。最后,对氯盐侵蚀后沥青混合料的抗裂性能进行了测试。研究发现,随着氯化物腐蚀条件的增加,三种沥青的渗透度逐渐降低,软化点逐渐增大。三种氯腐蚀状态均与沥青集料试件界面拉应力强度和拉应变高度呈线性相关。拉应力强度线性减小,拉应变线性增大,沥青与骨料界面粘结功逐渐减小。三种沥青混合料的劈裂抗拉强度逐渐降低。结果表明,氯离子浓度、侵蚀温度和侵蚀时间均会降低沥青与骨料的界面粘附性能。TLA改性沥青能保持较好的粘接性能,其次是SBS,其中70#基层沥青的界面粘接性能恶化最严重。
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来源期刊
International Journal of Adhesion and Adhesives
International Journal of Adhesion and Adhesives 工程技术-材料科学:综合
CiteScore
6.90
自引率
8.80%
发文量
200
审稿时长
8.3 months
期刊介绍: The International Journal of Adhesion and Adhesives draws together the many aspects of the science and technology of adhesive materials, from fundamental research and development work to industrial applications. Subject areas covered include: interfacial interactions, surface chemistry, methods of testing, accumulation of test data on physical and mechanical properties, environmental effects, new adhesive materials, sealants, design of bonded joints, and manufacturing technology.
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