基于多尺度分析的沥青粘结剂大气组分老化行为研究

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-05-26 DOI:10.1016/j.conbuildmat.2025.141948

Ziqi Chen, Tengjiang Yu, Fushou Zhao, Hao Liu, Mingbin Wang

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引用次数: 0

摘要

为了研究大气组分（氮、氧、二氧化碳、惰性气体）对沥青粘结剂性能劣化的影响，采用大气组分老化试验、扫描电镜（SEM）试验和原子力显微镜（AFM）试验相结合的方法，揭示了不同大气组分作用下沥青粘结剂的多尺度老化行为。首先，设计大气组分老化试验，在纯氮、氧气、二氧化碳和惰性气体（氦气）条件下获得老化后的沥青粘结剂样品，并比较其宏观形态特征。随后，通过沥青扫描电镜测试分析了不同大气组分对沥青粘结剂的微观影响，揭示了其微观形貌的演化机理。最后，通过沥青原子力显微镜（AFM）测试，对不同大气成分的老化沥青粘结剂的纳米特性进行了分析和比较，并探讨了表面相互作用的纳米机理。结果表明，不同大气成分对沥青粘结剂的老化行为有不同的影响，其中氧的贡献更为明显，而氦则起延迟作用。表面宏观形貌和微观形貌主要体现在褶皱结构和裂纹结构的形态和分布特征上，纳米形貌主要表现在“蜜蜂结构”上。本研究为研发适合特定区域气候的抗老化沥青粘结剂奠定了基础，具有一定的理论和工程研究意义。

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Research on atmospheric components aging behavior of asphalt binders based on multi-scale analysis

To investigate the contribution of atmospheric components (nitrogen, oxygen, carbon dioxide, noble gases) to the deterioration of asphalt binder properties, the atmospheric components aging tests, scanning electron microscope (SEM) tests and atomic force microscope (AFM) tests were combined to reveal the multi-scale aging behavior of asphalt binders subjected to different atmospheric components. Firstly, the atmospheric components aging test was designed to obtain the aged asphalt binder samples under the conditions of pure nitrogen, oxygen, carbon dioxide and noble gases (helium), and to compare their macro morphological characteristics. Subsequently, the micro effects of different atmospheric components on asphalt binder were analyzed by asphalt SEM testing, and the evolution mechanism of its micro-morphology was revealed. Finally, the nano characteristics of aged asphalt binder with different atmospheric components were analyzed and compared by asphalt AFM testing, and the nano mechanism of surface interaction was explored. Results show that different atmospheric components have different effects on the aging behavior of asphalt binders, in which the contribution of oxygen is more obvious, while helium plays a delayed effect. The surface macro-morphology and micro-morphology can be mainly reflected in the morphology and distribution characteristics of fold structures and crack structures, and the nano-morphology can be mainly displayed in the "bee structure". The study lays a foundation for the research and development of anti-aging asphalt binder suitable for specific regional climate, and has certain theoretical and engineering research significance.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.