Multi-physical modeling and automatic network-level prediction of the oxidation aging of in-situ asphalt pavements

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Construction and Building Materials Pub Date : 2024-11-15 DOI:10.1016/j.conbuildmat.2024.139209

Jitong Ding , Jiwang Jiang , Guoyang Lu , Jingling Wang , Fujian Ni

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Abstract

Aging increases the stiffness and brittleness of asphalt mixtures, making it crucial to predict changes in mixture properties over time. This study aims to investigate oxidation reactions in the wearing course of asphalt pavement under oxygen diffusion. A multi-physics model, incorporating modules for thermal conductivity, oxygen diffusion, and oxidation reactions, was developed to analyze the formation of partial oxidation products in asphalt mortar. The model was optimized and validated using field data from ten road sections of Jiangsu highways. The impact of service time, location, and mixture type on aging was examined, allowing for network-level predictions of oxidation aging. Results indicate that as service time increases, the aging gradient between the surface and bottom of the wearing course becomes more pronounced. After 15 years, the surface carbonyl index increases to 330–350, while the bottom index reaches 150–180. This variation is influenced by climatic conditions and changes in mortar film thickness. These findings enhance the understanding of factors influencing field aging and improve predictions under varied conditions.

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现浇沥青路面氧化老化的多物理模型和网络级自动预测

老化会增加沥青混合料的刚度和脆性，因此预测混合料性能随时间的变化至关重要。本研究旨在研究氧扩散条件下沥青路面磨耗层的氧化反应。研究人员开发了一个多物理场模型，其中包含导热、氧扩散和氧化反应模块，用于分析沥青砂浆中部分氧化产物的形成。利用江苏省高速公路十个路段的现场数据对模型进行了优化和验证。研究了使用时间、地点和混合料类型对老化的影响，从而对氧化老化进行了网络级预测。结果表明，随着使用时间的延长，磨耗层表面和底部之间的老化梯度变得更加明显。15 年后，表面的羰基指数增加到 330-350，而底部的指数则达到 150-180。这种变化受气候条件和砂浆膜厚度变化的影响。这些发现加深了人们对现场老化影响因素的理解，并改进了在不同条件下的预测。

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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.