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Review of Study on Performance of Interlayer Bonding of Concrete Bridge Pavements
LYU Songtao, YANG Dingling, LU Weiwei, and DUAN Haihui

Date posted: 2-5-2026
DOI: https://doi.org/10.14048/j.issn.1671-2579.2026.01.005

To clarify how interlayer bonding performance of cement concrete bridge decks affects the durability of bridge deck pavements and to identify the technical methods, research challenges, and future development trends for improving interlayer bonding performance, the research progress on the interlayer bonding performance of bridge deck pavements in China and abroad was reviewed. First, the characterization models and bond failure modes of the existing interlayer bonding state of bridge deck pavements were summarized, and the influencing factors of interlayer bonding performance and their working mechanisms were analyzed. Second, current evaluation methods and indices for interlayer bonding performance were discussed, and their limitations were pointed out. Finally, effective measures for improving interlayer bonding performance are outlined, and future research directions are proposed. The results show that the current interlayer contact models are relatively simple and have difficulty accurately characterizing complex interlayer bonding states. Temperature and interlayer interface roughness are the key factors affecting interlayer bonding performance. Existing interlayer bonding performance evaluation methods mostly rely on destructive shear tests, and the development of repeatable and rapid non-destructive testing technologies is an important trend. At present, there is no unified evaluation standard or specification for interlayer bonding performance at home and abroad, and the consistency among different evaluation indices is insufficient. It is recommended that the evaluation of interlayer bonding performance be incorporated into the bridge deck pavement design system to improve pavement durability and ensure the long-term service performance of bridges.

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Construction and Application of Knowledge Graph for Quality Management in Bridge Pile Engineering
FANG Xiaofeng, DONG Runhao, GU Yanke, and PAN Yanran

Date posted: 12-24-2025
DOI: https://doi.org/10.14048/j.issn.1671-2579.2025.06.031

To enhance the efficiency of quality management in bridge pile foundation construction,this study constructed a knowledge graph applicable to the construction field of bridge pile foundation engineering to enable systematic representation and intelligent organization of knowledge.A methodology combining top-down design and bottom-up design was adopted to develop a framework for constructing a knowledge graph for the quality management of bridge pile foundation construction that encompasses both the schema layer and the data layer.The schema layer was established through ontology modeling,clarifying the concept categories,hierarchical structure,and their attribute relationships.The data layer employed a bidirectional long short-term memory (BiLSTM ) network integrated with a conditional random field (CRF ) model to perform automatic extraction of entities and relationships from heterogeneous construction-related textual sources.They were stored and organized using the Neo 4j graph database.By using the construction of bored piles in a certain section of the Qingxin‒Huadu Expressway as a case study,the practical application effectiveness of the constructed knowledge graph was validated.Experimental results demonstrate that this knowledge graph can effectively organize and express the professional knowledge in the field of bridge pile foundation construction quality management;the accuracy rate of knowledge extraction based on the BiLSTM-CRF model is over 85%;the application of the knowledge graph has significantly improved the efficiency of construction quality management.

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Utilization Technology and Compaction Quality Control of Hardened Layer in Beam Yard of Rock-Filled Roadbed
CHENG Xiaoliang, TIAN Wendi, GAO Mengke, and ZHOU Xujia

Date posted: 12-24-2025
DOI: https://doi.org/10.14048/j.issn.1671-2579.2025.06.004

To investigate the utilization technology and compaction quality control of hardened layers in the beam yard of rock-filled roadbed,the optimization design and construction control methods for rock-filled roadbed under different conditions were proposed based on a highway project in Guangdong Province.When the elevation of the hardened layer was lower than the top surface elevation of the roadbed and the top surface bending and settlement value of the hardened layer was less than that of the rock-filled roadbed,the gravel material could be filled directly on the hardened layer to the top surface elevation of the roadbed,and acceptance and pavement design could be conducted according to the rock-filled roadbed with rigid sandwich.When the elevation of the hardened layer reached the elevation of the roadbed and the top surface bending and settlement value of the hardened layer was less than that of the rock-filled roadbed,the hardened layer can be used directly.The compaction quality of the roadbed under different construction and compaction schemes was analyzed based on the test section.The results show that the compaction process under strong vibration followed by weak vibration is better,and the settlement is basically in a stable state after five rolling passes with a 26 t roller.The empirical formula for the number of hammer blows and porosity was established based on heavy-duty power tapping.The rapid detection technology of compaction quality can be used for rapidly detecting compaction quality.The elevation of the top surface of the hardened layer in the beam yard of the physical project was remeasured,and the backcalculation study of the modulus of the hardened layer under different elevations was carried out.The rebound modulus of the hardened layer in the beam yard was jointly tested by the portable falling weight deflectometer (PFWD ) and the Beckman beam (BB) method.It is found that the backcalculation results of the PFWD and BB methods are significantly correlated.The backcalculation results can comprehensively evaluate the mechanical properties of the hardened layer in the beam yard and provide a parameter basis for the optimization of the pavement overlay structure.

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Study on Thermal Corrosion Resistance of Asphalt Modified by Phase Change Materials
LI Ping, WANG Zhijian, ZHENG Zhipeng, YI Chengxi, and ZHOU Dexiang

Date posted: 12-24-2025
DOI: https://doi.org/10.14048/j.issn.1671-2579.2025.06.008

In order to address the degradation issues faced by asphalt mixtures in airport runways and highway pavement,particularly focusing on thermal stability and thermal corrosion under high-temperature conditions,this paper investigated the impact of phase change materials (PCMs ) on the thermal corrosion resistance of asphalt.Three types of PCMs were utilized to jointly modify SBS-modified asphalt,and a series of tests were conducted to systematically analyze the performance of the modified asphalt,including thermogravimetric-differential scanning calorimetry (TG-DSC ) analysis,heat storage and release performance evaluation,laboratory thermal corrosion simulation of asphalt,three-index testing,and dynamic shear rheometer (DSR ) testing.The results indicate that PCMs can effectively regulate asphalt temperature and significantly mitigate the degradation of asphalt properties during thermal corrosion.Specifically,PCM A exhibits superior thermal stability and temperature regulation performance under high-temperature conditions,whereas PCM C is unsuitable for asphalt modification due to its inferior thermal stability.Additionally,the inclusion of PCMs improves the microstructure of asphalt,enhancing intermolecular interactions and deformation resistance and improving overall asphalt performance.This study provides a theoretical foundation for asphalt modification and thermal corrosion protection in airport pavement,demonstrating the efficacy of PCMs in enhancing asphalt pavement performance and extending service life,which holds significant implications for the sustainable development of the transportation sector.

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Review of Snow and Ice Melting Techniques for Road and Bridge in Cold Regions
TANG Liyun, SHAO Haitao, TANG Huaming, QIU Peiyong, DU Xiaoqi, ZHANG Lei, and PENG Hui

Date posted: 10-28-2024
DOI: https://doi.org/10.14048/j.issn.1671-2579.2024.05.003

Snow and ice melting of road and bridge surfaces is crucial for traffic safety，but current research on snow and ice melting techniques mainly focuses on engineering effects and technical evaluation，without the analysis and elaboration from the perspective of their mechanisms.To this end，based on the different mechanisms，this study divided snow and ice melting techniques into three types and summarized them：passive deicing，active deicing，and energy utilization deicing.This study systematically evaluated the advantages and disadvantages of traditional deicing methods such as deicing agents and mechanical deicing，analyzed two active deicing techniques，namely inhibitive freezing pavement and phase change material pavement，discussed the environmental-friendly method for road deicing by using phase change materials，and introduced the mechanisms of different energy utilization deicing techniques.This study analyzed the existing road deicing techniques，their actual application effects，and existing problems，to provide foundational support for the research of snow and ice melting on roads and bridges in cold regions.

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Review of design for combined base asphalt pavements with asphalt treated base and cement stabilized subbase
LI Xuelian, CHEN Peng, and CHA Xudong

Date posted: 11-24-2023
DOI: https://doi.org/10.14048/j.issn.1671-2579.2023.05.001

At present, there are great differences in the material composition, structure form, damage type, disease cause, design index, and design method of asphalt pavement with asphalt-treated base and cement-stabilized base in various countries. In view of this, this paper summarized the material type and structure form selected in China and abroad and analyzed the damage type and disease cause of this kind of asphalt pavement structure. This paper discussed the differences in the design methods of combined base asphalt pavement in different countries and summarized the disease control types and design indexes in different countries. On this basis, the reasonable material, structure combination, and design indexes of combined base asphalt pavements were recommended, which provided a reference for the design and application of this kind of asphalt pavement.

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A Review of Pavement Condition Evaluation Index Systems in China and Abroad
CHEN Leilei, YANG-LI Wenyun, LI Wei, Muhammad Thlha, and QIAN Zhendong

Date posted: 10-27-2025
DOI: https://doi.org/10.14048/j.issn.1671-2579.2025.05.007

With the increasingly complex operating conditions of roads, it has become a consensus among countries to improve the accuracy and systematicness of maintenance decisions. Since the pavement condition evaluation index system is the core tool supporting the judgment of schemes, its construction method and applicable ability directly affect the maintenance efficiency and resource allocation level. Based on the construction logic of the index model, the scoring mechanism of grade division, and the conditions of road grade adaptation, the characteristics of the evaluation index systems in typical countries in China and abroad were compared and sorted out. The internal causes affecting the characteristics of the index system were discussed from in-depth perspectives such as management concepts and institutional arrangements. Research findings show that some systems abroad emphasize hierarchical structural response or public experience, while in China, unified deployment and hierarchical downward management are emphasized. In China's case, the system has a certain foundation in terms of universality and standardization, but there are obvious shortcomings in threshold adjustment, scene adaptation, and system integration. Therefore, suggestions are proposed including setting dynamic thresholds in combination with maintenance goals, enhancing the adaptability to various types of road operating environments, and promoting the effective integration of evaluation results with the actual management process, which provides ideological support for the structural optimization and institutional coordination of the evaluation system.

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Long-Term Performance of Recycled Asphalt Mixtures with Various FRAP Contents
ZHANG Yongyuan, MENG Weihong, YANG Xin, WU Hao, ZHAN Yiqun, and XU Haoda

Date posted: 2-5-2026
DOI: https://doi.org/10.14048/j.issn.1671-2579.2026.01.010

At present, in the refined recycling and utilization of asphalt pavement, the utilization rate of fine recycled asphalt aggregates (FRAP) is much lower than that of coarse recycled asphalt aggregates (CRAP). This not only leads to resource waste but also limits the larger-scale application of RAP in recycled asphalt mixtures. Therefore, this study systematically investigated the impact of FRAP content on the long-term performance of recycled asphalt mixtures through the semi-circular tensile (SCT) tests. Based on the energy evolution laws of strain energy (elasticity and plasticity) and surface energy during material fracture processes, corresponding improvement measures were proposed according to the influence patterns identified. Furthermore, the feasibility of applying a large proportion of FRAP in recycled asphalt mixtures was demonstrated. The research results show that at low temperatures, as the FRAP content increased from 0% to 12%, the strain energy of the recycled asphalt mixture decreases by 39.2%. This indicates a sharp decline in the energy required for cracking, making it more susceptible to the formation of cracks. Additionally, the surface energy of the recycled asphalt mixture decreases by 71.3%, resulting in less energy required for crack propagation, which suggests that cracks are more likely to spread to a completely fractured state. Therefore, the maximum allowable FRAP content should be tested before use in extremely cold regions. At medium temperatures, with the increase in FRAP content, the strain energy of the recycled asphalt mixture drops sharply, with the majority of the energy being used for crack propagation. The cracking issue in recycled asphalt mixtures is more serious than that in conventional asphalt mixture. It is recommended to further reduce the grade of new asphalt or increase the content of regenerant while ensuring the high-temperature stability of the recycled asphalt mixture. The increase in FRAP content resulted in a further rise in the content of aged asphalt, leading to a mismatch in the deformation of the recycled asphalt binder and the stress concentration at the interface between the old and new asphalt. As a result, the fatigue life of the recycled asphalt mixture decreases by nearly 53% compared to that of mixtures without FRAP, and the rate of fatigue damage accumulation increases by 26.7%. The deterioration of fatigue performance is directly related to the increase in FRAP content. The use of a stepwise mixing method, where a portion of new asphalt is mixed with FRAP first, enhances the bonding performance between the new and old asphalt within the recycled asphalt mixture, resulting in a certain degree of improvement in the fracture fatigue performance of the recycled asphalt mixture.

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Analysis of Cooling Effect of Tunnel Surrounding Rock Construction Based on Spray Cooling
MENG Lingchen

Date posted: 2-5-2026
DOI: https://doi.org/10.14048/j.issn.1671-2579.2026.01.024

To study the cooling effect of spray cooling on the surrounding rock during the construction of an extra-long tunnel, based on the Zhongliangshan Tunnel Project, numerical simulations were performed to analyze the characteristics of average temperature variation in the tunnel under different spray rates, the evaporation efficiency and temperature drop characteristics of spray under different humidity levels, and the average temperature variation characteristics of the tunnel section under different spray positions. The measured values of the air temperature in the tunnel section were compared with the simulated values. The results indicate that:① With the increase of the spray rate, the average temperature in the tunnel decreases gradually; when the spray rate is 0.038 kg/s, the temperature drops by 2.75 ℃ compared with the initial temperature of the tunnel; ② As air humidity increases, the droplet evaporation rate decreases gradually; when air humidity is 12 g/kg, the droplet evaporation rate is the highest compared to other humidity levels; ③ At the same distance from the tunnel face, when the air moisture content is 12 g/kg, the temperature drop after spraying is the largest compared with other moisture contents, with a maximum temperature drop of 7.06 ℃; ④ There is no significant difference between the average measured air temperature and the average simulated value, suggesting that the measured and simulated air temperatures are basically consistent. In actual tunnel spray cooling projects, the spray cooling system should be closely combined with the tunnel ventilation system. The position and air volume of the vents should be reasonably set to promote good air convection, while controlling the humidity in the tunnel to improve the cooling effect.

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An Overview on the "ReusePotential" for Managing Shield Tunnel Spoilsas Resource
ZHANG Junhui, LI Hai, YANG Hao, WANG Hualei, and HAN Shanpeng

Date posted: 1-18-2024
DOI: https://doi.org/10.14048/j.issn.1671-2579.2022.06.001

In response to the challenges posed by massive shield muck production and inadequate disposal solutions, scholars have systematically reviewed the research on shield muck recycling technologies. Based on the challenges faced by the treatment of shield muck in China, this paper formed a systematic understanding of the classification of shield muck, the progress of resource recycling technologies, and typical applications, introduced the pretreatment methods of shield musk in China and abroad, and summarized the application scenarios and resource recycling technologies of shield musk in detail. Then, the paper analyzed the problems of shield musk recycling technologies, such as expensive curing agents, serious pollution, lack of pollutant analysis of roadbed backfill materials, low strength of recycled brick, and unconspicuous market benefit. The standardized technical process of “pre-classification treatment of shield musk, feasibility evaluation of recycling, resource recycling scenario, and performance and benefit evaluation” for shield musk recycling was constructed. The research directions of the development of shield musk curing agents and the migration of pollutants were emphasized. Finally, the development trend of shield musk recycling technologies was prospected.