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Determination of the Friction Coefficients of Icy Pavements Under Different Amounts of Snowfall
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Temperature Gradient Characteristics of Rubber-Modified Asphalt Pavement Under Dramatic Cooling-Heating Cycles
Meiyan Huang1, Jianguo Wei1,2, Ping Li1,2
1School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410114, China.
Materials (Basel, Switzerland)
|December 17, 2024
Summary
Frequent rainfall and high temperatures significantly impact rubber-modified pavement temperature fields. Cyclic temperature changes occur 30 mm below the surface, with cycle number and temperature difference being key factors.
Area of Science:
- Civil Engineering
- Materials Science
- Environmental Science
Background:
- Climatic factors cause significant pavement temperature fluctuations, leading to fatigue damage from thermal stress.
- The depth of thermal influence in pavements is a critical factor in damage assessment.
Purpose of the Study:
- To investigate the influence range and variation patterns of rubber-modified pavement temperature fields.
- To understand pavement temperature evolution under conditions of frequent rainfall and high temperatures.
Main Methods:
- Utilized indoor tests and a finite element model to simulate pavement temperature changes.
- Employed single-factor sensitivity analysis to determine the evolution laws of pavement temperature fields.
- Applied Pearson correlation analysis to assess the influence of various factors on the pavement temperature field.
Main Results:
- Road surface temperature dropped by 20°C to 40°C during sudden rainfall, depending on initial asphalt mixture temperatures.
- Cyclic temperature variations were observed 30 mm beneath the surface due to repeated rainfall after high temperatures.
- Pavement temperature differences increased linearly with significant temperature fluctuations; changes stabilized after approximately 30 cycles.
Conclusions:
- The number of thermal cycles and the magnitude of temperature differences are primary drivers of pavement temperature field changes.
- Understanding these thermal dynamics is crucial for predicting and mitigating fatigue damage in rubber-modified pavements.
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