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<p>Compaction temperature, traffic conditions, and moisture content play a crucial role in the performance of bituminous concrete, with rut depth serving as a key failure criterion for flexible pavements. The objective of the present study is to explore the effects of compaction temperature, traffic conditions and moisture levels on the volumetric and mechanical properties of bituminous concrete. The compaction temperatures investigated are 130&#xa0;°C, 140&#xa0;°C, and 150&#xa0;°C. Traffic conditions are quantified through varying levels of compaction. Viz. heavy traffic is represented by 75 blows, medium traffic by 50 blows, and light traffic by 35 blows. The moisture conditions examined include both dry and wet conditions. The volumetric properties evaluated include specific gravity, air voids, voids filled with bitumen (VFB), voids in mineral aggregate (VMA), stability and flow. The mechanical properties analyzed are indirect tensile strength (ITS), and rut depth. A statistical analysis is performed to evaluate the influence of compaction conditions and moisture content on these properties. The optimal compaction temperature ranges from 140 to 150&#xa0;°C is predicted through optimization analysis, considering different traffic and moisture conditions. The study further analyzes the behavior of rut depth in bituminous concrete, considering material properties, compaction conditions, and moisture conditions. The findings culminate in the formulation of both a performance-based rut depth model and a predictive model for rut depth estimation under different traffic and moisture conditions.</p>

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Exploring the Effects of Compaction Conditions and Moisture on Bituminous Concrete: A Statistical Approach to Develop Performance and Predictive Rut Depth Model

  • 期刊论文

  • 发表日期：

    2025年8月22日

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  • A. Jegan Bharath Kumar,
  • V. Sunitha,
  • R. T. Arjun Siva Rathan,
  • Samson Mathew

摘要

Compaction temperature, traffic conditions, and moisture content play a crucial role in the performance of bituminous concrete, with rut depth serving as a key failure criterion for flexible pavements. The objective of the present study is to explore the effects of compaction temperature, traffic conditions and moisture levels on the volumetric and mechanical properties of bituminous concrete. The compaction temperatures investigated are 130 °C, 140 °C, and 150 °C. Traffic conditions are quantified through varying levels of compaction. Viz. heavy traffic is represented by 75 blows, medium traffic by 50 blows, and light traffic by 35 blows. The moisture conditions examined include both dry and wet conditions. The volumetric properties evaluated include specific gravity, air voids, voids filled with bitumen (VFB), voids in mineral aggregate (VMA), stability and flow. The mechanical properties analyzed are indirect tensile strength (ITS), and rut depth. A statistical analysis is performed to evaluate the influence of compaction conditions and moisture content on these properties. The optimal compaction temperature ranges from 140 to 150 °C is predicted through optimization analysis, considering different traffic and moisture conditions. The study further analyzes the behavior of rut depth in bituminous concrete, considering material properties, compaction conditions, and moisture conditions. The findings culminate in the formulation of both a performance-based rut depth model and a predictive model for rut depth estimation under different traffic and moisture conditions.