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<p>This research study presents an investigation into the performance of hot asphalt mixtures enhanced through the incorporation of a carbon nano-coating on micronized calcium carbonate (CCNC) powder as a modified filler. The primary aim is to enhance the properties of asphalt mixtures, specifically their resistance to fatigue. To assess the effect of filler size distribution, a detailed analysis was performed. The research utilized two primary methods, including laboratory evaluations such as Marshall stability, indirect tensile strength, resilient modulus and asphalt fatigue tests. Notable findings from particle size analysis revealed that calcium carbonate had a higher particle count than CCNC, which demonstrated a larger surface area despite its lower particle count. This is significant as it suggests the direct influence of filler characteristics on asphalt performance. Results indicated a considerable increase in Marshall stability for samples with carbon nano-filler, rising from 13.33 kN to 18.94 kN, showcasing enhanced structural integrity. Indirect tensile strength improved from 7.25 kN to 9.33 kN, reflecting increased tensile resistance. Additionally, Performance tests results exhibited improved complex shear modulus values across temperatures of 58&#xa0;°C, 64&#xa0;°C, and 70&#xa0;°C, confirming the benefits of the modifications. Overall, all enhancements positively affected viscosity values at all examined temperatures.</p>

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Effect of Structure, Size, Texture and Distribution of Nano-Coating on Micronized Calcium Carbonate Filler on Asphalt Mixture Performance

  • 期刊论文

  • 发表日期：

    2025年9月4日

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  • Mohammad Erfan Hoghoghi,
  • Mohammad Mehdi Khabiri,
  • Ahmad Mansourian

摘要

This research study presents an investigation into the performance of hot asphalt mixtures enhanced through the incorporation of a carbon nano-coating on micronized calcium carbonate (CCNC) powder as a modified filler. The primary aim is to enhance the properties of asphalt mixtures, specifically their resistance to fatigue. To assess the effect of filler size distribution, a detailed analysis was performed. The research utilized two primary methods, including laboratory evaluations such as Marshall stability, indirect tensile strength, resilient modulus and asphalt fatigue tests. Notable findings from particle size analysis revealed that calcium carbonate had a higher particle count than CCNC, which demonstrated a larger surface area despite its lower particle count. This is significant as it suggests the direct influence of filler characteristics on asphalt performance. Results indicated a considerable increase in Marshall stability for samples with carbon nano-filler, rising from 13.33 kN to 18.94 kN, showcasing enhanced structural integrity. Indirect tensile strength improved from 7.25 kN to 9.33 kN, reflecting increased tensile resistance. Additionally, Performance tests results exhibited improved complex shear modulus values across temperatures of 58 °C, 64 °C, and 70 °C, confirming the benefits of the modifications. Overall, all enhancements positively affected viscosity values at all examined temperatures.