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<p>Asphalt and bitumen are vital components in road construction, but their performance is highly susceptible to temperature fluctuations, leading to distresses such as rutting in summer and thermal cracking in winter. Phase change materials (PCMs), particularly in micro-encapsulated forms have emerged as a promising technology for the thermal regulation of asphalt pavements due to their latent heat storage capability. This paper provides a comprehensive and critical review of the integration of advanced PCMs, with a specific focus on organic solid–liquid and organic-organic eutectic types, into asphalt and bitumen. It systematically synthesizes current research on PCM types, their properties, and innovative incorporation methods such as direct mixing, encapsulation, and composite preparation. The review precisely analyzes the documented effects of PCMs on key asphalt properties, including rheological performance, temperature susceptibility, rutting resistance, and low-temperature cracking. Furthermore, it highlights significant findings, such as temperature reduction peaks of up to 13.9&#xa0;°C and improved thermal stability achieved through specific materials like polyurethane and polyethylene glycol. Finally, the prevailing technical and economic challenges such as long-term durability, compatibility, and cost and outlines clear future research directions are addressed to facilitate the development of smarter, more durable, and energy-conscious pavement infrastructures.</p>

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Enhancing asphalt and bitumen durability through advanced phase change materials

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Helga Zabardast,
  • Aziz Babapoor,
  • Zohreh Rahimi-Ahar,
  • Adrian Seyfaee

摘要

Asphalt and bitumen are vital components in road construction, but their performance is highly susceptible to temperature fluctuations, leading to distresses such as rutting in summer and thermal cracking in winter. Phase change materials (PCMs), particularly in micro-encapsulated forms have emerged as a promising technology for the thermal regulation of asphalt pavements due to their latent heat storage capability. This paper provides a comprehensive and critical review of the integration of advanced PCMs, with a specific focus on organic solid–liquid and organic-organic eutectic types, into asphalt and bitumen. It systematically synthesizes current research on PCM types, their properties, and innovative incorporation methods such as direct mixing, encapsulation, and composite preparation. The review precisely analyzes the documented effects of PCMs on key asphalt properties, including rheological performance, temperature susceptibility, rutting resistance, and low-temperature cracking. Furthermore, it highlights significant findings, such as temperature reduction peaks of up to 13.9 °C and improved thermal stability achieved through specific materials like polyurethane and polyethylene glycol. Finally, the prevailing technical and economic challenges such as long-term durability, compatibility, and cost and outlines clear future research directions are addressed to facilitate the development of smarter, more durable, and energy-conscious pavement infrastructures.