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Volume 15
Issue 8
10.3390/coatings15080879
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Low-Temperature Performance and Thermal Control of Asphalt Modified with Microencapsulated Phase-Change Materials

by
Liming Zhang
1,
Junmao Wang
1,
Jinhua Wu
2,*,
Ran Zhang
2,
Yinchuan Guo
2,*,
Hongbo Shen
2,
Xinghua Liu
2 and
Kuncan Li
2
1
Shaanxi Sanqin Road & Bridge Co., Ltd., Xi’an Communication Investment Group Co., Ltd., Xi’an 710064, China
2
School of Highway, Chang’an University, Xi’an 710064, China
*
Authors to whom correspondence should be addressed.
Coatings 2025, 15(8), 879; https://doi.org/10.3390/coatings15080879 (registering DOI)
Submission received: 3 July 2025 / Accepted: 25 July 2025 / Published: 26 July 2025
(This article belongs to the Special Issue Synthesis and Application of Functional Polymer Coatings)
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Abstract

Conventional asphalt is prone to cracking in cold climates due to its poor flexibility and limited ability to regulate temperature. This study investigates the use of low-temperature microencapsulated phase-change materials (MPCMs) to improve both the thermal storage and low-temperature performance of asphalt. MPCMs were incorporated into asphalt through physical blending at various concentrations. The physical, thermal, and rheological properties of the asphalt were then systematically evaluated. Tests included penetration, softening point, ductility, thermogravimetric analysis (TGA), and dynamic shear rheometer (DSR). The addition of MPCMs increased penetration and ductility. It slightly reduced the softening point and viscosity. These changes suggest improved flexibility and workability at low temperatures. Rheological tests showed reductions in rutting and fatigue factors. This indicates better resistance to thermal and mechanical stresses. Bending Beam Rheometer (BBR) results further confirmed that MPCMs lowered creep stiffness and increased the m-value. These findings demonstrate improved crack resistance under cold conditions. Thermal cycling tests also showed that MPCMs delayed the cooling process and reduced temperature fluctuations. This highlights their potential to enhance both energy efficiency and the durability of asphalt pavements in cold regions.
Keywords: modified asphalt; microencapsulated phase-change materials; thermal regulation; rheological properties modified asphalt; microencapsulated phase-change materials; thermal regulation; rheological properties
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MDPI and ACS Style

Zhang, L.; Wang, J.; Wu, J.; Zhang, R.; Guo, Y.; Shen, H.; Liu, X.; Li, K. Low-Temperature Performance and Thermal Control of Asphalt Modified with Microencapsulated Phase-Change Materials. Coatings 2025, 15, 879. https://doi.org/10.3390/coatings15080879

AMA Style

Zhang L, Wang J, Wu J, Zhang R, Guo Y, Shen H, Liu X, Li K. Low-Temperature Performance and Thermal Control of Asphalt Modified with Microencapsulated Phase-Change Materials. Coatings. 2025; 15(8):879. https://doi.org/10.3390/coatings15080879

Chicago/Turabian Style

Zhang, Liming, Junmao Wang, Jinhua Wu, Ran Zhang, Yinchuan Guo, Hongbo Shen, Xinghua Liu, and Kuncan Li. 2025. "Low-Temperature Performance and Thermal Control of Asphalt Modified with Microencapsulated Phase-Change Materials" Coatings 15, no. 8: 879. https://doi.org/10.3390/coatings15080879

APA Style

Zhang, L., Wang, J., Wu, J., Zhang, R., Guo, Y., Shen, H., Liu, X., & Li, K. (2025). Low-Temperature Performance and Thermal Control of Asphalt Modified with Microencapsulated Phase-Change Materials. Coatings, 15(8), 879. https://doi.org/10.3390/coatings15080879

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