Study of Pavement Performance and Temperature Regulation Capacity of Asphalt Binders Modified with Dual-Phase-Change Materials

• Published in: Buildings (Basel) Vol. 13; no. 11; p. 2702
• Main Authors: Huo, Donghui, Hou, Debao, Zhang, Shuaixiang, Gao, Wei, Yu, Changchun, Jia, Ling, Chang, Baolin, Zhang, Rui, Guo, Meng
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.11.2023
• Subjects: Additives; Asphalt; Asphalt pavements; Binders; Binders (materials); Chemical reactions; Cracking (fracturing); Efficiency; Electron microscopes; Extreme values; Extreme weather; Fourier transforms; Fracture mechanics; Heat conductivity; Heat resistance; High temperature; Infrared spectroscopy; Laws, regulations and rules; Low temperature; modified asphalt; Molecular weight; Phase change materials; Phase transitions; Polyethylene glycol; Rheological properties; rheology; rutting resistance; Scanning electron microscopy; Seasonal variations; Simulation; Simulation methods; Solids; Temperature; Temperature control; Temperature effects; Thermal stability; China; Beijing China; United States > US
• ISSN: 2075-5309; 2075-5309
• DOI: 10.3390/buildings13112702

Due to the temperature changes caused by seasonal changes and extreme weather, asphalt pavement suffers from rutting, cracking, and other damage. With commonly used pavement additives, the high-temperature performance and the low-temperature performance of asphalt pavement show opposite trends, with related research endeavoring to find a balance between the two. In this study, a dual-phase-change material (DPCM) with both high- and low-temperature effects was prepared. The chemical stability and rheological properties of modified asphalt binders were characterized using Fourier transform infrared spectroscopy (FTIR) and a dynamic shear rheometer (DSR). Temperature control tests of the DPCM-modified asphalt binders were carried out with an indoor simulation device. The results show that the DPCMs could improve the rutting resistance of the asphalt binders at a high temperature, but the fatigue performance of the modified asphalt binder with different DPCM contents was reduced. The FTIR results showed that no chemical reaction occurred in the mixing of the asphalt binder and the DPCM. In the indoor simulation temperature control test, the 40% DPCM-content-modified asphalt binder reduced the high-temperature extreme value by 4.2 °C and increased the low-temperature extreme value by 2.5 °C, showing a good temperature control effect and practical application value.