关键词: 道路工程;复合定形相变材料;低温抗裂性;水稳定性;高温稳定性

Abstract: To investigate the road performance of asphalt mixture mixed with the composite shape-stabilized phase change materials, the composite shape-stabilized phase change material used for asphalt pavement was prepared.The phase change temperature, phase enthalpy and other thermo-physical properties of the phase change materials were measured.The Marshall stability test, low-temperature bending test, freeze-thaw splitting test and rutting test were used to analyze the influences of composite shape-stabilized phase change materials on the performance of asphalt mixture.Results show that the optimum asphalt amount of asphalt mixture mixed with and without the composite shape-stabilized phase change materials have small difference.Composite shape-stabilized phase change material could significantly improve the low temperature cracking performance and water stability of asphalt mixture.The dynamic stability of the matrix asphalt mixture was much higher than that of the asphalt mixture mixed with composite shape-stabilized phase change material.And the dynamic stability was decreased with increased composite shape-stabilized phase change material content.A dosage of 0.3％ of the phase change materials is recommended in this research considering the road performance of the asphalt mixture mixed with composite shape-stabilized phase change materials comprehensively.

Key words: road engineering;composite shape-stabilized phase change material;low temperature anti-cracking performance;water stability;high temperature stability