混凝土路面具有显著的热红外暴露征候,尚没有行之有效的伪装手段.采用混入高导热材料,涂覆高反射率材料和添加相变微胶囊的方法,改进混凝土的热特性.建立了一维热传递数理模型,模拟了相变混凝土的热行为特性,优化出混凝土路面中的高导热材料和相变材料的最佳配比.实验结果证明了相变混凝土可以有效降低混凝土路面的温度,达到分割目标热图中规则外形的目的,实现了红外热图中混凝土路面与周围植被的较好融合.%As a result of peculiar thermal infrared exposing signature of concrete, effective infrared camouflage methods for pavement have not been reported yet. Several methods were used to modify the thermal characteristics of concrete, which include mixing high heat-transfer material, adding microencapsula-ted phase change material ( PCMs) and spraying high reflective coating. The obtained product is called phase-changing concrete. A one-dimensional thermo-physical model was used to investigate the thermal characteristics of the phase-changing concrete. The optimized volume fractions of high heat-transfer materials and PCMs were obtained based on the model. Experiment investigations are also carried out, which proved that the added PCMs can effectively descend the temperature of concrete pavement and the thermal image is also disrupted significantly. The time-temperate curve of phase-changing concrete is consistent with that of surrounding background vegetation.
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