Performance evaluation of composite phase change materials and phase change modified asphalt for road use
Asphalt pavement will produce high-temperature rutting,low-temperature cracking and other diseases in the extreme temperature environment,and the development of composite phase change materials is of great significance to improve the temperature regulation performance of asphalt,to further advance the development of thermoregulation technology for asphalt pavements and to improve the life cycle of phase change materials in asphalt.First,the composition of composite phase change materials for road use was introduced.Second,the preparation process of composite phase change materials was compared.On this basis,the discussion was mainly based on the temperature-regulating performance of asphalt pavement and the influence caused by the blending of composite phase change materials on asphalt pavement.It was sorted out that the carrier was a key factor in determining the thermal conductivity and durability of composite phase change materials.Therefore,after determining the composite phase change materials carrier,it was crucial to choose the appropriate preparation method for different carrier materials.The use of carbon-based materials with high thermal conductivity in the carrier can not only improve the leakage resistance of composite phase change materials,but also improve the thermal conductivity of composite phase change materials.At present,although composite phase change materials had certain temperature regulation performance in asphalt,they still had the shortcomings of low heat storage capacity and insufficient leakage resistance.In the future,on the basis of clarifying the compatibility of composite phase change materials with asphalt,more targeted composite phase change materials for road use can be developed,and then a unified phase transformation evaluation standard and method can be formulated.
国家科技期刊平台
NSTL
万方数据
