玻璃沥青混凝土阻热降温性能

Thermal Resistance and Cooling Performance of Glass Asphalt Concrete

为了有效再利用废弃玻璃,结合玻璃具有较低导热系数这一特性,将废旧玻璃破碎成1.18、2.36 mm的玻璃集料替代矿质集料,制备而成玻璃沥青混合料。基于平板法和傅里叶热传导原理,研究设计了室内平板导热试验装置,用于检验玻璃沥青混合料的导热系数。试验结果表明:随着玻璃集料掺量的增大,玻璃沥青混合料的导热系数降低;玻璃沥青混合料在高温环境下的阻热效果更明显。模型计算表明:使用玻璃沥青混凝土可降低路表温度,因此,玻璃沥青混凝土是一种绿色环保材料,具有较好的阻热性能,可以在一定程度上减轻实际工程中由于高温导致的车辙问题。

In order to reuse the waste glass efficiently,considering the low thermal conductivity of glass,glass asphalt mixes were prepared by crushing waste glass into 1.18、2.36 mm glass aggregates instead of mineral aggregates.Based on the flat plate method and Fourier heat conduction principle,an indoor flat plate thermal conductivity test device was studied and designed to examine the thermal conductivity of glass asphalt mixture.The test results show that the thermal conductivity of glass asphalt mixture decreases with the increase of glass aggregate admixture.The thermal barrier effect of glass asphalt mixture is more obvious in high temperature environment.The model calculation indicates that the use of glass asphalt concrete can reduce the road surface temperature,therefore,glass asphalt concrete is a green material with good thermal resistance,which can alleviate the rutting problem caused by high temperature in the actual project to a certain extent.