铸造废砂／废地膜／粘附土三元复合体系的研究

通过X射线衍射分析、红外光谱分析、热分析、电镜及能谱分析、图像分析，可以判断废旧地膜上粘附土的主要矿物质是结晶二氧化硅（粉粒级石英），它们与聚合物基废弃物复合材料中作为填料的铸造石英砂的性状类同。废旧地膜可以不经清洗，直接与铸造废砂制备复合材料，这可大大降低复合材料的加工成本。这种复合材料实际上是由基体PE、粘附土中大量的SiO2和铸造石英砂SiO2组成的三元复合体系。

Study on the ternary compound system of foundry used sand,waste mulching film and soil adhered on it

Through X-ray diffraction analysis, infrared spectral analysis, thermal analysis, scanning electron microscopy and energy dispersion X-ray analysis, as well as image analysis, it could determine that the main mineral substance of the soil adhered to waste mulching films is crystalline silica （quartz in particle level）, which has characters similar to the casting quartz sand as the filling material in waste polymer matrix composite materials. Waste mulching films can, without cleaning, directly be used to make the composite material with casting waste sand, which would greatly decrease the processing cost of the composite material. This material actually is a ternary compound system composing matrix of PE, plentiful SiO2 in the adhered soil and SiO2 of the casting quartz sand.