环氧大豆油增容废旧橡塑改性沥青开发及性能研究

Develop and study on performance about ESO compatibilized crumb rubber-plastic modified asphalt

采用湿法制备废旧橡塑改性沥青,研究环氧大豆油掺量对改性沥青性能的影响。结果表明,随着环氧大豆油掺量增加,橡塑改性剂在沥青中的分散效果更好,改性沥青低温性能大幅度提升,储存稳定性大幅度提升。正交实验结果表明胶粉掺量是影响橡塑改性沥青性能的主要因素,其最佳制备方案为:橡胶粉25%,LDPE 4%,环氧大豆油2%,剪切时间1.5 h。芳烃油与环氧大豆油改善沥青相容性的增容效果相近,芳烃油对橡塑沥青低温性能的提升略优于环氧大豆油,但环氧大豆油成本更低、更环保,可替代芳烃油作为橡塑改性沥青的增容剂。

The wet process was used to prepare crumb rubber-plastic modified asphalt.The effect of the epoxy soybean oil(ESO) content on the properties of modified asphalt were studied.The ESO and aromatic oil were used as co-solvent respectively, the effects of the two in improving the compatibility of asphalt were compared and analyzed.The results showed that the addition of ESO improve the dispersion effect of rubber and plastic modifier in asphalt, and the low temperature properties of modified asphalt was greatly improved, and the storage stability is greatly improved.The orthogonal test results showed that the rubber powder content is the main factor affecting the properties of rubber-plastic modified asphalt.The best preparation process is: rubber powder 25%,LDPE 4%,ESO 2%,shearing time 1.5 h.In addition, under the optimal preparation process, the compatibilizing effects of the two compatibilizers were similar.Considering cost and environmental protection factors, epoxy soybean oil can replace aromatic oil as compatibilizing agent of rubber-plastic modified asphalt.