稳定型废旧橡塑改性沥青老化性能及预估

Aging Performance and Prediction of Stabilized Waste Rubber-Plastic Polymer Alloy Modified Asphalt

为了探究稳定型废旧橡塑改性沥青的抗老化性能,采用不同掺量的改性剂制备了多种橡塑改性沥青,并运用薄膜加热试验(TFOT)分析了这些沥青老化后的性能变化,建立了一套预估老化性能的模型,并将其与稳定型废旧橡胶改性沥青进行了性能对比。分析表明,添加橡塑改性剂显著提升了沥青的抗老化能力,但表征橡塑改性沥青抗老化能力的指标与改性剂掺量的相关性并不明显,所建立的橡塑改性沥青老化性能预估模型中,除了10℃延度预估模型外,其他模型的预测误差均小于10%,显示出比较高的预测准确性。

In order to investigate the anti-aging performance of stabilized waste rubber-plastic polymer alloy modified asphalt,a variety of rubber-plastic modified asphalt was prepared by using different dosages of modifiers,and the changes in the performance of these asphalt after aging were analyzed by using thin film oven test(TFOT),and a set of models was established to predict the aging performance.The performance of these asphalts was compared with that of stabilized waste rubber-modified asphalt.The analysis showed that the addition of rubber-plastic modifier significantly improved the aging resistance of asphalt.However,the indexes characterizing the aging resistance of rubber-plastic modified asphalt and the correlation between the amount of modifier dosing is not obvious,the established rubber-plastic modified asphalt aging performance prediction model,in addition to the 10℃ductility prediction model,theother modelsof theprediction error are smaller,showing a relatively high prediction accuracy.