环境因素组合作用下TOR橡胶沥青老化试验研究

摘要

为探究自然环境因素对维他连接剂(Trans-polyoctenamer rubber reactive modifier,TOR)橡胶沥青老化的影响,设计热、氧、水、光四种环境因素组合对TOR橡胶沥青进行了老化试验.通过老化后TOR橡胶沥青的环球软化点、布氏粘度、动态剪切流变等试验,分析了TOR橡胶沥青在环境因素老化作用下性能的变化；通过红外光谱试验,分析了环境因素老化TOR橡胶沥青的机理.试验结果表明:紫外光和水的作用均会加剧沥青的老化,特别是光老化对经过水老化后的沥青老化作用尤为严重；水能够溶解部分老化产物加速沥青的老化.研究结果为TOR橡胶沥青的生产、使用和再生利用奠定理论基础.%To explore the impacts of environmental factors on the aging characteristic of trans-polyoctenamer rubber reactive modifier(TOR) asphalt rubber,the four environmental factors such as heat, oxygen, water and ultraviolet light are designed for combination to age the TOR asphalt rubber. R&B softening point test,Brinell viscosity test and dynamic shear rheometer( DSR)test are employed to analyze the properties of the aged TOR rubber asphalt. Through the infrared spectrum test, the mechanisms of aging are explored. The results show that .?ultraviolet light and water both aggravate the aging of TOR asphalt rubber, especially, ultraviolet light affects the aging performance of water-aged TOR asphalt rubber deeply; the water dissolves part of aging products and promotes the aging of TOR asphalt rubber. The results provide the fundamental basis for the TOR asphalt rubber's production, application and regeneration.