EVA分子结构对其改性沥青性能的影响

发布时间：2018-06-21 03:48

本文选题：EVA改性沥青 + VA含量　；参考：《中国石油大学学报(自然科学版)》2017年05期

【摘要】：以秦皇岛AH-70沥青和克拉玛依AH-70沥青为基质沥青,以不同醋酸乙烯(VA)含量的乙烯-醋酸乙烯共聚物(EVA)为改性剂制备EVA改性沥青,采用动态力学分析(DMA)方法和荧光显微镜考察VA含量对EVA改性沥青流变性、相容性及常规性能等的影响。结果表明:在测定频率与温度范围内,随着VA含量的增加,EVA改性沥青的相位角δ增大,黏性成分逐渐增加,车辙因子G*/sinδ减小,抗车辙能力逐渐减弱,相容性先增强后减弱;在测定VA含量范围内,当VA含量为25%时,EVA改性沥青的综合性能达到最好;秦皇岛EVA改性沥青的抗车辙能力优于克拉玛依EVA改性沥青,克拉玛依EVA改性沥青的相容性相对较好。
[Abstract]:EVA modified asphalt was prepared from Qinhuangdao AH-70 asphalt and Karamay AH-70 asphalt as matrix asphalt and ethylene vinyl acetate copolymer (EVA) with different content of vinyl acetate as modifier. The effects of VA content on rheology, compatibility and conventional properties of EVA modified asphalt were investigated by means of dynamic mechanical analysis (DMA) and fluorescence microscope. The results show that with the increase of VA content, the phase angle 未 of EVA modified asphalt increases, the viscosity increases gradually, the rutting factor G / sin 未 decreases, and the rutting resistance ability weakens gradually, and the compatibility increases first and then weakens with the increase of VA content in the range of frequency and temperature. When the content of VA is 25, the comprehensive performance of EVA modified asphalt is the best, and the rutting resistance of Qinhuangdao EVA modified asphalt is better than that of Karamay EVA modified asphalt, and the compatibility of Karamay EVA modified asphalt is relatively good.
【作者单位】：中国石油大学重质油国家重点实验室;
【基金】：中央高校基本科研业务费专项(24720156046A) 中国石油大学研究生创新工程项目(15CX06046A)
【分类号】：U414

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