项目名称: 多聚磷酸改性沥青微观结构表征与化学改性机制研究
项目编号: No.51278060
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 建筑科学
项目作者: 郝培文
作者单位: 长安大学
项目金额: 78万元
中文摘要: 传统的聚合物改性沥青大多为物理共混改性,存在改性剂与基质沥青相容性差,热稳定性不足等问题,同时加工工艺复杂,在一定程度上制约了改性沥青效能发挥。而多聚磷酸可以实现对沥青的化学改性,且成本低廉,工艺简单。本项目利用傅里叶红外光谱法、薄层色谱法等现代物相分析手段探析多聚磷酸改性沥青的化学改性机制,采用定性与定量相结合的方法分析不同组合因素对沥青改性效果的影响;利用原子力显微镜测定表征多聚磷酸改性沥青微观形态结构,通过形态学和数理统计方法定量确定多聚磷酸改性沥青微观形态参数;基于多聚磷酸质子化原理,探讨多聚磷酸复配改性沥青储存稳定性机理;在对多聚磷酸改性沥青流变性能研究基础上,开发简易的可表征改性沥青流变性能的改良锥入度试验方法,提出多聚磷酸改性沥青技术性能的合理评价体系,为多聚磷酸改性沥青的大规模应用奠定理论基础,从而改善沥青路面的使用性能与服务水平。
中文关键词: 多聚磷酸改性沥青;化学改性机制;微观结构;流变性能;评价指标
英文摘要: The traditional polymer modified bitumen mostly are the physical modification, the modifier has a poorer compatibility with the base asphalt and the thermal storage stability is insufficient, meanwhile, the processing technology is sophisticated, so, to a certain extent, the modified asphalt efficiency is restricted by the processing technology. However, the polyphosphoric acid has the advantages of reaching the requirement of the chemical modifier, low cost and simple mix technology. This project uses Fourier Transform Infrared(FTIR) Spectrometry, Thin Layer Chromatography (TLC) and other modern phase analysis means to research the chemical modified property of the phosphoric acid modified asphalt; uses combination of the qualitative and quantitative methods to explore the influence of different combination factors on the asphalt modification effect; uses Atomic Force Microscope(AFM) to study the microcosmic morphology of the phosphoric acid modified asphalt ,with morphological and mathematical statistics methods to quantitatively determine the microstructure of parameters of many phosphoric acid modified asphalt; studies the storage stability mechanism of the phosphoric acid modified compound asphalt based on the principle of phosphoric acid protonation; develops improved cone penetration test method and cha
英文关键词: Polyphosphoric Acid Modified Asphalt;chemical Modification Mechanism;Microstructure Characterization;;Rheological properties;Evaluation Index