环氧树脂改性沥青的微观结构与力学性能

项目名称： 环氧树脂改性沥青的微观结构与力学性能

项目编号： No.50878053

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 轻工业、手工业

项目作者： 闵召辉

作者单位： 东南大学

项目金额： 27万元

中文摘要： 本课题主要开展环氧树脂沥青的微观结构与力学性能的研究，首先，采用了差示量热（DSC）及红外光谱（FTIR）对石油沥青及煤沥青与环氧树脂共混体系进行分析；对不同体分比的基质沥青及MA改性沥青的环氧树脂沥青体系进行不等温固化动力学研究；开展了不同交联度和不同沥青体分比的基质沥青及MA改性沥青的环氧树脂沥青的动态力学性能（DMA）测试，并采用扫描电子显微镜（SEM）对试件的断口进行微观结构观察与分析；制备了不同交联度及不同沥青体分比的环氧树脂沥青混合料试件，进行低温弯曲及断裂性能测试。结果表明，基质沥青及MA改性沥青与环氧树脂共混物为不相容体系；沥青用量改变及MA改性处理对环氧树脂沥青的固化动力学参数均具有一定影响，但固化反应级数不变；交联度低的环氧树脂沥青材料只具有玻璃态和过渡态两种力学行为状态，其试件断口形态凹凸不平，其混合料较交联度高的材料具备较好的抵抗低温弯曲及断裂性能；动态力学性能及SEM扫描照片研究表明沥青体分比区间为0.400~0.455时，环氧树脂沥青材料发生相逆转，相逆转后材料从树脂相基体转向沥青相基体，混合料断裂性能发生大幅度降低。

中文关键词： 环氧树脂沥青；微观结构；力学性能；相逆转

英文摘要： This project was conducted to study micro-structure and mechanic properties of epoxy resin asphalt. Differential Scanning Calorimeter (DSC) and Fourier Transform Infrared Spectroscopy (FTIR) were firstly used to analysis the compatibility between epoxy resin and asphalt or coal tar. Then, the non-isothermal dynamics was perused for epoxy resin asphalt blended with non-modified and maleic anhydride-modified asphalt under different asphalt volumes. In addition, dynamic mechanics analysis (DMA) and scan electric microscope (SEM) were conducted to study mechanic properties and micro-structure of epoxy resin asphalt blended with non-modified and maleic anhydride (MA)-modified asphalt under different asphalt volumes and cross-link density, low temperature fracture performances for mixes prepared with this resin asphalt were also studied. Test results showed that the incompatibility existed between epoxy resin and asphalt or maleic anhydride (MA)-modified asphalt, and, the volume change of the non-modified or modified asphalt resulted in variations of curing kinetics parameters except reaction order. SEM photos indicated that irregular surface was processed by this epoxy resin asphalt material with low cross-link density whose rubbery state of three kinds of mechanics behaviors almost disappeared, which led to better low-temperature blending and fracture performances. Both dynamic mechanics performance and SEM photos indicated that the critical range asphalt volume fraction of phase transform for this modified material was between 0.400 and 0.455.The matrix changed to asphalt phase and the fracture performances of mixes with this resin asphalt decreased greatly when the phase transform happened.

英文关键词： epoxy resin asphalt;micro-structure; mechanic properties;phase transform