沥青再生扩散模型及再生效果评价方法分析和改进  

Analysis and Improvement of Evaluation Methods for Asphalt Regeneration Diffusion Models and Regeneration Effect

作　　者：裴妍[1] 徐光红 李有光[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]重庆市智翔铺道技术工程有限公司,重庆400067

出　　处：《公路交通技术》2013年第1期38-41,46,共5页Technology of Highway and Transport

基　　金：重庆市科技攻关项目(CSTC2011AB6031)

摘　　要：扩散程度是反映老化沥青再生进程的重要指标,而扩散模型可以更加直观地对回收沥青路面材料(RAP)再生进行描述。对比分析现有用于描述沥青扩散的模型、扩散理论、扩散效果评价手段及再生剂再生效果,总结不同模型、理论、试验条件间的差异,认为应进一步寻找一种更接近实际状态的RAP老化沥青膜,并加强评价方法的可行性研究。提出可通过模拟再生RAP老化沥青膜的试验方法,运用核磁共振(HNMR)与红外(IR)相结合的手段,观察再生进程并用沥青胶体结构的电导率方法对再生效果进行表征。Degree of diffusion is an important index to reflect regeneration progress of ageing asphalt,while diffusion models can describe regeneration of reclaimed asphalt pavement（RAP） more visually.This paper conducts comparative analysis for existing models,diffusion theories,evaluation means for diffusion effect and regeneration effect of regenerants used for description of asphalt diffusion and summarizes differences between different models,theories and test conditions.The paper regards that an RAP ageing asphalt film closer to actual state should be further sought and feasibility study on evaluation methods should be strengthened.The paper proposes to observe regeneration progress via the test method simulating regenerative RAP ageing asphalt film and the means combining H Nuclear Magnetic Resonance（HNMR） and infrared（IR）,and to represent the regeneration effect by means of conductivity method of asphalt colloid structure.

关 键 词：沥青再生 扩散模型 扩散机理 扩散效果评价 

分 类 号：U416.217[交通运输工程—道路与铁道工程]