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基于衰减全反射红外光谱技术的水在沥青中扩散过程研究
Study on Water Diffusion in Asphalt Based on FTIR ATR
投稿时间:2018-03-21  修订日期:2018-05-15
DOI:103969/j.issn.1007 9629201901018
中文关键词:  沥青  衰减全反射傅里叶红外光谱  水损坏  扩散
英文关键词:asphalt  Fourier transform infrared attenuated total reflectance spectroscopy(FTIR ATR)  water damage  diffusion
基金项目:国家自然科学基金资助项目(51408287,51668038);甘肃省自然科学基金资助项目(1606RJZ042)
              
作者单位
魏定邦
WEI Dingbang
兰州交通大学道桥工程灾害防治技术国家地方联合工程实验室,甘肃兰州730070
National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou 730070, China
李晓民
LI Xiaomin
兰州交通大学道桥工程灾害防治技术国家地方联合工程实验室,甘肃兰州730070
National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou 730070, China
何孝万
HE Xiaowan
重庆交通大学土木工程学院,重庆400074
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
王起才
WANG Qicai
兰州交通大学道桥工程灾害防治技术国家地方联合工程实验室,甘肃兰州730070
National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou 730070, China
李波
LI Bo
兰州交通大学道桥工程灾害防治技术国家地方联合工程实验室,甘肃兰州730070
National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou 730070, China
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中文摘要:
      采用衰减全反射傅里叶红外光谱技术,以羟基伸缩振动峰面积为量化指标,研究了水在沥青中的扩散过程,并探讨了温度、压力和沥青老化等因素对水在沥青中扩散系数的影响.结果表明:扩散入沥青中的水的总量与羟基伸缩振动峰面积之间存在对应关系;水在沥青中的扩散过程可分为2个阶段,第一阶段以吸收自由水为主,扩散系数较高,第二阶段以水分子与沥青分子或极性基团的结合为主,扩散系数较低;温度和压力的提高均会增强水在沥青中的扩散能力;老化会降低沥青对水扩散的抵抗能力,使水在沥青中扩散的第一阶段显著加快.
英文摘要:
      The peak area of hydroxyl stretching vibration was quantified to study the diffusion process of water in asphalt by Fourier transform infrared attenuated total reflectance spectroscopy(FTIR ATR), and the influences of temperature, pressure and asphalt aging were also investigated. The results show that there is a correspondence between the area of the OH stretching and the water content diffusing into asphalt. Moreover, the diffusion process can be divided into two stages, in the first stage the priority is given to absorbing free water with a higher diffusion coefficient, and in the second stage water molecules and asphalt molecules or polar group are combined, the diffusion coefficient decreases correspondingly. The increase of temperature and pressure enhances the diffusion ability of water in asphalt. Meanwhile, aging can reduce the resistance of asphalt to water diffusion and accelerate the diffusion of water, especially in the first diffusion stage.
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