摘要
橡胶坝的老化检测对于坝袋的维护及潜在灾害的预防具有重要意义。该文提出了一种基于低场核磁共振技术的橡胶坝老化程度检测方法,针对不同老化程度的坝袋样品开展了实验室检测与分析。通过对坝袋的橡胶层和合成纤维层分别进行核磁共振检测,定量分析橡胶层的交联密度以及合成纤维层的含水率,进而准确评估坝袋的老化程度。实验结果表明,随着坝袋的老化,橡胶层的交联密度显著降低,其核磁共振信号强度亦随之减弱;老化后的坝袋水密性降低,合成纤维层吸水膨胀,核磁共振信号强度显著增强。该方法通过测量坝袋橡胶层的交联密度和合成纤维层的含水率,可实现橡胶坝老化程度的现场非取样定量评估,具有无损检测、快速响应和高精度等优势。
The aging detection of rubber dams is of significant importance for the maintenance of the dam bags and the prevention of potential disasters.This paper proposes a method for detecting the degree of aging of rubber dams based on low-field nuclear magnetic resonance technology,and has conducted laboratory testing and analysis on samples of dam bags with different aging levels.By performing nuclear magnetic resonance tests on both the rubber layer and the synthetic fiber layer of the dam bags,the crosslinking density of the rubber layer and the moisture content of the synthetic fiber layer were quantitatively analyzed,thereby accurately assessing the aging degree of the dam bags.Experimental results indicate that as the dam bags age,the crosslinking density of the rubber layer significantly decreases,and its nuclear magnetic resonance signal intensity also weakens;the water tightness of the aged dam bags decreases,the synthetic fiber layer absorbs water and swells,and the nuclear magnetic resonance signal intensity significantly increases.This method enables on-site non-sampling quantitative evaluation of the aging degree of rubber dams by measuring the crosslinking density of the rubber layer of the dam bag and the moisture content of the synthetic fiber layer,and has the advantages of non-destructive testing,rapid response and high precision.
作者
张钊
潘义为
ZHANG Zhao;PAN Yi-wei(Water Resources Research Institute of Shandong Province,Jinan 250014,Shandong,China;Center Of Construction Management&Ouality&Safety Supervision,Ministry Of Water Resources,P.R.C,Beijing 100038,China)
出处
《合成材料老化与应用》
2025年第6期12-16,共5页
Synthetic Materials Aging and Application
基金
基于NMR技术的埋地式输水管道渗漏检测技术研究(项目编号:SDSKYZX202112)。
关键词
核磁共振
橡胶坝
交联密度
老化程度
nuclear magnetic resonance
rubber dam
crosslink density
aging degree
