• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>NDE/NDT for Highways and Bridges >Laser-Induced Breakdown Spectroscopy for Fast Analysis of Ingress Profiles of Ions on Concrete
【24h】

Laser-Induced Breakdown Spectroscopy for Fast Analysis of Ingress Profiles of Ions on Concrete

机译：激光诱导的击穿光谱，用于快速分析混凝土中离子的进入型材

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An increasing number of reinforced concrete structures, mainly in transportation infrastructure, suffer from deterioration, e.g. freeze-thaw effects or corrosion. Deicing salts, which have been intensively used in the last decades, cause pitting corrosion on reinforcement due to penetration of chloride ions. The penetration of alkaline ions may also influence the alkali silica reaction (ASR) of highway structures. A comparatively new method for the application at building materials, laser-induced breakdown spectroscopy (LIBS), was used to determine element distributions and ingress profiles of ions on concrete specimens. With this method it is possible to measure directly on an optical accessible surface of a specimen. The time needed for sample preparation and measurement is low. With LIBS repeatable automated measurements on a large number of specimens can be carried out. The presented results show that the heterogeneity of the material is taken into account and thus the errors due to the sampling is minimized. A mobile setup for on-site element analysis is presented. The paper describes the results measured on concrete samples obtained from parking decks and cores taken from highways. A comparison with standard chemical analysis will be presented.
机译：越来越多的钢筋混凝土结构，主要用于运输基础设施，遭受恶化，例如，遭受劣化，例如，冻融效果或腐蚀。在过去几十年中集中使用的除冰盐，由于氯离子的渗透而导致加固腐蚀。碱性离子的渗透也可能影响公路结构的碱性二氧化硅反应（ASR）。用于在建筑材料中应用激光诱导的击穿光谱（Libs）的相对新的方法，用于确定混凝土样本上的离子的元素分布和进入轮廓。通过这种方法，可以直接测量样品的光学可接近的表面。样品制备和测量所需的时间很低。利用LIBS可以进行大量样本的可重复自动测量。所提出的结果表明，考虑了材料的异质性，因此最小化了由于采样引起的误差。提出了用于现场元素分析的移动设置。本文介绍了从高速公路占用的停车甲板和核心的混凝土样品上测量的结果。将提出与标准化学分析的比较。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号