Prof. Dr.-Ing. Kenji Reichling, Prof. Dr.-Ing. Jörg Harnisch, Konstantin Fache M.Sc.
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引用次数: 0
摘要
在标准试样上确定混凝土电阻率的形式因素混凝土的电阻率可以作为混凝土生产中结构诊断或质量保证的有用参数。例如，使用温纳探针，可以在不考虑非均质性或小样品尺寸的情况下确定视电阻率，对现有结构的岩心样品几乎没有什么努力。试样越小，电场的扩散受到的影响越大，这可能导致误读。为了避免这种情况，在DIN EN 12390-19中引入了外形尺寸。然而，这些只适用于少数测试样品的几何形状。在本文中，形状因子是由有限元方法得出的，并根据实验室测量和文献的结果进行了验证。在此基础上，提供了各种常用试样几何形状的形状因子。
Formfaktoren für die Bestimmung des spezifischen Betonwiderstands an Normprobekörpern
Form factors for determining the electrical concrete resistivity on standard test specimens
The electrical resistivity of concrete can be a useful parameter regarding structural diagnostics or quality assurance in concrete production. Using a Wenner probe, for example, the apparent electrical resistivity can be determined, without considering heterogeneities or small specimen dimensions, with little effort on core samples from existing structures. The smaller the test specimens, the more the spread of the electric field is influenced, which can lead to misinterpretations. To avoid this, form factors are introduced in DIN EN 12390-19. However, these are only specified for a few test specimen geometries. In this article, form factors are derived by finite element methods and verified based on results from laboratory measurements and literature. Building on this, form factors for a variety of commonly used test specimen geometries are provided.
期刊介绍：
Beton- und Stahlbetonbau veröffentlicht anwendungsorientierte Beiträge zum gesamten Massivbau. Neueste wissenschaftliche Erkenntnisse, Themen aus der Baupraxis und anwendungsorientierte Beiträge über neue Normen, Vorschriften und Richtlinien machen Beton- und Stahlbetonbau zu einem unverzichtbaren Begleiter und einer der bedeutendsten Zeitschriften für den Bauingenieur, seit mehr als 100 Jahren. Mit Berichten über ausgeführte Projekte und Innovationen im Baugeschehen erhält der Ingenieur weitere praktische Hilfestellungen für seine tägliche Arbeit.
Themenüberblick:
Entwurf, Berechnung, Bemessung und Ausführung sämtlicher Konstruktionen aus Beton
Instandsetzung und Betonerhaltung
Bauwerkserhaltung und - instandsetzung
Nachrechnung bestehender Brückenbauwerke
Bauwerksüberwachung
Bewehrungs- und Befestigungstechnik
Entwicklungen der Baustoffe
Spannbeton
ausgeführte Projekte
Normen.
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