Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
$ AgNO_{3} $ spray tests: advantages, weaknesses, and various applications to quantify chloride ingress into concrete. Part 2: Non-steady-state migration tests and chloride diffusion coefficients
Abstract This paper forms the second part of a series devoted to the analysis of the capabilities of $ AgNO_{3} $ spray tests, in view of using them for various issues, within the framework of the evaluation and the prediction of chloride-induced corrosion risks. More precisely, the Maultzsch procedure (spraying of 0.1-N $ AgNO_{3} $ solution + $ K_{2} $$ CrO_{4} $) and the use of $ AgNO_{3} $ alone have been investigated on a broad range of concretes. In this second part, the feasibility of colorimetric techniques on saturated specimens cast in laboratory, after non-steady-state migration tests carried out in various conditions is discussed. Colorimetric methods have been applied to the determination of the average penetration depth. In addition, the detection threshold of these techniques has been investigated. Moreover, colorimetric methods have been applied to the calculation of apparent and effective chloride diffusion coefficients from non-steady-state diffusion and migration tests. The results then obtained have been compared to the values obtained by other types of methods.
$ AgNO_{3} $ spray tests: advantages, weaknesses, and various applications to quantify chloride ingress into concrete. Part 2: Non-steady-state migration tests and chloride diffusion coefficients
Abstract This paper forms the second part of a series devoted to the analysis of the capabilities of $ AgNO_{3} $ spray tests, in view of using them for various issues, within the framework of the evaluation and the prediction of chloride-induced corrosion risks. More precisely, the Maultzsch procedure (spraying of 0.1-N $ AgNO_{3} $ solution + $ K_{2} $$ CrO_{4} $) and the use of $ AgNO_{3} $ alone have been investigated on a broad range of concretes. In this second part, the feasibility of colorimetric techniques on saturated specimens cast in laboratory, after non-steady-state migration tests carried out in various conditions is discussed. Colorimetric methods have been applied to the determination of the average penetration depth. In addition, the detection threshold of these techniques has been investigated. Moreover, colorimetric methods have been applied to the calculation of apparent and effective chloride diffusion coefficients from non-steady-state diffusion and migration tests. The results then obtained have been compared to the values obtained by other types of methods.
$ AgNO_{3} $ spray tests: advantages, weaknesses, and various applications to quantify chloride ingress into concrete. Part 2: Non-steady-state migration tests and chloride diffusion coefficients
Baroghel-Bouny, Véronique (Autor:in) / Belin, Patrick (Autor:in) / Maultzsch, Matthias (Autor:in) / Henry, Dominique (Autor:in)
2007
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch