Advances in durability monitoring of concrete structures

Author(s): Ueli Angst
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials Systems and Structures (SMSS2019) Durability, Monitoring and Repair of Structures
Editor(s): Ana Baričević, Marija Jelčić Rukavina, Domagoj Damjanović, Maurizio Guadagnini
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 572-579
Total Pages: 848
Language: English

Abstract: In order to safely, cost-efficiently, and sustainably maintain our ageing reinforced concrete infrastructures, there is a need for reliable methods to assess and monitor the condition and deterioration of these structures. Major parameters governing the initiation of reinforcing steel corrosion in concrete are the pH and the chloride concentration of the concrete pore solution. So far, the non-destructive in-situ measurement of these parameters was not possible. Here a novel sensor system allowing the determination of these crucial variables is presented.
Once corrosion has initiated, the rate at which the steel sectional loss occurs is crucial for estimating the residual service life, and ultimately to determine the time until an intervention (repair, replacement, etc.) is needed. This contribution presents a recently developed method based on acquiring and processing alternating current signals recorded in the time domain. Thanks to a refined approach of signal processing, this robust approach is capable of delivering in short time a number of parameters relevant for the kinetics of a corroding system.
These recent advances in the field of measuring methods and sensors are discussed in the context of structural health (durability) monitoring, both regarding the initiation and the propagation stage

Online publication :2019
Publication type : full_text
Public price (Euros) : 00