TY - JOUR
T1 - Grenzen des Korrosionsmonitorings zum Wirksamkeitsnachweis des Instandsetzungsprinzips 8.3 (W-Cl)
AU - Zausinger, Christoph
AU - Osterminski, Kai
AU - Gehlen, Christoph
N1 - Publisher Copyright:
© 2023 Ernst & Sohn GmbH.
PY - 2024/3
Y1 - 2024/3
N2 - Corrosion monitoring within the repair principle 8.3 (W-Cl) in cracked, short term chloride exposed and subsequently coated reinforced concrete. Reinforcement Corrosion in cracked concrete due to de-icing salt exposure for a short period of time has been a well-known and controversially discussed problem in the maintenance of basic infrastructure for decades. For the preservation of these structures, technical, German guidelines offer the repair principle 8.3 (W-Cl). Here, the cracked reinforced concrete surface is provided with a surface protection system to prevent further entry of deleterious species and to achieve long-term drying of the concrete. We will show whether the already existing deleterious input in the form of chlorides from de-icing salts can reach a supercritical level within one winter period and which parameters can be used to determine the condition of the affected structure. The course of the corrosion currents. the course of the linear polarization resistances as well as the chloride concentration in the crack area at the reinforcement level are the most important parameters. The results show that only their correlation enables deterministic proof of the success of the repair. Without knowledge of these values, it is not possible to perform a reliable condition assessment and because of that continuous corrosion monitoring is indispensable.
AB - Corrosion monitoring within the repair principle 8.3 (W-Cl) in cracked, short term chloride exposed and subsequently coated reinforced concrete. Reinforcement Corrosion in cracked concrete due to de-icing salt exposure for a short period of time has been a well-known and controversially discussed problem in the maintenance of basic infrastructure for decades. For the preservation of these structures, technical, German guidelines offer the repair principle 8.3 (W-Cl). Here, the cracked reinforced concrete surface is provided with a surface protection system to prevent further entry of deleterious species and to achieve long-term drying of the concrete. We will show whether the already existing deleterious input in the form of chlorides from de-icing salts can reach a supercritical level within one winter period and which parameters can be used to determine the condition of the affected structure. The course of the corrosion currents. the course of the linear polarization resistances as well as the chloride concentration in the crack area at the reinforcement level are the most important parameters. The results show that only their correlation enables deterministic proof of the success of the repair. Without knowledge of these values, it is not possible to perform a reliable condition assessment and because of that continuous corrosion monitoring is indispensable.
KW - cracked concrete
KW - monitoring
KW - reinforcement corrosion
KW - surface coating
UR - http://www.scopus.com/inward/record.url?scp=85179727269&partnerID=8YFLogxK
U2 - 10.1002/best.202300083
DO - 10.1002/best.202300083
M3 - Artikel
AN - SCOPUS:85179727269
SN - 0005-9900
VL - 119
SP - 181
EP - 189
JO - Beton- und Stahlbetonbau
JF - Beton- und Stahlbetonbau
IS - 3
ER -