Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction
Reinforcement corrosion of marine and coastal hydraulic structures due to chloride aggression and concrete carbonization leads to a sharp decrease in structure safety. The reinforcement is subjected to a depassivation process as soon as a chloride concentration on its surface exceeds a certain thres...
Published in: | Science & Technique |
---|---|
Main Authors: | , , |
Format: | Other/Unknown Material |
Language: | English |
Published: |
БНТУ
2019
|
Subjects: | |
Online Access: | http://rep.bntu.by/handle/data/55891 https://doi.org/10.21122/2227-1031-2019-18-4-284-291 |
id |
ftbelarusntuni:oai:rep.bntu.by:data/55891 |
---|---|
record_format |
openpolar |
spelling |
ftbelarusntuni:oai:rep.bntu.by:data/55891 2023-05-15T18:09:16+02:00 Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction Железобетон при воздействии карбонизации и хлоридной агрессии: вероятностная модель расчета-прогноза срока службы Leonovich, S. N. Shalyi, E. E. Kim, L. V. Минск 2019 http://rep.bntu.by/handle/data/55891 https://doi.org/10.21122/2227-1031-2019-18-4-284-291 en_EN eng БНТУ Leonovich, S. N. Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction = Железобетон при воздействии карбонизации и хлоридной агрессии: вероятностная модель расчета-прогноза срока службы / S. N. Leonovich, E. E. Shalyi, L. V. Kim // Наука и техника. – 2019. – № 4. – С. 284-291. http://rep.bntu.by/handle/data/55891 doi:10.21122/2227-1031-2019-18-4-284-291 Статья (Article) 2019 ftbelarusntuni https://doi.org/10.21122/2227-1031-2019-18-4-284-291 2019-08-20T14:40:07Z Reinforcement corrosion of marine and coastal hydraulic structures due to chloride aggression and concrete carbonization leads to a sharp decrease in structure safety. The reinforcement is subjected to a depassivation process as soon as a chloride concentration on its surface exceeds a certain threshold concentration, or the pH value in a concrete protective layer is decreased to a threshold value due to carbonation. Electrochemical reactions are realized with formation of corrosion products due to penetration of oxygen up to reinforcement surface. This leads to cracking of the concrete protective layer and decrease in reinforcement cross-section. The paper proposes a method for predicting a complex degradation of reinforced concrete structures with due account of various mechanisms of corrosion wear that allows to develop efficient methods for improvement of structure durability and maintainability which are operated in the marine environment. A methodology for forecasting of reinforced concrete service life prediction has been developed under a combined effect of carbonization and chloride aggression while using finite-difference and probability models. The paper takes into account initiation periods of reinforcement corrosion and propagation periods for conditions of Sakhalin shelf zone. Field surveys of Kholmsk and Korsakov port facilities are presented in the paper. Carbonization front and chloride content have been estimated according to depth of the concrete protective layer. The paper proposes a model that allows to determine an average period prior to repair while taking into account rate of concrete protective layer degradation caused by simultaneous action of two corrosion processes: carbonization and chloride aggression. Other/Unknown Material Sakhalin Belarusian National Technical University: Repository Science & Technique 18 4 284 291 |
institution |
Open Polar |
collection |
Belarusian National Technical University: Repository |
op_collection_id |
ftbelarusntuni |
language |
English |
description |
Reinforcement corrosion of marine and coastal hydraulic structures due to chloride aggression and concrete carbonization leads to a sharp decrease in structure safety. The reinforcement is subjected to a depassivation process as soon as a chloride concentration on its surface exceeds a certain threshold concentration, or the pH value in a concrete protective layer is decreased to a threshold value due to carbonation. Electrochemical reactions are realized with formation of corrosion products due to penetration of oxygen up to reinforcement surface. This leads to cracking of the concrete protective layer and decrease in reinforcement cross-section. The paper proposes a method for predicting a complex degradation of reinforced concrete structures with due account of various mechanisms of corrosion wear that allows to develop efficient methods for improvement of structure durability and maintainability which are operated in the marine environment. A methodology for forecasting of reinforced concrete service life prediction has been developed under a combined effect of carbonization and chloride aggression while using finite-difference and probability models. The paper takes into account initiation periods of reinforcement corrosion and propagation periods for conditions of Sakhalin shelf zone. Field surveys of Kholmsk and Korsakov port facilities are presented in the paper. Carbonization front and chloride content have been estimated according to depth of the concrete protective layer. The paper proposes a model that allows to determine an average period prior to repair while taking into account rate of concrete protective layer degradation caused by simultaneous action of two corrosion processes: carbonization and chloride aggression. |
format |
Other/Unknown Material |
author |
Leonovich, S. N. Shalyi, E. E. Kim, L. V. |
spellingShingle |
Leonovich, S. N. Shalyi, E. E. Kim, L. V. Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction |
author_facet |
Leonovich, S. N. Shalyi, E. E. Kim, L. V. |
author_sort |
Leonovich, S. N. |
title |
Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction |
title_short |
Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction |
title_full |
Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction |
title_fullStr |
Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction |
title_full_unstemmed |
Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction |
title_sort |
reinforced concrete under the action of carbonization and chloride aggression: a probabilistic model for service life prediction |
publisher |
БНТУ |
publishDate |
2019 |
url |
http://rep.bntu.by/handle/data/55891 https://doi.org/10.21122/2227-1031-2019-18-4-284-291 |
op_coverage |
Минск |
genre |
Sakhalin |
genre_facet |
Sakhalin |
op_relation |
Leonovich, S. N. Reinforced Concrete under the Action of Carbonization and Chloride Aggression: a Probabilistic Model for Service Life Prediction = Железобетон при воздействии карбонизации и хлоридной агрессии: вероятностная модель расчета-прогноза срока службы / S. N. Leonovich, E. E. Shalyi, L. V. Kim // Наука и техника. – 2019. – № 4. – С. 284-291. http://rep.bntu.by/handle/data/55891 doi:10.21122/2227-1031-2019-18-4-284-291 |
op_doi |
https://doi.org/10.21122/2227-1031-2019-18-4-284-291 |
container_title |
Science & Technique |
container_volume |
18 |
container_issue |
4 |
container_start_page |
284 |
op_container_end_page |
291 |
_version_ |
1766181739483365376 |