Cathodic protection in reinforced concrete structures affected by macrocell corrosion: a discussion about the significance of the protection criteria

Laurens, Stéphane; François, Raoul

doi:10.21809/rilemtechlett.2017.38

Cited by 7 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The skyscraper has a raft foundation that is 3.7 m thick, and cooperates with 192 piles that are 47 m in length [39]. A cathodic protection system creates a barrier to protect structure from polluted ground water affecting the concrete [40]. The main structural system for this mega-structure is the buttressed core, which allows a very big increase in height.…”

Section: Burj Khalifa (Dubai Uae)-the Highest Mega-structure Systemmentioning

confidence: 99%

Technological Advances and Trends in Modern High-Rise Buildings

Szołomicki

Golasz-Szołomicka

2019

Buildings

View full text Add to dashboard Cite

The purpose of this paper is to provide structural and architectural technological solutions applied in the construction of high-rise buildings, and present the possibilities of technological evolution in this field. Tall buildings always have relied on technological innovations in engineering and scientific progress. New technological developments have been continuously taking place in the world. It is closely linked to the search for efficient construction materials that enable buildings to be constructed higher, faster and safer. This paper presents a survey of the main technological advancements on the example of selected tall buildings erected in the last decade, with an emphasis on geometrical form, the structural system, sophisticated damping systems, sustainability, etc. The famous architectural studios (e.g., for Skidmore, Owings and Merill, Nikhen Sekkei, RMJM, Atkins and WOHA) that specialize, among others, in the designing of skyscrapers have played a major role in the development of technological ideas and architectural forms for such extraordinary engineering structures. Among their completed projects, there are examples of high-rise buildings that set a precedent for future development.

show abstract

Section: Burj Khalifa (Dubai Uae)-the Highest Mega-structure Systemmentioning

confidence: 99%

Technological Advances and Trends in Modern High-Rise Buildings

Szołomicki

Golasz-Szołomicka

2019

Buildings

View full text Add to dashboard Cite

show abstract

“…L'étude expérimentale réalisée sur le mur M3PC et présentée dans cet article a montré que la protection cathodique pouvait être réalisée alors que le potentiel « instant OFF » de l'acier était voisin de À250 à À300 mV/ Ag/AgCl 0,5 M. Par ailleurs, le champ de potentiel avant, pendant et après polarisation cathodique est non uniforme. Une étude complémentaire réalisée par Laurens et François [32] mesurant simultanément les potentiels E OFF en six points différents du mur M3PC a confirmé la nonuniformité des potentiels E OFF .…”

Section: Conclusion-perspectivesunclassified

Protection cathodique appliquée au béton armé aérien : étude expérimentale et modélisation

François

2018

Matériaux & Techniques

Self Cite

View full text Add to dashboard Cite

Cet article présente une étude expérimentale et numérique de la protection cathodique par courant imposé appliquée sur un mur en béton armé soumis à une corrosion localisée (par macro-piles), typique du béton armé. L’étude numérique est réalisée avec le logiciel COMSOL Multiphysics. L’étude expérimentale et l’étude numérique basée sur les lois physiques de base qui régissent les phénomènes électrochimiques confirment que la polarisation des systèmes de corrosion de type macro-piles est hétérogène et ne peut être appréhendée qu’en trois dimensions. L’uniformité du champ de potentiel à l’interface acier-béton n’est physiquement pas réalisable en appliquant un courant de protection de la surface du béton. Le principe général de la protection cathodique n’a pas à être discuté, mais une attention particulière doit être accordée à la réponse non uniforme des systèmes de corrosion par macro-piles car il remet en question, entre autres, le choix de la position des témoins où la performance du système de PC est évaluée et l’utilisation de critères exprimés en potentiels.

show abstract

“…Application of cathodic protection system (CP) on reinforced concrete structure has been developed to prevent the onset of corrosion either for existing reinforced concrete structures or to new RC structures [5].…”

Section: Introductionmentioning

confidence: 99%

Startup Thailand: A New Innovative Sacrificial Anode for Reinforced Concrete Structures

Khomwan¹,

Mungsantisuk²

2019

View full text Add to dashboard Cite

Severe damage reinforced concrete structures affected by corrosion are increasing. The study of prevention and protection technique play an important role to cope this urgent issue. Usage of different types of surface coatings on concrete/rebar are highly depend on workmanships of construction. Thus, sacrificial anodes are offered as one of the corrosion prevention technique. The discrete sacrificial anodes are comprise of zinc metal covered with a high alkalinity mortar which sacrifices itself to protect the corrosion of rebar. The key parameter of sacrificial anode in concrete is the activating mortar. It will help the overall cathodic reaction to efficiently protect reinforcing steel. Therefore, a new sacrificial anode was then accomplished in new activating mortar components. Two different activating mortar type have been established. This research investigated the performance of the new sacrificial anodes installed in the concrete prisms, slabs, and concrete water tanks in order to explore the corrosion prevention performance as per NACE [1], ISO [2] and ASTM standards [3-4]. This experimental study was tested on ASTM G109 [3], ASTM C876 [4] and small-scale water tank suffering from chloride-induced corrosion of the reinforcement. The performance of the anodes was determined at 28 days age and 365 days after installation to assure the activating time dependency for the mortar. The results of concrete prisms and slabs revealed that the anode polarized the rebar at a significant potential. For the water tank test results, two different concrete type were conducted with exposing chloride solution and assessed using close-interval potential mapping. The results showed a good agreement with enhance the structural durability.

show abstract

Cathodic protection in reinforced concrete structures affected by macrocell corrosion: a discussion about the significance of the protection criteria

Cited by 7 publications

References 13 publications

Technological Advances and Trends in Modern High-Rise Buildings

Technological Advances and Trends in Modern High-Rise Buildings

Protection cathodique appliquée au béton armé aérien : étude expérimentale et modélisation

Startup Thailand: A New Innovative Sacrificial Anode for Reinforced Concrete Structures

Contact Info

Product

Resources

About