APPLICATION OF POTENTIOSTATIC MEASUREMENTS ACCORDING TO PN-EN 480-14 IN ASSESSMENT OF THE EFFICIENCY OF REINFORCEMENT PROTECTION AGAINST CORROSION BY CONCRETE WITH ADDITION OF FLY ASHES

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Architecture, Civil Engineering, Environment

Silesian University of Technology

Subject: Architecture , Civil Engineering , Engineering, Environmental

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ISSN: 1899-0142

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VOLUME 10 , ISSUE 3 (September 2017) > List of articles

APPLICATION OF POTENTIOSTATIC MEASUREMENTS ACCORDING TO PN-EN 480-14 IN ASSESSMENT OF THE EFFICIENCY OF REINFORCEMENT PROTECTION AGAINST CORROSION BY CONCRETE WITH ADDITION OF FLY ASHES

Katarzyna DOMAGAŁA / Andrzej ŚLIWKA

Keywords : Electrochemical tests, High calcium fly ash, Potentiostatic measurements, Protective properties of concrete, Reinforcement corrosion

Citation Information : Architecture, Civil Engineering, Environment. VOLUME 10 , ISSUE 3 , ISSN (Online) , DOI: 10.21307/acee-2017-041, September 2017 © 2017.

License : (BY-NC-ND 4.0)

Published Online: 28-August-2018

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ABSTRACT

Replacing part of the cement in the concrete with fly ash - products of solid fuel burning, requires testing, including the degree of the reinforcement protection against corrosion provided by concrete. The paper presents a comparison of the results of the tests of the effectiveness of corrosion protection of reinforced concrete with the addition of calcareous fly ash. Tests were conducted by two electrochemical methods. Results obtained by potentiostatic measurement on reinforcement inserts deposited in cylindrical specimens in accordance with EN 480-14 standard were compared with studies investigating the progress of reinforcement corrosion caused by chlorides in loaded and cracked test elements made of these concretes. Tests of the cracked elements reflect the behaviour of reinforced concrete construction during operation in adverse environmental conditions, classified as standard XD and XS exposure classes. Comparison of the tests indicates the potential for potentiostatic measurement to be used to current assessment of protective properties of concrete with mineral additives.

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REFERENCES

[1] Ampadu K.O., Torii K. (2002). Chloride ingress and steel corrosion in cement mortars incorporating lowquality fly ashes. Cement and Concrete Research, 32, 893-901.

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[9] Śliwka A., Domagała K., Zybura A. (2013). Evaluation of protective properties of concretes made of cements with calcareous fly ash with respect to reinforcing steel. Roads and Bridges - Drogi i Mosty, 12(2), 237-250.

[10] PN-EN 480-14: (2008). Domieszki do betonu, zaprawy i zaczynu. Metody badań. Część 14: Oznaczanie podatności korozyjnej stali zbrojeniowej w betonie za pomocą potencjostatycznego badania elektrochemicznego (Admixtures for concrete, mortar and grout. Test methods. Part 14: Determination of the effect on corrosion susceptibility of reinforcing steel by potentiostatic electro-chemical test).

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[12] Domagała K., Śliwka A., Zybura A. (2014). Przebieg korozji zbrojenia chronionego betonem na cemencie zawierającym popiół wapienny (The process of corrosion of the reinforcement protected with concrete made of cement containing high calcium fly ash). Ochrona przed Korozją, 57(1), 21-27.

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