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

DOMAGAŁA, Katarzyna; ŚLIWKA, Andrzej

doi:10.21307/acee-2017-041

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.

References

Ampadu K.O., Torii K. (2002). Chloride ingress and steel corrosion in cement mortars incorporating low- quality fly ashes. Cement and Concrete Research, 32, 893–901.10.1016/S0008-8846(02)00721-4
Search in Google Scholar Back to article
Saraswathy V., Muralidharan S., Thangavel K., Srinivasan S. (2003). Influence of activated fly ash on corrosion-resistance and strength of concrete. Cement and Concrete Composites, 25, 113–120.10.1016/S0958-9465(02)00068-9
Search in Google Scholar Back to article
Jiang L., Liu Z., Ye Y. (2004). Durability of concrete incorporating large volumes of low-quality fly ash. Cement and Concrete Research, 34, 1411–1413.10.1016/j.cemconres.2003.12.029
Search in Google Scholar Back to article
Kayali O., Zhu B. (2005). Chloride inducted reinforcement corrosion in lightweight aggregate high- strength fly ash concrete. Construction and Building Materials, 19, 327–336.10.1016/j.conbuildmat.2004.07.003
Search in Google Scholar Back to article
Pacewska B., Bukowska M., Wilińska I., Swat M. (2002). Modification of the properties of concrete by a new pozzolan. A waste catalyst from the catalytic process in a fluidized bed. Cement and Concrete Research, 32, 145–152.10.1016/S0008-8846(01)00646-9
Search in Google Scholar Back to article
Hossain K.M.A., Lachemi M. (2004). Corrosion resistance and chloride diffusivity of volcanic ash blended cement mortar. Cement and Concrete Research, 34, 695–702.10.1016/j.cemconres.2003.10.021
Search in Google Scholar Back to article
Montemor M.F., Simões A.M., Salta M.M. (2000). Effect of fly ash on concrete reinforcement corrosion studied by EIS. Cement and Concrete Composites, 22, 175–185.10.1016/S0958-9465(00)00003-2
Search in Google Scholar Back to article
Montemor M.F., Cunha M.P., Ferreira M.G., Simões A.M. (2002). Corrosion behaviour of rebars in fly ash mortar exposed to carbon dioxide and chlorides. Cement and Concrete Composites, 24, 45–53.10.1016/S0958-9465(01)00025-7
Search in Google Scholar Back to article
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.
Search in Google Scholar Back to article
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).
Search in Google Scholar Back to article
Domagała K., Śliwka A., Zybura A. (2013, Sep. 4-6). Protective properties of reinforcing steel in concrete containing fly ash. Central European Congress on Concrete Engineering “Concrete Structures in Urban Areas”, Wrocław, Poland, 292–295.
Search in Google Scholar Back to article
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.
Search in Google Scholar Back to article

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

Abstract

Paradigm

My account