Nina Gartner (Avtor), Miha Hren (Avtor), Tadeja Kosec Mikić (Avtor), Andraž Legat (Avtor)

Povzetek

Alkali-activated materials (AAMs) present a promising potential alternative to ordinary Portland cement (OPC). The service life of reinforced concrete structures depends greatly on the corrosion resistance of the steel used for reinforcement. Due to the wide range and diverse properties of AAMs, the corrosion processes of steel in these materials is still relatively unknown. Three different alkali-activated mortar mixes, based on fly ash, slag, or metakaolin, were prepared for this research. An ordinary carbon-steel reinforcing bar was installed in each of the mortar mixes. In order to study the corrosion properties of steel in the selected mortars, the specimens were exposed to a saline solution in wet/dry cycles for 17 weeks, and periodic electrochemical impedance spectroscopy (EIS) measurements were performed. The propagation of corrosion damage on the embedded steel bars was followed using X-ray computed microtomography (XCT). Periodic EIS measurements of the AAMs showed different impedance response in individual AAMs. Moreover, these impedance responses also changed over the time of exposure. Interpretation of the results was based on visual and numerical analysis of the corrosion damages obtained by XCT, which confirmed corrosion damage of varying type and extent on steel bars embedded in the tested AAMs.

Ključne besede

korozija;alkalijsko-aktivirane malte;armaturno jeklo;elektrokemijska impedančna spektroskopija;rentgenska računalniška mikrotomografija;vizualna analiza;odprti dostop;corrosion;alkali-activated mortars;steel reinforcement;electrochemical impedance spectroscopy;X-ray computed microtomography;visual analysis;open access;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: ZAG - Zavod za gradbeništvo Slovenije
Založnik: Molecular Diversity Preservation International
UDK: 620.1/.2
COBISS: 88913923 Povezava se bo odprla v novem oknu
ISSN: 1996-1944
Št. ogledov: 20
Št. prenosov: 4
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: korozija;alkalijsko-aktivirane malte;armaturno jeklo;elektrokemijska impedančna spektroskopija;rentgenska računalniška mikrotomografija;vizualna analiza;
Komentar vira: Nasl. z nasl. zaslona; Opis vira z dne 10. 12. 2021; Št. članka 7366;
Strani: str. 1-14
Letnik: ǂVol. ǂ14
Zvezek: ǂiss. ǂ23
Čas izdaje: 2021
DOI: 10.3390/ma14237366
ID: 19478719