Corrosion behavior of steel in alkali-activated fly ash mortars in the light of their microstructural, mechanical and chemical characterization
- Resource Type
- Authors
- Cristina Chiavari; Stefania Manzi; Andrea Balbo; Maria Chiara Bignozzi; F. Zanotto; Maria Elia Natali; Cecilia Monticelli
- Source
- Subject
- Materials science
D. Chloride
0211 other engineering and technologies
Mechanical properties
02 engineering and technology
B. Microstructure
C. Mechanical propertie
Chloride
Corrosion
C. Corrosion
021105 building & construction
medicine
General Materials Science
Composite material
Polarization (electrochemistry)
Porosity
Microstructure
Cement
Metallurgy
Ambientale
Building and Construction
D. Alkali activated cement
021001 nanoscience & nanotechnology
Alkali activated cement, Corrosion, Chloride, Mechanical properties, Microstructure
Fly ash
Materials Science (all)
Mortar
0210 nano-technology
medicine.drug
Alkali activated cement
- Language
- English
This study concerns the corrosion behavior of steel in different room temperature cured alkali-activated fly ash mortars exposed to chloride solution. The corrosion process was monitored by polarization resistance and corrosion potential measurements and the results were interpreted in the light of a complete microstructural, mechanical and chemical characterization of the mortars. The most compact alkali-activated mortars have higher porosity and lower mechanical properties than a cement-based mortar (CEM), but the protectiveness afforded to the rebars is slightly higher than that obtained in CEM. The reason for this discrepancy is connected to a lower chloride content accumulated in the former mortar type and to a specific inhibition of the rebar corrosion afforded by the pore electrolyte in alkali-activated mortars.