Electrochemical responses and chloride ingress in reinforced Belite-Ye'elimite-Ferrite (BYF) cement matrix exposed to exogenous salt sources

Autor(es)

Koga, Guilherme Yuuki ^{[1, 2, 3]} ; Comperat, Paul ^[2] ; Albert, Blandine ^[2] ; Roche, Virginie ^[1] ; Nogueira, Ricardo Pereira ^{[1, 4]}

Afiliação do(s) autor(es)

^[1] Grenoble Alpes Univ, CNRS, LEPMI, F-38000 Grenoble - France

^[2] LafargeHolcim Res Ctr, 95 Rue Montmurier, F-38291 St Quentin Fallavier - France

^[3] Univ Fed Sao Carlos, Dept Mat Sci & Engn, Rod Washington Luis, BR-13565905 Sao Carlos, SP - Brazil

^[4] Khalifa Univ Sci & Technol, Dept Chem Engn, POB 127788, Abu Dhabi - U Arab Emirates

• Tipo de documento: Artigo Científico
• Fonte: Corrosion Science; v. 166, APR 15 2020.
• Citações Web of Science: 0

Resumo

Reinforced Belite-Ye'elimite-Ferrite (BYF) mortars cured for different times and exposed for 90 and 182 days to a chloride-rich solution (full immersion and dry/wet cycles) were compared to Portland equivalents in terms of porosity, corrosion, chloride ingress and sorptivity. The effect of fly ash addition was also considered. BYF- and Portland-embedded rebars remained passivated through 182-day testing. The apparent chloride diffusion coefficients were about 10(-12) m(2) s(-1), except for 28-day-cured BYF mortars containing fly ash, which exhibited higher values. The results contribute to a better assessment of durability issues concerning BYF matrices, indicating they can be a reliable alternative to Portland. (AU)

• Processo FAPESP: 19/02136-3 - Corrosão de ligas de alta entropia conformadas por spray
• Beneficiário: Alberto Moreira Jorge Junior
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional