Probabilistic Service Life Prediction of Alkali Activated Concretes Exposed to Chloride Induced Corrosion

• DOI: 10.3151/jact.21.1020
• Publication Date: 2023-12-25T22:12:38Z
• Authors: Tamara Janey Chidiac; Neven Ukrainczyk; Dale P. Prentice; John L. Provis
• Keywords: Rebar; Service life; Reactivity; Alkali–aggregate reaction

In this study, the well-established service life design code defined in fib Bulletin 34 is adapted to predict time initiation of reinforcement corrosion alkali-activated concretes submerged marine conditions. The model approach based on probabilistic calculation needed for a critical concentration chloride ions, migrating from external environment towards rebar, accumulate at surface steel and initiate reaction. information required define parameters derived literature data, relating concrete mix designs with accelerated laboratory test results. findings indicate that high calcium content can exhibit promising characteristics as construction material applied structural application chloride-rich corrosive environments. adopted provides opportunity assess influence variability mineralogical composition reactivity precursors alkaline activating solution, chemical evolution microstructure binder matrix. predicted quite sensitive these factors, very lives some but rather short others, must be incorporated into any engineering assessment future performance.