Influence of CO2 Curing on the Alkali-Activated Compound Mineral Admixtures’ Corrosion Resistance to NaCl Dry–Wet Alternations

In this study, the influence of CO2 curing on corrosion resistance reinforced alkali-activated compounds is investigated. Fly ash (FA) and blast furnace slag powder (BFS) are used as mineral admixtures. The specimens were subjected to dry–wet alternations with 3% NaCl, simulate a concrete structure under environment. ultrasonic velocity, mass loss rate, electrical characteristics (such resistance, AC impedance spectra, area rates determined by Tafel curves) utilized determine degree corrosion. Scanning electron microscopy (SEM) X-ray diffraction (XRD) analyze mechanism. Results show that decreased addition FA but improved curing. When provided, BFS shows higher enhancing effect than FA. equivalent circuit diagram compound admixtures obtained spectra composed three elements (electrical capacitance in parallel) series. results adding can decrease rust’s iron oxides steel bars’ surface. Finally, found SEM photos, effectively improve compactness specimens. Meanwhile, roughness hydration increased