TY - JOUR AU - Lekatou, Angeliki AU - Tsouli, Sofia AU - Nikolaidis, Christos AU - Kleftakis, Spyridon AU - Tragazikis, Ilias AU - Matikas, Theodoros PY - 2019/09/02 Y2 - 2024/03/28 TI - Effect of fly ash on the corrosion performance and structural integrity of stainless steel concrete rebars in acid rain and saline environments JF - Frattura ed Integrità Strutturale JA - Fra&IntStrut VL - 13 IS - 50 SE - SI: Research activities of the Greek Society of Experimental Mechanics of Materi DO - 10.3221/IGF-ESIS.50.36 UR - https://www.fracturae.com/index.php/fis/article/view/2611 SP - 423-437 AB - <p>The corrosion behavior of 304L stainless steel rebars in an alkaline solution simulating new concrete subjected to acid rain attack and a mildly to slightly acidic solution simulating corroded cover concrete that ex­posed the reinforcement to direct acid rain attack, was investigated by reverse polarization. Both solutions contained Ca(OH)<sub>2</sub> and fly ash (0-25 wt.% of the dry mixture). Concrete cubes containing 0-25 wt.% fly ash and reinforced with 304L rebars were subjected to salt spraying for 4 m. Although the polar­ization behaviors in the two electrolytes were different, the relative trends with respect to the fly ash contents were similar. The beneficial effect of fly ash (up to 20 wt.%) on the corrosion resistance of 304L rebars was de­mon­strated. How­ever, a deteriorating effect was realized at 25 wt.% addition. Partial re­placement of cement by fly ash did not significantly affect the tensile properties of the 304L rebar before or after 4 m of salt spraying. The elastic modulus and percent elongation presented a slight decrease after 4 m of salt spraying, ir­respectively of FA content. Corrosion-wise, 304L can replace 316L stainless steel provided that FA has been added to the concrete mixture, even at low contents (10 or 15 wt.%).</p> ER -