Abstract
Given the problem that steel bar corrosion easily causes cracking of recycled concrete in saline soil areas of Western China, a kind of ceramic recycled gradient concrete is proposed. The polarization curves of steel bars were measured after cracking. The corrosion products of steel bars were analyzed by scanning electron microscopy (SEM) and X-ray energy spectrometry (XPS). The mass fraction of corrosion products was calculated. The volume expansion rate of corrosion products was calculated using the Eighted-Averaging method. The results show that N-60 group ceramic regenerated gradient concrete has the best resistance to corrosion and expansion. The main components of steel corrosion products are Fe3O4, FeOOH, and Fe2O3, which are consistent with the products under natural conditions, and the content of Fe2O3 in the products is the highest. Based on the polarization curves and corrosion expansion rate of steel bars after corrosion, it can be inferred that in a saline soil environment, corrosion products are mainly composed of Fe3O4, FeOOH, and Fe2O3. An electric accelerated corrosion steel bar can simulate the corrosion condition in a natural environment and has good applicability.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call