jailcd2024044: Corrosion Resistance Reinforcement of Concrete Containing Thermally Modified Fly Ash under the Cyclic Accelerated Carbonation and Water Absorption Test

Abstract

The corrosion resistance reinforcement in carbonated concrete containing thermally modified fly ash (TMFA) was evaluated under actual environmental conditions. The air permeability, water absorption, and reinforcement corrosion status of the concrete specimens with embedded reinforcing bars were investigated through cyclic accelerated carbonation and water absorption tests. The results show that the development of carbonation of concrete containing TMFA is faster, and its air permeability coefficients are slightly higher than those of plain concrete. Conversely, the higher the TMFA replacement rate, the higher the concrete resistivity, the lower the water absorption rate and the corrosion current density, which means that the reinforcement corrosion resistance is high.