Architecture Engineering and Science

The durability of recycled aggregate concrete in harsh environment is faced with problems such as low strength, poor permeability resistance and insufficient freezing resistance, mainly due to the surface roughness and high porosity of recycled aggregate. This paper can improve the quality of the recycled aggregate, improving the aggregate treatment method and designing the concrete ratio reasonably. The use of admixture and admixture, fly ash, mineral powder and gas guiding agent, help to improve the freezing resistance, impermeability and chemical corrosion resistance of concrete. Scientific construction and curing methods play a key role in the long-term stability of concrete. These technical means can effectively improve the application performance of recycled concrete in the harsh environment.