Study on the Performance Improvement of Concrete Based on Protective Agent in Harsh Environment

The damage of structural safety of concrete is very large in harsh environment. Various properties of concrete can be improved by daubing protective agent on the surface of concrete. Influence of the protective agent on the impermeability and frost resistance and compressive strength of concrete is analyzed and determined by establishing experiment model and selecting protective agent. It is shown that protective agent can improve significantly the properties of concrete and the penetration depth reduces by 70%; cycle time of freeze-thaw raise by more than 60%; the strength increases from 6% to 15%.