Study on the Durability of Air Entrained Concrete after Long-term Soaking in Multi-Salt Solution

摘要

The concrete structures have been long-term corroded by soluble salts in the salinized soil, which was simulated by the way of concrete being soaked in multiple salts solution, then the failure law and mechanism of concrete was studied in this paper. The results show that salt crystallization happens on the exposed parts of concrete, the quality loss rate of concrete takes on the reduction-growth trend and the relative dynamic elastic modulus takes on the reduction-growth trend, the salt corrosion resistance of air entrained concrete is better than that of non-air-entrained concrete after long-term soaking in multiple salts solution. The failure mechanism of concrete is the result of interaction between the physical damage of salts crystallization and chemical erosion, but the former is much easier to implement than the latter.