究其原因主要是在这种复合环境下混凝土构件表面的水分蒸发速率增大，造成水

The main reason is that the moisture evaporation rate on the surface of concrete components in this composite environment increases, which reduces the degree of cement hydration, deteriorates the pore structure, and ultimately reduces the corrosion resistance and durability of concrete structures and shortens their service life.

The main reason is that in this composite environment, the water evaporation rate on the surface of concrete components increases, resulting in the reduction of cement hydration degree and the deterioration of pore structure, which eventually leads to the reduction of corrosion resistance durability and service life of concrete structures.<br>

The main reason is that the evaporation rate of water on the surface of concrete members increases in this composite environment, which leads to the decrease of hydration degree of cement, the deterioration of pore structure, and finally the decrease of corrosion resistance and durability of concrete structures and the shortening of service life.