Research on Corrosion Damage and Bearing Characteristics of Bridge Pile Foundation Concrete under a Dry-Wet-Freeze-Thaw Cycle

Table 2

Content of ions in the water.

Types of water	Soluble salt content (mg/L)			pH value
	SO4^2−	HCO^3−	Cl^−
Ground water	2400.0	392.2	18818.8	7.0
Surface water	720.6	454.7	8498.7	7.0