The acid sulfate soil areas in duced inreinforced concrete in the Cuu Long river delta account for approximately 60 percent of the total area, with the pH ranging from 3.0 - 6.5. While saline soil areas account for 27 percent of the total area. The average sulfate concentration is approximately 400mg/l
sodium chloride concentration varies from 4 to 30 g/l. These environment conditions can cause corrosion in reinforced different levels. The experimental results showed that the strength and permeability of concrete changing with the time. In acidic and saline environments inthe first nine months, the strength of concrete increases while its permeability decreases. After that period, these two parameters change in a reverse way. The quality of concrete in acidic environment tends to decline more than that in saline environment. The change levels of permeability and strength of concrete depend on the water-cement ratio.