Which type of concrete is an appropriate choice for use in conditions with high sulfate exposure?

Type II concrete is specifically formulated to be more resistant to sulfate attack, which is particularly important in environments where concrete may be exposed to high levels of sulfates, such as in soil or groundwater. This type of concrete contains a lower percentage of tricalcium aluminate, which is the component particularly vulnerable to sulfate attack. By reducing this component, Type II concrete has an improved durability in sulfate-rich environments.

Additionally, while other types of concrete can be used in various applications, they do not offer the same level of resistance to sulfates. Type I concrete is a general-purpose mix, Type III is high-early-strength concrete, and Type IV is intended for use in massive structures where low heat of hydration is important. These options may not perform optimally in conditions where sulfate exposure is a concern. Therefore, Type II concrete is the most suitable choice in such conditions.