What type of cement offers high resistance to sulfur?

Type V Cement is specifically formulated to offer high resistance to sulfate attack, making it the correct answer for this question. It is designed for use in environments where exposure to soil or groundwater with high levels of sulfur compounds is present. This type of cement contains a lower amount of C3A (tricalcium aluminate), which is the compound in cement that reacts adversely with sulfates, leading to deterioration and strength loss over time.

In contrast, other types of cement have varying compositions and are intended for different environmental conditions. Type I Cement is general-purpose and does not offer special resistance to chemical attack. Type III Cement is used for its high early strength and is not specifically designed for sulfur resistance. Type IV Cement is designed to produce low heat of hydration but similarly lacks the specific protective properties against sulfates that Type V Cement provides.

Understanding the chemical and physical properties of different cement types helps in selecting the appropriate cement for specific construction requirements, especially in regions susceptible to sulfate exposure.