Which of the following are considered special types of cement?

• A. All of these
• B. High Alumina Cement
• C. Expanding cement
• D. Acid-resistance cement

Answer: (A)

Special types of cement are formulations designed for performance beyond ordinary Portland cement. High Alumina Cement is a calcium aluminate cement that provides high early strength and good heat resistance, useful where rapid setting and high-temperature service are needed. Expanding cement is designed to undergo a controlled amount of expansion during hydration to counteract shrinkage and improve joint integrity. Acid-resistance cement is formulated with additives to resist degradation from acids, making it suitable for chemically aggressive environments. Because each of these meets a distinct performance goal, they all fall under the category of special cement types, so all of these are considered special types of cement.