Cement additives are materials added to cement during the mixing process to enhance its properties. These additives can improve the strength, workability, and durability of the cement, making it more suitable for various construction applications. Common types of additives include plasticizers, which help improve flow, and accelerators, which speed up the curing process. Using cement additives can lead to better performance in different environmental conditions. For instance, waterproofing agents can make cement resistant to moisture, while air-entraining agents can improve freeze-thaw resistance. Overall, these additives play a crucial role in modern construction practices.