Which cement type is specifically designed for high early strength?

Type III (high early strength) cement is specifically formulated to achieve strength quickly, making it ideal for projects that require rapid curing. This type of cement contains a higher proportion of clinker and a lower percentage of gypsum compared to other types, allowing it to set and gain strength faster. Its properties make it particularly useful in applications such as precast concrete products, fast-track construction, and during cold weather when rapid strength gain is necessary.

In contrast, Type I cement is the general-purpose cement suitable for most applications but does not emphasize high early strength. Type II cement offers moderate sulfate resistance but is not designed for quick strength development. Type IV cement is low-heat cement, advantageous for massive structures where reduced heat of hydration is needed, but it does not focus on early strength gain. Thus, Type III cement stands out due to its design for high early strength, making it the correct answer.