Rapid Hardening Portland cement (RHPC):
This cement is similar to Ordinary Portland cement but with higher tri-calcium silicate (C3S) content and finer grinding. It gains strength more rapidly than OPC, by the final strength is only slightly higher. This type of cement is also called as High-Early Strength Portland Cement. The one-day strength of this cement is equal to the three-day strength of OPC with the same water-cement ratio.
Following are the benefits of the rapid hardening portland cement:
(a) It is used whereas formwork has to be removed as early as possible in order to reuse it.
(b) It is used whereas high early strength is required.
(c) It is commonly used for constructing road pavements, where it is important to open the road to traffic quickly.
(d) It is used in industries that manufacture concrete products like slabs, posts, electric poles, block fence, etc. because moulds can be released quickly.
(e) It is used for cold weather concreting since rapid evolution of heat during hydration protects the concrete against freezing.