What is High Early Strength and Rapid Hardening Cement?
The requirement of these types of cement arise when a rapid strength development is required like if form work has to be removed or reused after a short time or when sufficient strength is required for further construction in slip forming. In all such cases the cement used should develop the required strength as soon as possible. These types of cement are made by grinding of clinker with more fines or by altering the quality of clinker with high C3S and C3A content. Since rapid strength gain is usually associated to high rate of heat development, this kind of cement should not be used in mass concrete or in large structural sections.
