CEMEX Rapid

CEMEX Rapid is a CEM I Portland Cement designed to give a considerably greater rate of strength gain than CEMEX Portland, making it ideal for the cost-effective production of pre-cast concrete. Portland cement is manufactured by burning a precisely specified mixture of raw materials containing Lime, silica, alumina and small quantities of other materials to form a clinker. The clinker, together with calcium sulfate to control setting, is then ground to produce cement of the required fineness. Up to 5% of minor additional constituents (typically, Limestone, fly ash or granulated blastfurnace Slag) may be incorporated at the grinding stage. CEMEX Rapid is made from the same clinker as CEMEX Portland but the product is more finely ground in order to promote greater reactivity. CEMEX Rapid delivers higher early strength without significant reduction of setting time or the workable period.