PATENTS

摘要

(22) 19.04.2016 (43) 27.02.2019 (57) Portland cements of type and category CEM I 52.5 R are described according to standard UNE-EN 197-1 and which additionally have a granulometric distribution with a Blaine fineness greater than 6500 cm~2/g, a tricalcium silicate content, C_3S, greater than 55 % by weight and a tricalcium aluminate content, C_3A, greater than 4 % and less than 2 5 % by weight and with a sum of both greater than 75 % with a strength according to UNE 196-1 at 1 day greater than 40 MPa and at 28 days greater than 65 MPa. It also describes mixtures of these cements with a common cement according to standard UNE-EN 197-1, which present high mechanical performance at short ages, as well as the procedure for obtaining these mixtures and their use in the manufacture of cement derivatives, such as concretes, mortars and slurries.