Patent ID: 7628852
Filing Date: 2009-12-08
Classification: C04B,Y02W

Abstract:
1. A dry premix for preparing a pourable mortar with a high degree of fluidity comprising a hydraulic binder, finely ground slag, a fluidifier and/or superfluidifier, a setting regulator, and aggregates, wherein: (i) 75-95 wt % of the aggregates are made of three monogranular fractions A, B, C, having a characteristic grain diameter increasing progressively from A to B to C; (ii) the ratio between the characteristic grain diameters of the fractions C and B is comprised between 2.2 and 3.2; (iii) the ratio between the characteristic grain diameters of the fractions B and A is comprised between 2.2 and 3.2; (iv) the remaining 5-25 wt % portion of aggregates consists of a fourth fraction D having a lower monogranularity than fractions A, B, C, and a characteristic grain diameter not lower than 0.1 mm; and (v) fraction A consists of at least 40 wt % of the total aggregates in the dry premix.