CEMENT MATERIAL WITH HIGH MECHANICAL PERFORMANCES USEFUL FOR PRODUCING UNDERGROUND JUNCTIONS

摘要

A new cement composition is described, comprising a hydraulic binder, preferably of the sulfoaluminous type, a superfluidifying agent, and an aggregate obtained by mixing together at least two fractions, in amounts similar or equal to each other, having an average diameter Xo 0.5 and at least two fractions, in amounts similar or equal to each other, having an average diameter Xo o 0.5 represent from 20% to 50% by weight of the total aggregate; those with Xo 0.5 represent the remaining 50-80% by weight of the total aggregate. Said composition, suitably added with water, forms mortars with high fluidity / spreadability / pourability, particularly suitable for forming articles of manufacture by pouring; these articles of manufacture are characterized by high values of mechanical resistance and, if possible, also of acid resistance. The preferred articles of manufacture obtainable from the composition are junctions and tubes, even with small thickness, useful in the preparation of underground ducts, in particular sewer ducts.