High-wearing-resistant composite material comprising steel-based shot and method for producing said material

Composite material obtained by mixing with water a composition comprising:

• a hydraulic binder formed by cement having a tricalcium aluminate content less than 5% in weight with respect to the total weight of hydraulic binder,
• steel-based shot having a granulometric distribution comprised between 120 μm and 3000 μm,
• non-densified silica fume having a granulometry less than or equal to 2 μm,
• a water-reducing superplasticizer,
• wherein a ratio between a weight quantity of water and a weight quantity of hydraulic binder being comprised between 0.16 and 0.25, and
• wherein the composition comprises, for 100 parts in weight of hydraulic binder, between 250 and 800 parts in weight of shot and between 10 and 15 parts in weight of silica fume, so as to obtain a composite material having an abrasion index measured according to the C.N.R protocol comprised between 0.15 and 1.0,the shot having a value of a D10 grain size at least eight times greater than the value of a D90 grain size of the hydraulic binder.