| 摘要 |
<p>The invention concerns a concrete wherein are dispersed metal fibres obtained by mixing with water a composition containing: a) a cement; b) fine elements with pozzolanic reaction; c) granular elements divided into two granular categories C1 gt; 1 mm and lt; 5 mm and C2 from 5 to 15 mm; d) cement additives; e) an amount E of water added in the mixture; f) a dispersing agent, and preferably a superplasiticizer; g) metal fibres in amount not more than 120 kg/m3 of concrete; the contents of the different constituents (a), (b), (C1), (C2), (d) and the amount of water E, expressed in volume, satisfying the following relationships: ratio 1: 0.50 le; (C2)/(C1) le; 1.20; ratio 2: 0.25 le; [(a)+(b)+(d)]/[(C1)+(C2)] le; 0.60; ratio 3: 0.10 le; (b)/(a) le; 0.30; ratio 4: 0.50 le; E/[(a)+(b)+(d)] le; 0.75; ratio 5: (d)/(a) le; 0.2. The invention is useful for making segments without reinforcements, slabs and panel-type elements, shells or the like.</p> |
