| 摘要 |
<p>A concrete in which metallic fibers are dispersed, obtained through mixing with water a composition including a cement; ultrafine elements with a pozzolanic reaction; granular elements distributed into two granular classes (C<SUB>1</SUB>)>1 mm and <5 MM AND (C<SUB>2</SUB>) ranges from 5 to 15 mm; cement additions; an amount of water E added in the mixture; a dispersant, and preferably a superplasticizer; metallic fibers, in an amount maximum equal to 120 kg per m<SUP>3 </SUP>of concrete, the contents of the various components (a), (b), (C<SUB>1</SUB>), (C<SUB>2</SUB>), (d) and the amount of water E, expressed in volume, meeting the following relationships: ratio 1: 0.50<=(C<SUB>2</SUB>)/(C<SUB>1</SUB>)<=1.20; ratio 2: 0.25<=[(A)+(B)+(D)]/[(C<SUB>1</SUB>)+(C<SUB>2</SUB>)]<=0.60; ratio 3: 0.10<=(b)/(a)<=0.30; ratio 4: 0.05<=E/[(a)+(b)+(d)]<=0.75; ratio 5: (d)/(a)<=0.20. The invention applies to the manufacture of voussoirs without frameworks, of tiles and of elements of the plate, shell type or the like.</p> |
