Béton lourd

Le béton lourd est un béton de ciment avec une masse volumique supérieure à celle d'un béton normal.

Composition

Les bétons lourds sont fabriqués avec des granulats à haute masse volumique tel que la barytine, la magnétite et l'hématite pour atteindre des masses volumiques comprises entre 3 400 et 3 600 kg/m3.

Propriétés

En comparaison avec le béton normal, le béton lourd :

  • est plus cher ;
  • nécessite un matériel de malaxage adapté pour sa fabrication ;
  • nécessite le renforcement de son coffrage lors de sa mise en œuvre[1] ;
  • a généralement une résistance mécanique proche[2] ;

Utilisations

Les bétons lourds sont utilisés comme :

Références

  1. Daniel Montharry (Auteur), Michel Platzer, La technique du bâtiment tous corps d'état Relié, Éditions du Moniteur, 2014
  2. Georges Dreux, Jean Festa, Nouveau guide du béton et de ses constituants, Eyrolles, 1998 (8e édition)
  3. Jean-Michel Torrenti, Béton, Encyclopædia Universalis [en ligne], consulté le 10 juin 2017. URL : http://www.universalis.fr/encyclopedie/beton/

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