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vibration.pptx
1.
Vibration des bétons Réalisé
par RACHID ZAIDI ABDERRAHIM HMAIMOU
2.
PLAN vibration
3.
Définition vibration compacité
4.
Rôle de la
vibration gravillons fines
5.
mortier enrobage des armatures homogène
6.
Les effets de
la vibration Sur le béton frais
7.
Paramètres de la
vibration Énergie Fréquence Durée – 5 secondes pour les bétons mous; – 20 secondes pour les bétons plastiques; – 1 minute pour les bétons fermes.
8.
Les matériels de
vibration vibration interne vibration externe
9.
• Les vibrateurs
externes : Les vibrateurs de coffrages
10.
11.
12.
13.
• Les vibrateurs
externes • Les vibrateurs de coffrages
14.
• Les vibrateurs
de surface
15.
16.
Règles de la
vibration – le béton cesse de se tasser; • – le dégagement de bulles d’air s’arrête; • – la laitance apparaît en surface
17.
Conclusion
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