Ground corrosion. Hot dip galvanized or not coated steels in contact with natural backfill materials (soils).

1 OBJET ET DOMAINE D'APPLICATION 4

2 RÉFÉRENCES 4

3 DÉFINITIONS DES TERMES SPÉCIFIQUES 5

4 MATÉRIAUX 5

4.1 Matériaux de remblai 5

4.2 Aciers au carbone - Revêtement 6

5 SITE D'IMPLANTATION DES OUVRAGES 6

6 HOMOGÉNÉITÉ DU REMBLAI 6

7 CRITÈRES CHIMIQUES ET ÉLECTROCHIMIQUES D'ACCEPTATION D'UN MATÉRIAU DE REMBLAI 6

7.1 Résistivité 6

7.2 Activité en ions hydrogène ou "pH" 7

7.3 Teneur e n sels solubles 7

8 ÉPAISSEUR D'ACIER RÉSERVÉE (SACRIFIÉE) AUX PHÉNOMÈNES DE CORROSION 7

9 ÉPAISSEUR NOMINALE MINIMALE 8

10 CONTRÔLE DE QUALITÉ DES MATÉRIAUX DE REMBLAI 8

10.1 Épreuve d e qualification 8

10.2 Épreuves de contrôle de conformité 8

1 1 BIBLIOGRAPHIE 8

ANNEXE A - Détection de la présence de sulfures dans les sols 9

ANNEXE B - Mesure de la résistivité du matériau de remblai à saturation 10

B.1 - Principe 10

B.2 - Matériels 10

B.3 - Mise en oeuvre 10

ANNEXE C - Extraction par l'eau des sels solubles présents dans les matériaux de remblai 13

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