Problem: Heavily nitrated water from adjacent farm fields was lying with the corrugations of the sub-culverts and was oxidizing the HDG at an accelerated rate.
These culverts were heavily pitted and were in danger of perforation.
These culverts were heavily pitted and were in danger of perforation.
Surface preparation
• Brushing out soil before blasting
• Hydro-blast: to remove all mud and salts
Application of ZINGA to 140 µm DFT
Gallery
