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Q. Show the process of Waterproofing for bridge decks?
Waterproofing materials such as membranes are applied on top of bridge deck surface since:
(i) Vehicular traffic (for exampletanker) CAN carry dangerous chemicals and leakage of such chemicals in absence of waterproofing materials can endanger the life of bridges. Chemicals easily penetrate and cause the deterioration of concrete bridge decks.
(ii) In a number of countries where very cold weather is frequently encountered, salt can be applied for defrosting purpose. In case waterproofing isn't provided, salt solution penetrates through concrete cracks of bridge and causes corrosion of reinforcement.
(iii)In the event of cracks appearing on concrete deck, water penetrates bridge deck and brings about steel corrosion.
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