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Corrosion in concrete sewers is caused by a) septic conditions b) dissolved oxygen c) chlorine d) nitrogen

Engineering Concrete Civil Engineering
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Question added by Mohamed Galal Hussein Ahmed Mohamed , Technical Mnager , Fast Building Contracting Co.
Date Posted: 2015/02/25
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Amgad mutasium Eisa
by Amgad mutasium Eisa , Site Engineer , Lamizone

a) septic conditions

Gaseous H2S - which produced through series of reactions in the waste-water acidified surface moisture in head-spaces of enclosed or covered structures,

causing acidic corrosion of concrete or metal surfaces.

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