Precast Polymer Concrete Prevents Sewer Gas Corrosion in Large Diameter Vortex Manhole Structures

Municipal wastewater collection systems are constantly exposed to sulfuric acid that is created by hydrogen sulfide out gassing.  This exposure to a low pH environment causes the Portland cement in the concrete to be compromised.  The standard means of protecting Portland cement concrete structures is using a coating or lining.  Polymer concrete does not require any coatings or linings to protect if from this corrosion.  This paper will demonstrate how a corrosion-resistant polymer concrete was utilized on a project to prevent the corrosion of three ten foot diameter precast structures that are approximately 110’ deep each.