Overburdened treatment plants, increased treatment costs, surcharged lines and environmental pollution are the results of infiltration. For years, efforts to reduce or correct infiltration and its associated problems have concentrated on rehabilitating the mainlines, although manholes and other underground structures commonly account for 30 to 50 percent of a system’s infiltration.
Subsidence from traffic loading, shifting and expanding soils, temperature variation and cyclic ground water loading seriously weaken manholes and other sewer system structures. Over time, ground water will find its way through fatigue cracks and weakened joints, leading to further deterioration of the structure. Fallen bricks and mortar can block the sewer flow, and may eventually lead to collapse, seriously endangering the surface and surrounding environment.
Sulfide-rich effluents, a warm humid environment and long retention times create the perfect conditions for microbiologically induced corrosion (MIC). MIC, a result of an acid-producing bacteria known as Thiobacillus, is the principal cause of corrosion in a municipal sewer system. These microorganisms metabolize elemental sulfur oxidized from H2S sewer gas and produce sulfuric acid as a waste product which then attacks the substrate. This sulfuric acid can quickly destroy ordinary concrete-based materials in a municipal sewer system.
Strong-Seal® Systems offer a complete family of cost-effective engineered products, specifically designed to rehabilitate municipal concrete and masonry structures and effectively stop inflow, infiltration and exfiltration. The Strong-Seal® System is a patented process (Patent B15,002,438).
Strong-Plug is a rapid-set (60 seconds), hand-applied cementitious product for stopping infiltrating water and making repairs which require high early strength. Strong-Plug may be applied in a dry form directly to minor infiltration or mixed with water to a thicker consistency for application to more active leaks.
Strong-Seal® QSR is a rapid-set (10-15 minutes), high early strength, acid-resistant, hand-mixed and hand-applied, calcium aluminate based cement product for filling voids and repairing inverts in concrete, brick or other masonry-constructed structures.
