Services: Rehabilitate - Chemical Grouting
mainline joints, manholes and service connections
Mainline Joints
Chemical grout forms a waterproof collar around leaking pipes.
Chemical grouts do not stop sewer leaks by simply filling joint sand cracks. Instead, grouting chemicals are forced into the surrounding soil where they gel with the soil into a waterproof mass which cannot be extruded back into the sewer system. This water-tight collar adheres to the outer surface of the pipe where it will stay indefinitely unless removed by excavation or exposed to the sunlight for long periods of time. If groundwater pressures increase, the collar will be pressed even more tightly against the structure, increasing its ability to stop leaks.
Manholes
Grout ensures structurally sound underground manholes.
Chemical Grouting is used to control inflow and infiltration in structurally sound underground manholes, wet wells, vaults and tanks. Holes are drilled through the wall of the structure near the leaks and grout is pumped to the outside of the structure. As the grout is pumped, it flows and reacts with water forming a gelatin-like mass. This mass provides a seal on the positive side of the leak insuring a long term repair.
Service Connections
Grout can stop the leaks other processes miss.
Many trenchless processes are available for structural rehabilitation of pipelines but they also require chemical grout. It is now recognized that full-length liners seldom reduce infiltration by more than 50%. Groundwater which cannot enter through joints and cracks can quickly migrate to service connections. Sealing these potential entry points with chemical grout can stop leaks completely and allow you to realize the maximum benefit from your rehabilitation investment.
Service lines and connection can be sealed cost-effectively.
Service laterals are often a source of significant infiltration but, without chemical grout, it is seldom cost-effective to stop the leaks. It usually costs less to treat the groundwater than to stop infiltration in these lines. However, chemical grout is so economical and effective that a positive return on an investment can be realized. Studies have shown that most infiltration into service lines occurs within a few feet of the main. There are two reasons for this: All except the last few feet of service lines are usually above the water table, and groundwater flows easily in the backfill of a mainline trench because of the French drain effect.
