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Leak Control in Wastewater Lateral Joint Using a Polymer Grout
The EPA estimates that major increase in inflow and infiltration (I/I) is caused by the leaking residential laterals. Several types of grout materials have been used in controlling I/I problems in wastewater systems and storm systems. In this study, a test protocol was developed by the Center for Innovative Grouting Materials and Technology (CIGMAT) and was approved by the USEPA to evaluate the performance of polymeric grout used in the rehabilitation of lateral joints in wastewater facilities and to quantify the infiltration at pipe joints using a combination of model and laboratory tests. The polymer grout was used to control the leak of over 1000 gallons/day at a leaking lateral joint. For the leaking joint model test, 203-mm (8-in.) diameter leaking pipe joints were used in soil box. The grout used in this study was characterized using the working, physical, mechanical and durability properties. It was observed that the polymeric grout, which had a gelling time of 24.5 seconds, was impervious to water when grouted in soil when the hydraulic gradient was 100. The durability test results showed that the grouted sand was extremely resistant to varied chemical environments and the strength deterioration was negligible for a period of one month. The grout was effective in reducing the discharge from over 1000 gpd (4940 liter/day) to zero at hydraulic pressures of 3, 4 and 5 psi (21 to 35 kPa). The large scale model test was simulated using a numerical finite element model which predicted the results well.
Leak Control in Wastewater Lateral Joint Using a Polymer Grout
The EPA estimates that major increase in inflow and infiltration (I/I) is caused by the leaking residential laterals. Several types of grout materials have been used in controlling I/I problems in wastewater systems and storm systems. In this study, a test protocol was developed by the Center for Innovative Grouting Materials and Technology (CIGMAT) and was approved by the USEPA to evaluate the performance of polymeric grout used in the rehabilitation of lateral joints in wastewater facilities and to quantify the infiltration at pipe joints using a combination of model and laboratory tests. The polymer grout was used to control the leak of over 1000 gallons/day at a leaking lateral joint. For the leaking joint model test, 203-mm (8-in.) diameter leaking pipe joints were used in soil box. The grout used in this study was characterized using the working, physical, mechanical and durability properties. It was observed that the polymeric grout, which had a gelling time of 24.5 seconds, was impervious to water when grouted in soil when the hydraulic gradient was 100. The durability test results showed that the grouted sand was extremely resistant to varied chemical environments and the strength deterioration was negligible for a period of one month. The grout was effective in reducing the discharge from over 1000 gpd (4940 liter/day) to zero at hydraulic pressures of 3, 4 and 5 psi (21 to 35 kPa). The large scale model test was simulated using a numerical finite element model which predicted the results well.
Leak Control in Wastewater Lateral Joint Using a Polymer Grout
Vipulanandan, C. (author) / Sunder, S. (author)
Pipelines 2013 ; 2013 ; Fort Worth, Texas, United States
Pipelines 2013 ; 588-598
2013-06-11
Conference paper
Electronic Resource
English
Grouting , Installation , Trenchless technology , Safety , Infiltration , Inflow , Risk management , Joints , Pipes , Leakage , Rehabilitation , Polymer , Pipelines
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