Chemical Grouting

Published: March 30, 2017 | Last updated: July 5, 2023

What Does Chemical Grouting Mean?

Chemical grouting is a pipe bedding, soil sealing and stabilization process. Chemical grouting permeates pore spaces in soil with grout that hardens into a sandstone-like mass. Chemical grouting is used create barriers to groundwater flow, provide a stronger foundation for structures, provide needed support for excavation, allow exfiltration of sewer joints, and to stabilize soil for tunneling.


Trenchlesspedia Explains Chemical Grouting

To apply chemical grout a sleeve port pipe is inserted and grouted into a pre-drilled hole to the desired depth. Next, a two-part water-based chemical grout is mixed and pumped into the ground. The grout then permeates the surrounding soil and hardens. The operator can adjust the mix type, flow rate, pressure and volume limits in real time. Chemical porting is relatively inexpensive and the chemicals and methods used can be adapted to a wide range of applications.


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