Chemical Grouting is a form of
permeation grouting. Solution grouts that are commonly used include
acrylamides, polyurethanes, acrylates, epoxies and sodium silicates. There
are two major types of chemical grouting: structural and water control.
Structural chemical grouting, when used in granular soils, permeates the
spaces between the soil particles, binds the particles together, and
improves the soilís bearing capacity.
This process is not necessarily intended to restrict water
Structural grouting is also used to repair fractures in concrete and rock.
When injected into the cracks, the solution grout fills gaps with a powerful
adhesive, forms a waterproof bond, repairs the integrity of a rock or
concrete structure, and could be the least expensive means to seal joints
Water control chemical grout is frequently used to stop water movement in
granular soil or rock. Grout is injected under pressure and fills the spaces
between soil particles. This forms a waterproof mass at the injection point.
When injection points are laid-out in a well designed grid pattern, these
masses interconnect to form an underground curtain that prevents fluid
Water control chemical grouting is also widely used as an economical means
to stop leaks in mines, tunnels, underground tanks, elevator shafts, and
around underground conduits and pipes. Holes are drilled and grout is
injected along the flow paths, sealing flow paths and preventing water flow
through them. The work may be conducted from either the interior or exterior
of a structure, depending on access restrictions.