Chemical Grouting Uses
We perform chemical grouting for two primary purposes: water control and soil strengthening.
Because chemical grouts are lower viscosity and slower reacting then most plural component polyurethanes, they excel in seeking out and sealing small water passages. This includes the void space between soil particles and cracks in structures. Due to their ability to permeate soils, chemical grouts can also be used to increase the bearing capacity of weak soils by binding soil grains together.
Chemical grouting for soil strengthening is generally referred to as permeation grouting. Permeation grouting involves saturating soils with grouts which bind soil particles together in order to increase their bearing capacity, reduce their ability to erode, or otherwise change their physical characteristics.
Types of Chemical Grouts
We install both prepolymer grouts (expansive) and acrylic grouts (non-expansive).
Prepolymer Chemical Grouts
We install prepolymer chemical grouts, which are expansive. Expansive chemical grouts react with moisture in the soil or environment and expand up to 30 times. This allows them to cut off fast-flowing water, and treat larger volumes of soil per gallon than non-expansive grouts, such as acrylics.
Acrylics, such as acrylate and acrylamide, are non-expansive grouts. They are primarily composed of water, so have the lowest viscosities. However, acrylic grouts do not expand, so more material has to be pumped relative to prepolymer grouts to treat the same volume of soil. Soils treated with acrylics tend to have lower strengths than soils treated with prepolymers, so facilitate future excavation.