Acrylic grouts are exceptionally low viscosity (below 10 centipoise), whose reaction profiles can be controlled onsite, and which do not expand. Acrylic grouts are hydrophilic. Cured acrylic grout is up to 75% water. Therefore, acrylic grouting is best suited for use in damp or wet environments.
There are two general classes of acrylic grouts; acrylamide, and acrylate. CJGeo performs acrylic grouting with acrylate.
Composition
The following components make up acrylic grouts:
- resin
- water
- salts, to control set time
The ratio of resin to water controls the consistency of the finished product.
Straight resin pumped 1:1 with water will yield a gummy bear/soft silicone consistency finished product. Resin cut 1:1 with water and then pumped 1:1 with water will yield a cooked egg white consistency finished product.
Placement
Acrylic grouts are pumped separately up to the injection point. Similarly to our CJGrout geotechnical polyurethanes. A mixing head designed to ensure through mixing between the two sides then mechanically hooks to injection tubing or ports to place the material.
acrylic grouts do not expand, and are barely more viscous than water. Their low viscosity allows them to be pumped relatively quickly, without fracturing the treatment zone.
Typical Acrylic Grouting Repairs
Acrylic grouts are excellent for permeating fine grained soils, binding them together, and significantly reducing their permeability. Unlike soils treated with single component polyurethane resins, soils grouted with acrylics are generally easily hand excavatable.
Acrylic grouts are generally chosen because of their very low viscosity. Viscosities similar to water allow acrylics to penetrate very tight cracks, and also to follow very fine water flow channels.
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