FAQ

What is the advantage of Chemical Grout (Polyurethane)?

A key advantage of chemical/ permeation grouting is the ability to transform granular soils into sandstone like masses by filling the voids with a low viscosity, non-particulate grout with little to no disruption to the soil.


Is this system more cost effective?

It certainly is because it does not require demolitior and is significantly less labor intense. A simple 2″ diameter drill can cover an area up to 30 feet in diameter.


What is the delivery method?

A two part polyurethane material is delivered via a small 2 inch diameter drill made to reach the desired depth and mixes at the tip. The material hardens within seconds and fills the void. A single perforation can apply material to an area of 10′ to 30′ in diameter.


What would be the main difference with the current delivery methods?

Currently only grout can be delivered at depths below 10′ and polyurethane (foam) can only be delivered up to 7-10′. Our delivery method ensures that we reach the desired depth and does not allow the material to harden before we reach the affected area. Therefore our delivery method can be used not only to fix sinkholes, but can can fix dams or inject material into an underwater vessel that needs to be floated.


How long does the process take?

Every project is different and depends on the soil condition. However, due to the fact that there is no demolition required, this method can be delivered very quickly. Also, because our product reacts (hardens) within seconds (even on the presence of water and other solutions) the area is ready for traffic by the time we leave the premises.


Is there a specific material needed to be injected?

Absolutely not. In fact with polyurethane injection delivery, the engineers have the freedom to select the product or combination desired, depending on the soil condition and properties of the material required.


Is this process environmental friendly?

Yes indeed!. This system is less destructive and more environmental friendly than any current method. 1. Current (fast injection delivery used for less than 10′ deep) uses tubes that cannot be recovered and must be cut at surface and left buried. With our delivery method, the tubes used for injection are recovered. 2. The use of mortars and grouting suspensions is dangerous to the environment because the toxic components can pollute the karst aquifer and cause long lasting hazardous impacts on underground species.


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