How does concrete raising work?
Benefits of Polyurethane Concrete Raising vs. Mudjacking
A plan which includes the controlled lift of a slab achieves a more precise result by applying expansive polymer foam just beneath the surface of the slab. This process eliminates the failing condition as well as seals and stabilizes all defective joints and sources of water penetration from further erosion. The variety of soils and substrates across the Front Range are often the root of the problem. Liftech’s system treats the soils and addresses the water and erosion issues. The average life cycle of concrete is extended at a fraction of the cost of replacement.
Until recently, mudjacking has been the method more commonly used for lifting fallen concrete and is still a widely acceptable form of restoration. Mudjacking and polyurethane achieve similar results, at least initially, however the process by which those results are achieved and the extended performance of the two products are completely different.
Don’t Make the Mudjacking Mistake!
Mudjacking uses a mixture of sand and water infused with a small amount of Portland cement which helps the material solidify. The sand and water mixture is pumped through pop can size (2 inch) holes in the concrete using hydraulic pressure to lift the sunken concrete. This mixture is considered a structural fill and is very heavy, weighing an average of 100-110 pounds per cubic foot of material.
In areas of wet and unstable soils, mudjacking material can add additional, unwanted weight and water to an already wet and failing substrate.In the likely event that there is moisture present in the area where the slurry mixture is placed, over time that slurry mixture may have a tendency to absorb the moisture, causing it to weaken, break down, sluff off, and eventually become part of the failure. Mudjacking can be an effective solution, but in most cases it is only a temporary band aid.
Liftech is a Better Alternative!
Polyurethane concrete raising consists of an environmentally safe liquid polymer foam that is injected through penny-size holes in the concrete and into the loose, unstable soils below. Through a chemical reaction the high density foam expands to stabilize the loose soils and lift the fallen concrete. After approximately 15 minutes the polyurethane material is fully cured and ready to return to service. The polyurethane only weighs about 2 pounds per cubic foot of material which doesn’t add any additional, unwanted weight to an already failing substrate. Polyurethane foam is an inert, non-toxic, environmentally safe material that is made from 100% recycled materials. It is impervious to moisture or decay ensuring that over time will not only be environmentally friendly, but your repair will last a lifetime.
After the repair is completed, the small holes in the concrete where the material was injected need to be filled. Unlike the 2 inch holes drilled for mudjacking, Liftech’s polyurethane system utilizes a much smaller, 5/8″ hole (about the size of a penny), and those holes are filled with a cementious grout to match the surrounding concrete.
The Advantages of Liftech vs Mudjacking
- IT LASTS A LIFETIME!
Polyurethane cures as a solid, impermeable structure which adheres to the concrete. Mudjacking is based on a sand and water mixture making it susceptible to fracture and recurring failure.
- SOIL STABILIZATION!
Liftech raises your concrete AND stabilizes the underlying soil to prevent future failure. Mudjacking adds water and sand to already wet and failing soils.
- LESS INVASIVE!
Liftech uses controlled injections in penny-size holes to raise your concrete quickly and effectively. Mudjacking requires numerous large holes and can be very messy and aggressive!
- LIGHT WEIGHT!
Polyurethane weighs about 2 pounds per cubic ft. Mudjacking material weighs over 100 pounds per cubic foot, which adds a tremendous amount of weight to an already burdened substructure.
- IT’S FAST!
Polyurethane cures within minutes with your concrete ready to use again when we leave the job! Mudjacking can take days.
- MOTHER NATURE’S ENEMY!
Unlike mudjacking, our product creates a barrier to moisture, chemicals, insects, rodents, additional ground movement and erosion.
This is a time lapse video illustrating a repair that was performed on a front porch step with severe settling. The repair took approximately 30 minutes and the porch was usable the same day.
This video demonstrates a repair performed on a 15 foot by 45 foot low spot on Hwy 141. The Hwy was down 2-1/2 inches at the lowest point and the majority of the repair took approximately 40 minutes.