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Polyjacking may be defined as a concrete raising and leveling method that employs high-density geo-technical expanding foam to lift and stabilize concrete surfaces.
An identical process with an identical purpose is the process of mud jacking, which employs mud in place of foam to lift the concrete surface to the preferred level. It is also known as polyurethane concrete lifting or poly lift.
1. Polyjacking Cost
The average cost of Polyjacking varies from $5 to $25 per square foot.
2. Process of Polyjacking
The features of poly jacking are as follows:
i. In the process, holes are prepared over the depressed concrete slab, and high-density polyurethane foam is passed into the holes to seal the voids and cracks.
ii. Once injected, the polyurethane foam extends to 7 feet under each prepared hole. This expansion enables the lifting of the concrete slab while stabilizing the structure.
iii. The foam employed for the poly jacking process does not fail down over time, unlike the mud or slurry employed in the mud jacking process.
iv. Polyjacking can be employed for the following uses:
d. Garage and basement floors
e. Repair of office floors, sports arenas, warehouses, etc.
v. The holes prepared for the poly jacking process are smallish (⅝’’) compared to other concrete repair methods.
vi. The polyurethane foam material employed for the process is weightless compared to the mud-jacking slurry. Hence, they do not give pressure on the underlying soil.
vii. The process concerns drilling fewer holes to pass the foam material.
3. Advantages of Polyjacking
The main advantages of poly jacking in construction are:
a. Polyjacking controls the alternate of concrete surfaces, which is an expensive process. Hence, poly jacking is cost-effective in this case.
b. The curing process is quicker and the surface can be employed within a few hours.
c. The process keeps the compressive strength and structural integrity of the concrete surface.
d. It fills joints and cracks and controls future heaves.
e. The materials used in this process, Polyurethane is an environmentally friendly material created of (39 to 49) % renewable and recycled materials.
f. There is no concrete or grout splatter at the time of this process, making clean working surroundings.
4. Disadvantages of Polyjacking
The disadvantages of poly jacking are as follows:
a. Expensive Materials needed.
b. It’s difficult to seal all voids sufficiently due to the character of the foam.
c. In foam leveling has seen outbreaks and melting due to its chemical reactions and pressure build-up.
d. There is less control over where and how much the foam extends.
5. Difference Between Mudjacking and Polyjacking
The difference between Mudjacking and Polyjacking are as follows:
|Mudjacking may be defined as a concrete leveling method that applies to pump a material beneath a sunken concrete surface to raise it to the planned elevation.
|Polyjacking may be defined as a concrete raising and leveling method that employs high-density geo-technical expanding foam to lift and stabilize concrete surfaces.
|Mudjacking is less expensive.
|Polyjacking is expensive.
|A slurry mix made of Portland cement, topsoil, and water is used.
|Polyurethane foam is used.
|You must wait 24 to 72 hours before you can employ your slab.
|It is fast process.
|Larger holes are used for mud jacking.
|Dime-sized holes used for poly jacking are smaller than those used for mud jacking.
a. Is poly jacking better than mud jacking?
In general, mud jacking is a cheap and quicker choice than full concrete replacement but contains many demerits long drying time, and the potential for extra harm.
Polyurethane concrete lifting results in a longer-lasting and more rapid repair, and it is a more exact process than mud jacking.
b. How long does poly jacking last?
Generally, Poly jacking is durable that can last for 10 to 20 years or more than that because it is not susceptible to fracture or failure.
c. Is poly lift expensive?
Yes, Poly lifts are quite expensive than that mud jacking. The average cost of Polyjacking varies from $5 to $25 per square foot. Materials used in this process are expensive.
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Read Also: Mudjacking
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