No. Polyurethane is durable. The use of polyurethane floor lifting can remain stable for at least 10 years without shrinkage and deterioration, which invisibly reduces the rework rate.
What is polyurethane slab lifting?
Polyurethane slab lifting technology was born in 1970. Its original origin was Finland. Because of its fast and convenient characteristics, it has been widely used in various countries around the world. So far, about 50 countries have used this technology to repair and maintain roads. This method is mainly aimed at buildings with different types of foundation settlement, providing non-interference foundation settlement engineering solutions, such as using innovative geopolymer technology to improve and reinforce the soft soil under the foundation, thereby stabilizing the foundation and accurately lifting the settled foundation or floor.
Why use polyurethane for slab lifting?
There are two very important parts in infrastructure projects, namely bridge building and road construction. Why do you say that? Because only by building bridges and roads can the two places communicate, and people in the two places can create greater economic benefits through transactions and other activities.
There are many ways to build roads, but it does not mean that the road is built once and for all, because the road will age and crack during use. The traditional maintenance method is particularly troublesome to repair the road, which often takes more than ten days, and vehicles have to detour during this period.
To address this problem, a new road construction method has emerged. This method only requires drilling a hole in the road surface and injecting polyurethane into it. The process is extremely fast, and the road can be put into use immediately after grouting is completed. It does not have a big impact on traffic like traditional road construction methods.
Traditional road construction methods have high rework rates, long time consumption, and limited foundation materials. Polyurethane slab lifting just overcomes these problems. First of all, its construction process is very simple and fast. It only requires relevant technicians to quickly check the ground, then choose a suitable location to start drilling, and then inject special polyurethane raw materials. After waiting for a while and seeing the slurry harden, the roadblocks can be removed and the road can be restored.
The advantages of polyurethane slab lifting are strong durability. Its materials can remain stable for at least 10 years without shrinkage and deterioration, which invisibly reduces the rework rate. Grouting materials are also lightweight, fast hardening, expansion, strength, low pollution, and controllability.
It can be said that the material used in this technology not only looks like foam, but is actually very light, and its density is much lower than asphalt or cement slurry. However, after injection, it can expand quickly to fill the gap below, and it only takes about 15 minutes from expansion to hardening.
Spc slab lifting raw materials
SPC has specially researched a kind of rigid polyurethane foam raw material for polyurethane slab lifting projects. Our raw material has multiple properties, such as acoustics, electricity and even physical mechanics. It will not deform significantly under limited pressure, so it has strong pressure resistance, so there is no need to worry that the vehicle will collapse the foam filled underground. However, it should be pointed out that once the pressure exceeds the limit, it will still change, and this phenomenon is irreversible.
The raw material of Spc slab lifting is a closed-cell structure. It is basically non-conductive, low in density, strong in hardness, and has obvious anti-seismic effect. It is perfect for road foundation filling. Its closed-cell rate is as high as 95%, and its thermal conductivity is extremely low, so it can be used as a thermal insulation material. After mixing it with concrete, cement and other materials, it can be firmly bonded and not easy to fall off. Its sound absorption and anti-seismic properties also make it a commonly used material in building construction.
Practical use of polyurethane slab lifting
In 2005, a section of highway in Henan Province, China, was damaged by water seeping down cracks, destroying the foundation structure. After drilling and grouting operations, the gaps in the foundation were quickly filled and the accumulated water was drained. The entire maintenance process was quite fast. There is no road subsidence in this section of road.
Summary
Polyurethane slab lifting is an efficient and durable foundation repair technology. This technology drills holes in the settlement area and injects high-performance polyurethane foam materials, which expand and harden quickly, thereby reinforcing the soft foundation and lifting the settlement ground. Compared with traditional road construction methods, polyurethane lifting is simple to construct, fast, and has little impact on traffic. The material has strong pressure resistance, corrosion resistance and long-term stability, which can effectively reduce the rework rate.