High-performance backing injection material with excellent safety and durability, constructed with 40 times expanded polyurethane!
- The set foam is a rapid foaming hardening type that cures in about 60 seconds. - The set foam reaches almost final strength in about 30 minutes, allowing the tunnel to be used immediately. - After curing, there is almost no volume change such as expansion or contraction. - Foaming starts about 12 seconds after mixing, resulting in minimal penetration into the ground behind the lining concrete and leaks from cracks, leading to less waste. - Due to its rapid foaming hardening type, there is little escape, allowing for complete filling of cavities. - It foams and hardens even underwater, and its independent bubbles provide excellent water-stopping properties. - The cured material has a low density, resulting in a smaller load acting on the lining concrete surface. - Analysis results and numerous achievements confirm that it does not cause water quality pollution and is safe.
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basic information
■ Construction quality can be ensured. We use site-foamed polyurethane produced by "Nisshinbo Chemical Inc.", a pioneer in polyurethane foam. ■ Loss during construction is smaller compared to other materials. The increase rate of the final actual injection amount from the quantity obtained by drilling the injection hole is 132%*. It is extremely economical compared to other materials, helping to reduce total construction costs. *Average performance from the Chemical Foam Association. ■ We have a lot of achievements. The set foam method has numerous achievements since the establishment of the Chemical Foam Association in 1977. The 40 times foamed polyurethane was first developed by Nisshinbo Chemical Inc. ■ Registered as a new technology by the Ministry of Land, Infrastructure, Transport and Tourism. NETIS CB-040060-V: After evaluation, it has been designated as one of the "design comparison technologies," which are useful new technologies.
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Applications/Examples of results
Ars Corporation Achievements up to 2021 80 cases of backfill injection work
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Company information
Since its establishment, our company has carried out numerous repair works on concrete structures such as tunnels, bridges, and waterways. Our goal is to regenerate, rather than destroy, public infrastructure and private facilities, and to enhance them for long-term maintenance.