Concrete Column Urethane Reinforcement Method "Gankyō Column"
Inject rigid polyurethane resin into existing concrete columns for reinforcement with a short construction period. Prevent the collapse of concrete columns during natural disasters.
Natural disasters such as earthquakes and typhoons have caused utility poles to fall, obstructing emergency vehicles and delaying recovery efforts, which has become a social issue. In recent years, accidents have also occurred where strong winds have caused utility poles to fall, leading to traffic disruptions and damage to buildings and homes. Upcon has developed a concrete pole reinforcement method called "Sturdy Pole," which increases the destructive load capacity of existing concrete poles to prevent collapse. The "Sturdy Pole" method involves injecting high-strength foam polyurethane resin, specifically developed for reinforcement, into the hollow section of existing concrete poles, achieving a short construction period and ease of installation. This method increases the strength of existing concrete poles without the need for replacement. Since there is no need for removal, it helps reduce construction time and costs while also contributing to the resilience of the national infrastructure. 【Features】 1. Short construction period Special polyurethane resin is injected, quickly filling the cavity with foaming and expansion pressure. 2. Easy installation Only drilling and injection into the existing concrete poles are required, allowing for installation by a small team. 3. Suitable for narrow spaces Reinforcement in narrow areas or along major roads where replacing existing concrete poles is difficult can be easily accomplished. ■ More details can also be viewed in the PDF data.
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■Bending Test Results 【Existing Concrete Column 3.5kN】 Failure Load: 8.2 kN Deflection: 1,500mm Failure Ratio: 2.34 【Reinforced Column】 Failure Load: 9.8 kN Deflection: 2,118mm Failure Ratio: 2.8 ■About Rigid Foam Polyurethane Resin Rigid foam polyurethane resin undergoes a chemical reaction by mixing two liquids, polyol and isocyanate, which quickly transforms from a liquid to a creamy, gel-like state, expanding and hardening. It exhibits a strength of approximately 1200 kPa in about 2 hours. Density: 185kg/m³ Compressive Strength: 1400kPa Bending Strength: 900kPa ● The compressive strength reaches approximately 1.2MPa in about 2 hours. It is environmentally safe, non-Freon, and has no impact on the soil.
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We carry out construction to correct the sinking, tilting, steps, and gaps in concrete floors caused by uneven ground subsidence in buildings such as factories, warehouses, stores, and general residences, using our unique "Upcon Method" with completely non-fluorinated urethane resin and small machinery. Additionally, we are engaged in public works that utilize technologies developed through various research and development projects to restore the functionality of aging social infrastructure such as roads, airports, ports, and agricultural waterways. ■ Features of the Upcon Method 1. Short construction period: The construction time is 1/10 of conventional methods. 2. No interruption of operations: No need to move machinery or cargo. 3. Comprehensive high technical capability: 100% in-house employees. 4. Compact construction system: Quick restoration to the current state is possible. 5. Reduced risk of re-subsidence: Lower risk of re-subsidence compared to conventional methods. Our in-house staff provides total support from on-site surveys across the country to repair planning and construction, taking full responsibility. Our specialized and experienced in-house staff will propose the optimal repair plan tailored to your site. Upcon Co., Ltd. was newly listed on the Nagoya Stock Exchange Next Market on December 26, 2022.