Introducing prestressed concrete bridges using fly ash!
Our company handles "PC components using blended materials." "Prestressed concrete bridges (PC bridges) using fly ash" aim to further enhance the durability of the originally high-strength prestressed concrete (PC) technology by achieving the fusion of FA + PC. "Pre-tensioned PC components made from blast furnace slag concrete" contribute to improved durability, such as resistance to chloride ion penetration, due to their high corrosion resistance from the ability to immobilize chloride ions. 【Lineup】 ■ Fly Ash ■ Blast Furnace Slag *For more details, please refer to the PDF materials or feel free to contact us.
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basic information
【Applicability to Pretension Structures】 <Pre-tensioned PC Members of Blast Furnace Slag Concrete> ■ Strain gauges were attached to the position of PC steel on the side of the concrete specimen, and the measured concrete strain was used to calculate the anchorage length. ■ From the measurement results of the anchorage length, it was confirmed that immediately after introduction it was 571mm (38φ) and 606mm (40φ) after 48 hours, which is below the assumed anchorage length of 988mm (65φ) in the road bridge guidelines. *For more details, please refer to the PDF document or feel free to contact us.
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Applications/Examples of results
【Applicable Bridge Examples】 ■ Otsuki Bridge (Bridge length 12.0 m): Pre-tensioned PC simple hollow slab bridge ■ Kibou Bridge (Bridge length 34.6 m): Post-tensioned PC simple T-beam bridge ■ Maintenance Pipeline Bridge (Bridge length 35.1 m) (Hokuriku Electric Power Co., Inc. Toyama New Port Thermal Power Plant) - Pre-tensioned precast PC slab (steel bridge slab section) *For more details, please refer to the PDF document or feel free to contact us.
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Company information
Our company was established in April 1952, focusing on the uniqueness of prestressed concrete (PC) introduced from France at that time. As a pioneer of PC technology in our country, we have contributed to national land development and the advancement of local communities for over 60 years, primarily through bridge construction. Moving forward, we are committed not only to new construction projects but also to enhancing measures for the longevity of bridges, strengthening maintenance and repair technologies, and developing new technologies and methods, all in efforts to create PC structures that meet societal needs.