Civil engineering/constructionCivil engineering/construction
Carbon fiber is drawing the attention as a new building material replacing iron which is lightweight, strong, and does not rust.
Carbon fiber is lightweight and strong, permits such execution method as impregnating resin in carbon fiber textile and then curing it onsite, eliminates the need for heavy machinery to attach metal panels, and these advantages make carbon fiber the best material also for restore/reinforcement applications.
In particular, restore and reinforcements using carbon fiber were carried out across the nation as the Great Kobe Earthquake highlighted the importance of antiseismic reinforcement. In addition to having high specific strength and high modulus of elasticity, carbon fiber does not rust and deteriorates less than metals in a corrosive environment near the beach, etc.
Carbon fiber restore/reinforcements are largely divided into methods using textile and methods using cured and blanked sheet (laminate) gained by pultrusion molding. Both types of methods involve attaching textile or laminate on concrete surface, etc., using epoxy resin and curing it at room temperature.
Textile conforming to any shape is suitable for smoke stacks, columns and other cylindrical or flexing members/areas, but attaching laminate is better for floor boards and other flat plate because it eliminates the need for stacking multiple layers and saves time.
These methods are being developed and promoted by the SR-CF Method Study Group and Laminate Method Study Group, etc., and their application is making rapid progress through these study groups. Currently Japan, the earthquake capital of the world, is leading the world in carbon fiber restore/reinforcements, but these applications are also finding their way into Europe and America, Asia and other parts of the world.