The reinjector, adopting only the advantages of packers high-pressure injection scheme as well as of injectors' low-pressure injection feature, is being spot lighted as the next-generation injector system to boost the effects of injection for crack repair work.
The reinjector system is a proven technology which has been applied to construction of Seoul and Daegu Metropolitan Subways as well as of Incheon International Airport. its simple, practical design enables even non-expert users to easily handle the system and inject resin deep down into the crack.
Need for new technology
The tests on core injection status after crack repair works with existing injection systems show that the resin cannot reach the shear parts of the crack but remains just in the near-surface area. As the existing systems are not capable of injecting resin into small crack areas, a new technology of resin injection is needed to boost the durability of concrete structures.
The reinjector system has adopted only the advantages of high-pressure and low-pressure injection systems to implement a dual injection scheme: the primary high-pressure injection into major crack areas with forced power and the secondary low-pressure injection into small crack areas and shear parts of the crack aided by the capillary phenomenon of the injector, that is, a slow secondary injection with spring force during the pot life.
It is also possible to check the injection with the unaided eye. There are no losses of structures caused by high-pressure method.
andd because labor costs are cut back, construction costs can be kept down. Because any ordinary technicians with no experience can simply read the specifications and get the job done, it is widely used not just in civil engineering, construction sites, but also in repairing cracks in existing structures.
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