Development of Repair Method for Poorly Grouting of PC Structures
By S. Nojima, N. Sugano, Y. Kamihigashi and K. Shito
Concrete Journal, Vol.41, No.11, Nov. 2003
- Synopsis
- Various non-destructive inspection methods are used for the purpose to evaluate PC Grout's filling condition. However, as the application thickness is limited, these inspection methods can not always specify a illing lack part. The authors evaluated PC Grout's filling condition and the healthy condition of PC steel by the visual observation using the drilling technology. And, it was reviewed how regrouting to the filling lack part of PC Grout was done. The water- jet method of construction was used for drilling. In the regrouting experiment, a vacuum pump was adopted for the grout injecting with the manner ordinarily done. As a result, it was confirmed that the evaluation of PC Grout's filling condition and the healthy condition of PC steel was possibly done without injuring PC steel by drilling with use of a water-jet method of construction. In addition, as for the injection method to have used a vacuum pump, it was also successfully confirmed that PC Grout with use of a vacuum pomp could be satisfactorily filled into the filling lack part.
- Keywords:
- grout for prestressed concrete, regrouting, drilling, water-jet, vacuum pump, inspection, repair
