| 摘要 |
PROBLEM TO BE SOLVED: To provide a construction method for roughening which, in the cases of improving earthquake-resistance of existing architectural structures, of supplementing insufficient strength of existing concrete members, or of newly installing reinforcement structures, can easily create a roughened irregular surface with a device not requiring a working space for installation, enables quantitative evaluation of the degree of unification, and does not require to chip the entire outer surface of the existing concrete member.SOLUTION: Prior to newly placing concrete on a designated jointing surface 11 of an existing concrete member (a concrete body 10), cylindrical or hemispherical recesses 13, or cylindrical recesses 13 with a partially-spherical tip, with a finite depth, which sink from the jointing surface 11 of the existing concrete member into the inside, are drilled by use of core drill or vacuum blast. These recesses 13 are formed plurally with spacing of a specific distance between each other. |
