Experimental tests simulating the fracture of rebars in ASR-affected specimens

Abstract

By using specimens due to ASR which were simulated according to actual structures, authors carried out a long-term measurement of degradation in specimens at outdoor environment. Rebars according to the old specification before 1985 have been used in the specimens. Due to impact from ASR expansion, the progress of cracks was observed in bent part of rebars; the crack length being 31.5% of the rebar diameter was generated. Comparison for shapes of progressing cracks in stirrup with shapes of initial cracks due to bending process was conducted, from which, authors give evaluations for progressing characteristics of rebar cracks induced by ASR.