In this study, an experiment program is presented to study the bonding mechanism
between corroded bolts and grout and in particular the influence on bonding behavior in terms of
different corrosion sections along anchor. With respect to four groups of manufactured bolt
specimens, the noncorroded and the corroded, respectively, on the front, middle and rear section
along anchor, a pullout test is conducted to reveal the relationship between load and loading-end
slip and to investigate the bond-stress distribution characterization along full anchor. Experimental
results show that corrosion product, acting as lubricating effect at the interface between bolts and
grout, can result in the degradation of bonding mechanical behavior. Meanwhile, corrosion on
different sections along anchor has a different effect on the anchorage capacity of bolts. Especially,
corrosion on the front section induces the greatest decrease of anchorage capacity of bolts. Thus, it
is concluded that the front section along anchor is the key region affecting the bonding mechanical
behavior between bolts and grout.
Investigation into the effect of water chemistry on corrosion product formation in areas of accelerated flow