To provide theoretical data for the grout used in prefabricated structures and reinforcement reconstruction field. Pull-out tests were conducted on 27 specimens having grout with ribbed reinforced bars

and the failure mode and the variation of bond strength were studied. According to a typical bond-slip curve

the cracking

crushing and shearing process were analyzed. Based on the experimental data

the bond strength formula

the slip formula and the bond-slip formula were fitted. The empirical value of anchorage length of reinforcement in grout was presented. The result shows that the average bond strength increases with the increase of the cover thickness. While thickening the cover thickness

the increasing rate of bond strength is lower than that of concrete. In addition

increasing the bar diameter

the average bond strength decreases. Further-more

with the increase of the anchorage length

average bond strength decreases. The increase of anchorage length results in higher increment rate of the bond strength of grout compared to the self-compacting concrete. With the same compressive strength grade

the bond strength of grout is higher than that of ordinary concrete. In conclusion

the bond-slip behavior between ribbed steel bar and grout is different from that of concrete.