Open AccessSTUDY ON BONDING PROPERTY OF POLYURETHANE CEMENT (PUC) TO STEEL BAR
Author(s) -
Kexin Zhang
Publication year - 2021
Publication title -
stavební obzor
Language(s) - English
Resource type - Journals
eISSN - 1805-2576
pISSN - 1210-4027
DOI - 10.14311/cej.2021.03.0050
Subject(s) - materials science , reinforcement , composite material , bond strength , bar (unit) , steel bar , bond , structural engineering , residual stress , layer (electronics) , adhesive , engineering , physics , finance , meteorology , economics
The pull-out test of the bar and PUC is carried out in this paper, the effects of protective layer thickness, reinforcement anchorage length, diameter and shape of reinforcement on bonding properties were studied. The results show that the bond strength between reinforcement and PUC material increases with the increase of the thickness of the protective layer, but decreases with the increase of the anchorage length and diameter of reinforcement. The bond strength of bare round steel is significantly lower than that of ribbed steel, and the maximum bond strength is about 47.4% of ribbed steel. By analyzing the bond slip curve obtained from the pull-out test, the stress process of bond anchorage between reinforcement bar and PUC material is mainly summarized into three stages: the rising stage, the falling stage and the residual stage. The characteristics of the curve, the stress process and the failure mode of specimen at each stage are analyzed.