This study investigated the effects of reinforcing bar type and reinforcement ratio on the restrained shrinkage behaviors of ultra high performance fiber reinforced concrete (UHPFRC), including autogenous shrinkage stress, degree of restraint, and cracking potential. In addition, the influence of the type and embedment length of reinforcing bars on the bond behavior of UHPFRC was evaluated by performing pullout test. Three different reinforcing bars (deformed steel bar, round steel bar, and GFRP bar) were investigated in the restrained shrinkage and pullout tests. The GFRP bar exhibited the best performance in relation to the autogenous shrinkage stress, degree of restraint, and cracking potential because of its low stiffness. The highest bond strength was obtained for the deformed steel bar, and the bar yielding was observed when the bar embedment length of lb = 2db was used. The round steel bar exhibited the poorest behaviors for both of the restrained shrinkage and pullout.
|Number of pages||12|
|Journal||Cement and Concrete Composites|
|Publication status||Published - 2014 Apr|
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2012R1A2A1A05026406 ) and carried out as a partial research of the “Development of construction technology for concrete floated offshore infrastructures” in the Korea Institute of Construction Technology.
All Science Journal Classification (ASJC) codes
- Building and Construction
- Materials Science(all)