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Author:

Zhang, Jianwei (Zhang, Jianwei.) | Tao, Xinyi (Tao, Xinyi.) | Li, Xiangyu (Li, Xiangyu.) | Zhang, Yunyi (Zhang, Yunyi.) | Liu, Yujun (Liu, Yujun.)

Indexed by:

EI Scopus SCIE

Abstract:

This study investigates the bond behavior between 600 MPa grade reinforcement and high-strength recycled aggregate concrete (RAC) by carrying out 22 beam tests. Test parameters include the recycled coarse aggregate (RCA) replacement ratio, reinforcement diameter, concrete cover thickness, stirrup ratio, concrete strength and the addition of steel fibers. The influences of different parameters on the failure modes, bond-slip curves and bond strength are discussed. The results indicate that the RCA replacement ratio has little effect on the failure mode and the bond-slip curve, while the bond strength decreases with its increase. Similar to normal aggregate concrete, the bond strength is positively correlated with f′c1/2. Increasing the concrete cover thickness or the stirrup ratio can significantly improve the bond strength and decrease the crack width. The addition of steel fibers can avoid specimen splitting, but this addition will disturb the reinforcement-concrete interface, which has little effect on the bond strength of 50 MPa grade RAC, however, the addition slightly increases the bond strength of 70 MPa grade RAC. The design bond strength of steel fiber concrete should not be lower than the design bond strength of plain concrete with the same compressive strength. The splitting failure of specimens is further classified, and the effective confinement Factor K for predicting the failure mode is presented. In view of different confinement conditions, bond-slip models between the 600 MPa grade reinforcement and high-strength recycled concrete are established. © 2021 Elsevier Ltd

Keyword:

Testing Compressive strength Concrete aggregates Capillary flow Failure modes Bond strength (materials) Recycling Concrete testing Steel fibers High performance concrete

Author Community:

  • [ 1 ] [Zhang, Jianwei]Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing, China
  • [ 2 ] [Tao, Xinyi]Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing, China
  • [ 3 ] [Li, Xiangyu]School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
  • [ 4 ] [Zhang, Yunyi]Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing, China
  • [ 5 ] [Liu, Yujun]Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing, China

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Source :

Construction and Building Materials

ISSN: 0950-0618

Year: 2022

Volume: 315

7 . 4

JCR@2022

7 . 4 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:66

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 31

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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