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Abstract:
Although recycled aggregate concrete (RAC) has been used in structural engineering, the application of brick-concrete recycled aggregate concrete (BCRC) in structural engineering remains limited. Bond-slip behavior is critical for the co-work between concrete and reinforcement bars. This study investigated the bond-slip behavior between BCRC and reinforcement bars through 45 pull-out tests. The variables studied include concrete type (natural aggregate concrete (NAC) and BCRC), recycled brick aggregate (RBA) replacement ratio (0 %, 25 %, and 50 %), concrete cylinder compressive strength (30 MPa and 40 MPa), concrete cover thickness (30 mm, 50 mm, and 68 mm), reinforcement diameter (8 mm, 14 mm, and 20 mm), bond length (5 d, 10 d, 15 d, and 20 d), stirrup ratio (0.5 %, 0.7 %, and 1.0 %), and reinforcement shape (deformed and plain). The results show that compared with NAC, the normalized ultimate bond strength of BCRC with RBA replacement ratios of 0 %, 25 %, and 50 % increased by 7.5 %, 3.6 %, and 19.2 %, respectively. As the cylinder compressive strength of BCRC increased from 30 MPa to 40 MPa, the ultimate bond strength increased by 24.5 %, and the ultimate slip decreased by 20.0 %. Based on the test data, a bond stress-slip model for BCRC was proposed, demonstrating high accuracy. The models proposed in this paper can provide a reference for the engineering structural design of BCRC. © 2024 Elsevier Ltd
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Construction and Building Materials
ISSN: 0950-0618
Year: 2024
Volume: 436
7 . 4 0 0
JCR@2022
Cited Count:
SCOPUS Cited Count: 2
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2
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