Effect of Coarse Aggregate Concentration on the Mechanical Properties and Bond-Slip Behavior Between the Low Strength Concrete and Plain Rebar

Sidar Nihat Bicakci*, Osama Abo Kaf, Hasan Nuri Turkmenoglu, Servan Baran, Hakan Nuri Atahan

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Özet

Reinforced concrete structures still exist with low-strength class in which plain reinforcement (rebar) is used. The coarse aggregate concentration (CAC) in such concrete may also vary significantly. Considering such structures and their reinforced concrete bearing systems, in this study, eight different mixtures with 0.9 and 1.2 water/cement ratios (W/Cm) and 4 different CACs (60%-40%-20%-0%) were produced. Total aggregate volume fraction was kept constant in all mixtures. Modulus of elasticity (MOE), compressive, and splitting tensile strength (STS) tests were performed at 28 days. Bond strength and bond-slip behavior were investigated by pull-out tests. Results showed that the compressive strength ranged from 7.9 to 23.4 MPa. While the MOE improved by about 34%, the compressive strength decreased by around 30% when the CAC was increased from 0% to 60% in the concrete with 1.2 W/Cm. With an increase in CAC, compressive strength and MOE increased in the mixtures with W/Cm of 0.9. The presence of coarse aggregate increased STS in the concrete with W/Cm of 1.2, while the mixture with CAC of 60% having W/Cm of 0.9 had the lowest STS. In terms of the bond strength and residual bond stress between the concrete and plain rebar, the mixtures without coarse aggregate have performed worst for both W/Cm. Additionally, when the CAC was increased from 0% to 40%, in the mixtures with W/Cm of 0.9, almost 60% improvement in bond strength was seen. Moreover, bond-slip behaviors of the mixtures were evaluated.

Orijinal dilİngilizce
Ana bilgisayar yayını başlığıBuilding for the Future
Ana bilgisayar yayını alt yazısıDurable, Sustainable, Resilient - Proceedings of the Symposium 2023 - Volume 1
EditörlerAlper Ilki, Derya Çavunt, Yavuz Selim Çavunt
YayınlayanSpringer Science and Business Media Deutschland GmbH
Sayfalar1020-1029
Sayfa sayısı10
ISBN (Basılı)9783031325182
DOI'lar
Yayın durumuYayınlandı - 2023
EtkinlikInternational Symposium of the International Federation for Structural Concrete, fib Symposium 2023 - Istanbul, Turkey
Süre: 5 Haz 20237 Haz 2023

Yayın serisi

AdıLecture Notes in Civil Engineering
Hacim349 LNCE
ISSN (Basılı)2366-2557
ISSN (Elektronik)2366-2565

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???event.eventtypes.event.conference???International Symposium of the International Federation for Structural Concrete, fib Symposium 2023
Ülke/BölgeTurkey
ŞehirIstanbul
Periyot5/06/237/06/23

Bibliyografik not

Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Finansman

Acknowledgments. The authors gratefully acknowledge “ITU Scientific Research Projects Coordination Unit (BAP)” for their financial support (Project number: MYL-2022–43739).

FinansörlerFinansör numarası
ITU Scientific Research Projects Coordination UnitMYL-2022–43739

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