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Computers and Concrete Volume 27, Number 6, June 2021 , pages 563-574 DOI: https://doi.org/10.12989/cac.2021.27.6.563 |
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Pull-out strength between Nano-SiO2 contained light-weight self-consolidating concrete and GFRP and steel bars |
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Hamed Arjomandi and Ali Foroghi Asl
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| Abstract | ||
| In this study, the effect of SiO2 nanoparticles on the bonding behavior of steel and glass fiber reinforced polymer (GFRP) bar embedded in contained Light-weight Self-Consolidating Concrete (LWSCC) has been studied experimentally and numerically. The measurement of the mechanical properties of LWSCC modified with SiO2 nanoparticles, including compressive and tensile strength, elastic modulus and density were also carried out. Studies are conducted on 7, and 28-day aged LWSCC samples containing 0, 2 and 5% SiO2 nanoparticles with 12 mm and 16 mm diameter GFRP and steel bars. The results show that LWSCC modified with SiO2 nanoparticles increases the bonding strength between concrete and bar. In LWSCC with 2 and 5 wt.% SiO2, the maximum pull-out force of 16 mm diameter steel bar is increased by 48.5% and 54.7%, respectively, compared to the LWSCC without nanoparticle addition. Also, bonding improvement between GFRP bars with a diameter of 16mm and LWSCC having 2 and 5 wt.% SiO2 is 32.3% and 40%, respectively. | ||
| Key Words | ||
| light-weight self-consolidating concrete; SiO2 Nanoparticles; pull-out behavior; GFRP bar | ||
| Address | ||
| Hamed Arjomandi and Ali Foroghi Asl: Department of Civil Engineering, University of Tabriz, Tabriz, Iran | ||