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All Journal Civil Engineering Journal Bulletin of Chemical Reaction Engineering & Catalysis
Zhao, Wei
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Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture

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Mechanical Behavior of Hybrid Connectors for Rapid-Assembling Steel-Concrete Composite Beams Lu, Senqiang; Zhao, Wei; Han, Puge; Hang, Zhenyuan
Civil Engineering Journal Vol 5, No 10 (2019): October
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/cej-2019-03091395

Abstract

In order to achieve a kind of shear connector suitable for rapid-assembling steel-concrete composite beams, a new type of hybrid shear connectors is proposed, in which the concrete slab with prefabricated circular holes and the steel beam with welded studs are installed and positioned, and then epoxy mortar is filled in the prefabricated hole to fix the studs. To study the mechanical behavior of these hybrid connectors, test on 18 push-out specimens with different prefabricated circular holes are carried out. ABAQUS finite element software is adopted to verify the relationship between the numerical simulation and experiment, influences of the epoxy mortar strength and prefabricated circular holes diameter are studied. The results show that filling epoxy mortar in the prefabricated hole is beneficial to improve the stiffness and bearing capacity of the specimen; the change of epoxy mortar strength has a certain impact on the bearing capacity and stiffness of the hybrid connector; In the case of the same strength of the filling material, the size of the prefabricated circular holes diameter directly affects the stiffness and bearing capacity of the shear stud. The shear capacity equations proposed by considering the epoxy mortar strength and prefabricated holes diameter, and it has a wide applicability.
One-step Hydrothermal Synthesis of Fe3O4/GO Composites Combined with Persulfate for the Removal of Reactive Black in Aqueous Solution Sun, Zhaonan; Zhao, Wei; Wu, Jiayi; Shi, Ke; Zhang, Lin; Kou, Wei
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 3 Year 2025 (October 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20355

Abstract

An environmentally friendly magnetic Fe3O4/graphene oxide (Fe-GO) composite was synthesized via a hydrothermal method for persulfate (PDS) activation. The composite was systematically characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and Brunauer-Emmett-Teller (BET) analysis. Furthermore, the degradation performance of reactive black 5 (RB5) in the composite/PDS system was investigated under varying conditions, including composite dosage, PDS concentration, initial RB5 concentration, solution pH, and oscillation frequency. The experiments showed that the RB5 removal efficiency could reach 99.2% with good reproducibility under the conditions of 0.8 g/L of composites, 3 mol/L of PDS, 200 r/min of stirring speed, pH = 6, and 25℃ for 180 min. Quenching experiments showed that four active reactive substances, sulfate radicals SO4-·), hydroxyl radicals (·OH), oxygen radicals (O2·−) and single linear oxygen (1O2), existed in the composite/PDS system, of which 1O2 played a crucial role in the degradation of RB5. Cycling tests showed that the Fe-GO composites were stable and had good application prospects. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors Han, Puge Hang, Zhenyuan Kou, Wei Lu, Senqiang Shi, Ke Sun, Zhaonan Wu, Jiayi Zhang, Lin