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Liang J.F.,State Key Laboratory Breeding Base of Nuclear Resources and Environment | Liang J.F.,East China Institute of Technology | Yu D.,Guangxi University of Science and Technology | Yu B.,Monash University
Computers and Concrete | Year: 2016

An experimental investigation on the behaviour of concrete beams reinforced with various reinforcement, including ordinary steel bars, CFRP bars and CFRP prestressed concrete prisms(PCP). The main variable in the test program was the level of prestress and the cross section of PCP.The modes of failure and the crack width were observed. The results of load-deflection and load-crack width characteristics were discussed. The results showed that the CFRP prestressed concrete prisms as flexural reinforcement of concrete beams could limit deflection and crack width under service load and PCP can overcome the serviceability problems associated with the low elastic modulus/strength ratio of CFRP. Copyright © 2016 Techno-Press, Ltd.


Xiao S.J.,East China University of Technology | Huang H.Q.,State Key Laboratory Breeding Base of Nuclear Resources and Environment | Zhang L.,Nanchang University
Analytica Chimica Acta | Year: 2016

Molybdenum oxide (MoOx) is a well-studied transition-metal semiconductor material, and has a wider band gap than MoS2 which makes it become a promising versatile probe in a variety of fields, such as gas sensor, catalysis, energy storage ect. However, few MoOx nanomaterials possessing photoluminescence have been reported until now, not to mention the application as photoluminescent probes. Herein, a one-pot method is developed for facile synthesis of highly photoluminescent MoOx quantum dots (MoOx QDs) in which commercial molybdenum disulfide powder and hydrogen peroxide (H2O2) are involved as the precursor and oxidant, respectively. Compared with current synthesis methods, the proposed one has the advantages of rapid, one-pot, easily prepared, environment friendly as well as strong photoluminescence. The obtained MoOx QDs is further utilized as an efficient photoluminescent probe, and a new off-on sensor has been constructed for phosphate (Pi) determination in complicated lake water samples, attributed to the fact that the binding affinity of Eu3+ ions to the oxygen atoms from Pi is much higher than that from the surface of MoOx QDs. Under the optimal conditions, a good linear relationship was found between the enhanced photoluminescence intensity and Pi concentration in the range of 0.1-160.0 μM with the detection limit of 56 nM (3σ/k). The first application of the photoluminescent MoOx nanomaterials for ion photochemical sensing will open the gate of employing MoOx nanomaterials as versatile probes in a variety of fields, such as chemi-/bio-sensor, cell imaging, biomedical and so on. © 2015 Elsevier B.V.


Liang J.-F.,State Key Laboratory Breeding Base of Nuclear Resources and Environment | Liang J.-F.,East China Institute of Technology | Hu M.-H.,East China Institute of Technology | Deng Z.-P.,East China Institute of Technology
Applied Mechanics and Materials | Year: 2013

The flexural behavior of concrete beams reinforced with CFRP-PCPs composite rebars was studied. Experimental results showed that the performance of CFRP-PCPs composite rebars beams is superior to that of CFRP beams at service and ultimate and comparable and even better than RC beams at service condition. Flexural cracks of concrete beams reinforced with CFRP-PCPs composite rebars are hairline before prism cracking, and they widen after the prism Cracking. © (2013) Trans Tech Publications, Switzerland.


Liang J.-F.,State Key Laboratory Breeding Base of Nuclear Resources and Environment | Liang J.-F.,East China Institute of Technology | Yang Z.-P.,East China Institute of Technology | Yi P.-H.,East China Institute of Technology | Qiu Z.-M.,East China Institute of Technology
Applied Mechanics and Materials | Year: 2013

The nonlinear finite element analysis for the flexural behavior of the concrete beams reinforced with CFRP-PCPs Composite Rebars,which was a new structural form, has been studied in ANSYS. The effects of material nonlinearities of concrete, steel rebar, CFRP rebar were considered in the analytic model. Load-displacement curves were received through calculation in this paper. Compared the present result with the experimental results has proved that the model provided is correct and convenient for the analysis of the beams. © (2013) Trans Tech Publications, Switzerland.


Liang J.F.,State Key Laboratory Breeding Base of Nuclear Resources and Environment | Liang J.F.,East China Institute of Technology | Wang J.B.,East China Institute of Technology | Li J.P.,East China Institute of Technology
Applied Mechanics and Materials | Year: 2013

The flexural behavior of concrete beams reinforced with CFRP-PCPs composite rebars was studied. Experimental results showed that the deflection of beams reinforced with highly prestressed prisms is at service loads coMParable to deflection of steel reinforced beam. Flexural cracks of CFRP-PCPs composite rebars reinforced beams are hairline before prism cracking, and widened after the prism cracking. When the concrete beam was reinforced with the prestressed concrete prisms, the crack width decreased as the prestress in the prism increased. © (2013) Trans Tech Publications, Switzerland.

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