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| 1 | Experimental and mesoscopic investigation on the dynamic properties of coral aggregate concrete in compression显示文摘To investigate the dynamic responses and comprehending the damage mechanism of coral aggregate concrete(CAC) in compression, both the experimental and numerical investigations were implemented in the present work. Firstly, the dynamic mechanical properties of CAC at different strain rates were tested through the Split-Hopkinson pressure bar(SHPB) tests.Moreover, the effects of concrete strength grade and strain rate on CAC were discussed and analyzed. Subsequently, we developed the three-dimensional(3D) random mesoscale model considering the randomness of aggregate shape, size and distribution at meso-level, which was validated and employed in the numerical simulation of CAC in compression. The results indicate that the splitting failure passing through the coral aggregate is CAC’S primary failure mode. It has been found that the failure pattern, deformation process, and dynamic increasing factor of CAC are associated with both the strain rate and concrete strength grade. Furthermore, by comparing the experimental and mesoscopic results, it has been proven to be reliable to employ the developed 3D mesoscale modelling method to simulate CAC’s dynamic performances, which has enormous potential in future research of CAC under intense dynamic loadings. | WU Zhang Yu ZHANG JinHua YU HongFa FANG Qin CHEN Li YUE ChengJun | 2021 | Science China(Technological Sciences)2021，64，6： | 5 |
| 2 | A multi-layered Ti3C2/Li2S composite as cathode material for advanced lithium-sulfur batteries显示文摘Lithium-sulfur(Li-S)batteries with lithium sulfide(Li2S)as cathode have attracted great attention recently,because of high specific capacity(1166 mA h g^-1)of Li2S and potential safety of using Li metal-free anode.Li2S cathode has lower volume expansion and higher thermal stability than the traditional sulfur cathode.However,the problems of'shuttle effect'and poor electrical conductivity of the cathode material still need to be overcome.In this work,multi-layered Ti3C2/Li2S(ML-Ti3C2/Li2S)composite has been prepared and applied as a cathode in advanced Li-S batteries.The unique multi-layer sheet structure of Ti3 C2 provides space for the storage of Li2S,and its good conductivity greatly enhances the usage ratio of Li2 S and improves the conductivity of the whole Li2S cathode.Compared with commonly used graphene,ML-Ti3C2 can trap polysulfides effectively by chemical adsorption and also activate the reaction of Li2S to polysulfides by forming Ti-S bond.As a result,during the cycling of the batteries with ML-Ti3C2/Li2S cathodes,the activation voltage barrier of the first cycle has decreased to 2.8 V,and the'shuttle effect'has been suppressed effectively.The cycling and rate performances of the ML-Ti3C2/Li2S cathodes have been significantly improved compared to that of graphene/Li2 S cathodes.They maintain a capacity of 450 mAh g^-1 at 0.2 C after 100 cycles,and deliver attractive rate performances of 750,630,540,470 and 360 mAh g^-1 at 0.1 C,0.2 C,0.5 C,1 C,and 2 C,respectively. | Xin Liang Jufeng Yun Kun Xu Hongfa Xiang Yong Wang Yi Sun Yan Yu | 2019 | Journal of Energy Chemistry2019，28，12： | 4 |
| 3 | Effect of Carbonation and Drying-Wetting Cycles on Chloride Diffusion Behavior of Coral Aggregate Seawater Concrete显示文摘Based on seawater immersion,drying-wetting cycles,carbonation and drying-wetting cycles for coral aggregate sea-water concrete(CASC)with different strength grades,the effect of carbonation and drying-wetting cycles on chloride diffusion be-havior of CASC is studied.The results show that the free surface chloride concentration(Cs),free chloride diffusion coefficient(Df)and time-dependent index(m)of CASC in the drying-wetting cycles is obviously higher than that in seawater immersion.The Df and m of CASC of carbonation and drying-wetting cycles is higher than that in the drying-wetting cycles.Carbonation increases the Df and m of CASC,which is against CASC to resist chloride corrosion.The corrosion possibility of CASC structures in different ex-posed areas is as follows:splash zone(carbonation and drying-wetting cycles)>tidal zone(drying-wetting cycles)>underwater zone(seawater immersion).Besides,the chloride diffusion rate of C65-CASC is 17.8%-63.4%higher than that of C65-ordinary aggre-gate concrete(OAC)in seawater immersion(underwater zone).Therefore,anti-corrosion measures should be adopted to improve the service life of CASC structure in the oceanic environment. | DA Bo LI Yipeng YU Hongfa MA Haiyan CHEN Haoyu DOU Xuemei WU Zhangyu | 2022 | Journal of Ocean University of China2022，21，1： | 2 |
| 4 | Extraction of aluminum by pressure acid-leaching method from coal fly ash显示文摘 | WU Chengyou YU Hongfa ZHANG Huifang | 2012 | Transactions of Nonferrous Metals Society of China2012，22，： | 1 |
| 5 | The biodiversity of macrobenthos from Jiaozhou Bay显示文摘 | Haiyan Yu Xinzheng Li Baoquan Li Jinbao Wang Hongfa Wang | 2006 | Acta Ecologica Sinica2006，，2： | 1 |
| 6 | Compressive strength of fly ash magnesium oxychloride cement contain- ing granite wastes显示文摘 | LI Ying YU Hongfa zHENG Lina | 2013 | Construct Build Mater2013，38，： | 1 |
| 7 | Structural Characterization of a New Magnesium Oxysulfate Hydrate Cement Phase and Its Surface Reactions with Atmospheric Carbon Dioxide显示文摘 | Tom?e Run?evski Chengyou Wu Hongfa Yu Bo Yang Robert E. Dinnebier | 2013 | J. Am. Ceram. Soc2013，，11： | 1 |
| 8 | Mesoscopic Modeling Approach and Application for Steel Fiber Reinforced Concrete under Dynamic Loading:A Review显示文摘Steel fiber reinforced concrete(SFRC)has drawn extensive attention in recent years for its superior mechanical response to dynamic and impact loadings.Based on the existing test results,the highstrength steel fibers embedded in a concrete matrix usually play a strong bridging effect to enhance the bonding force between fiber and the matrix,and directly contribute to the improvement of the post-cracking behavior and residual strength of SFRC.To gain a better understanding of the action behavior of steel fibers in matrix and further capture the failure mechanism of SFRC under dynamic loads,the mesoscopic modeling approach that assumes SFRC to be composed of different mesoscale phases(i.e.,steel fibers,coarse aggregates,mortar matrix,and interfacial transition zone(ITZ))has been widely employed to simulate the dynamic responses of SFRC material and structural members.This paper presents a comprehensive review of the state-of-the-art mesoscopic models and simulations for SFRC under dynamic loading.Generation approaches for the SFRC mesoscale model in the simulation works,including steel fiber,coarse aggregate,and the ITZ between them,are reviewed and compared systematically.The material models for different phases and the interaction relationship between fiber and concrete matrix are summarized comprehensively.Additionally,some example applications for SFRC under dynamic loads(i.e.,compression,tension,and contact blast)simulated using the general mesoscale models are given.Finally,some critical analysis on the current shortcomings of the mesoscale modeling of SFRC is highlighted,which is of great significance for the future investigation and development of SFRC. | Jinhua Zhang Zhangyu Wu Hongfa Yu Haiyan Ma Bo Da | 2022 | Engineering2022，，9： | 1 |
| 9 | Compressive strength of flyash magnesium oxychloride cement containing granite wastes显示文摘 | LI Ying YU Hongfa ZHENG Lina | 2013 | Construct Build Mater2013，38，： | 1 |
| 10 | Apparent activation energy of concrete in early age determined by adiabatic test显示文摘 | Jiachun Wang Peiyu Yan Hongfa Yu | 2007 | Journal of Wuhan University of Technology - Mater Sci Ed2007，，3： | 1 |
| 11 | Extraction of aluminum by pressure acid-leaching method from coal fly ash 显示文摘 | Wu Chengyou Yu Hongfa Zhang Huifang | 2012 | Transactions of Nonferrous Metals Society of China2012，，22： | 1 |
| 12 | Free-standing vanadium pentoxide nanoribbon film as a high-performance cathode for rechargeable sodium batteries显示文摘Vanadium pentoxide(V_2O_5·nH_2O) nanoribbons are synthesized via a hydrothermal process. These ribbons are 20 nm thick, 200 nm to 1 μm wide and several tens of micrometers long. Free-standing binder-free films are prepared by using these nanoribbons with multi-walled carbon nanotubes(MWCNTs) and used as the cathode for rechargeable sodium batteries. The large interlayer space between the V_2O_5 bilayers can enhance the kinetics of sodium ion intercalation/deintercalation. In addition, the intertwining network of the V_2O_5·0.34 H_2O film provides efficient electron conduction pathways and shortens diffusion distances of sodium ion. The electrochemical tests prove that the freestanding V_2O_5 · 0.34 H_2O film cathode delivers high reversible specific capacities(190 mAh/g) and good cycling stabilities(170 mAh/g after 150 cycles) in the voltage range between 1.5 V and 3.5 V. | Yi Sun Xin Liang Hongfa Xiang Yan YU | 2017 | Chinese Chemical Letters2017，28，12： | 1 |
| 13 | Influence of steel corrosion on axial and eccentric compression behavior of coral aggregate concrete column显示文摘To study the behavior of coral aggregate concrete(CAC)column under axial and eccentric compression,the compression behavior of CAC column with different types of steel and initial eccentricity(ei)were tested,and the deformation behavior and ultimate bearing capacity(Nu)were studied.The results showed that as the ei increases,the Nu of CAC column decreases nonlinearly.Besides,the steel corrosion in CAC column is severe,which reduces the steel section and steel strength,and decreases the Nu of CAC column.The durability of CAC structures can be improved by using new organic coated steel.Considering the influence of steel corrosion and interfacial bond deterioration,the calculation models of Nu under axial and eccentric compression were presented. | Bo DA Yan CHEN Hongfa YU Haiyan MA Bo YU Da CHEN Xiao CHEN Zhangyu WU Jianbo GUO | 2021 | Frontiers of Structural and Civil Engineering2021，15，6： | 1 |
| 14 | Three-Dimensional Mesoscopic Investigation on the Impact of Specimen Geometry and Bearing Strip Size on the Splitting-Tensile Properties of Coral Aggregate Concrete显示文摘The use of coral aggregate concrete(CAC)as a novel construction material has attracted significant attention for the construction of reef engineering structures.To investigate the static splitting-tensile behaviors of CAC under the influence of two factors,namely specimen geometry and bearing strip size,a three-dimensional(3D)mesoscale modeling approach with consideration for aggregate randomness in shape and distribution was adopted in this study.We established 12 different specimen models with two specimen shapes(i.e.,a cube with an edge length of 150 mm and a cylinder with dimensions ofφ150 mm×300 mm)and six strip widths(i.e.,6,9,12,15,18,and 20 mm)for calculation.The effects of specimen geometry and strip width on the splitting-tensile properties of CAC,such as failure processes,final failure patterns,and splitting-tensile strength(fst),are analyzed and discussed systematically.The results indicate the high reliability of the developed mesoscale modeling approach and reveal the optimal computational parameters for simulating and predicting the splitting-tensile properties of CAC.The fstvalues of CAC are associated with both the specimen geometry and width of the bearing strip.The fstvalues of the cube model are slightly higher than those of the cylinder model for the same bearing strip size,representing geometry effects that can be explained by differences in fracture area.Additionally,the fstvalue of CAC gradually increases with the relative width of the bearing strip ranging from 0.04 to 0.13.Based on the elastic solution theory,the variation area of CAC fstvalues with the relative width of the bearing strip was determined preliminarily,which has great significance for studying the tensile performance of CAC. | Zhangyu Wu Jinhua Zhang Hongfa Yu Qin Fang Haiyan Ma Li Chen | 2022 | Engineering2022，，10： | 1 |
| 15 | Adifferentiated shared Protection algorithm supporting traffic groo- ming in WDM Mesh Network显示文摘 | Bing Xiang Hongfa Yu Sheng Wang | 2004 | ICCAS2004，1，： | 1 |
| 16 | The Influences Brought by Coupling Effect of Bending Loads, Chemical Corrosion and Carbonation to the Capability of Concrete in Resisting to Freeze- Thaw Cycles 显示文摘 | Yu Hongfa Mu Ru Sun Wei and Miu Changwen | 2005 | Journal of Silicate2005，33，4： | 1 |
| 17 | Identification of a novel host protein interacting with Toxoplasma gondii toxofilin via a yeast two-hybrid system显示文摘 | Yanshen Li Zhenhua Yu Yong Cui Hui Sun Jin Li Kun Yin Guihua Zhao Hongfa Wang Bingcheng Huang Qingkuan Wei Gongzhen Liu Jingxuan Kou | 2018 | Acta Biochimica et Biophysica Sinica2018，50，4： | 0 |
| 18 | Dynamic Impact Compressive Behavior Investigation of Sisal Fiber-reinforced Coral Seawater Concrete显示文摘Split Hopkinson pressure bar(SHPB)was used to investigate the dynamic compressive properties of sisal fiber reinforced coral aggregate concrete(SFCAC).The results showed that,with the increase of strain rate,the dynamic compressive strength,peak strain and toughness index of SFCAC are all greater than its static properties,indicating that SFCAC is a kind of rate-sensitive material.When the sisal fiber was blended,the failure mode showed obvious ductility.At high strain rates,the SFCAC without sisal fiber specimen was comminuted,and the SFCAC showed a'cracked without breaking'state.The results indicated that the sisal fiber played a significant role in reinforcing and strengthening the properties of concrete.The finite element software LS-DYNA was used to simulate two working conditions with strain rates of 78 and 101 s-1.The stressstrain curves and failure patterns obtained were in good agreement with the experimental results. | MA Haiyan TAN Yongshan YU Hongfa YUE Chengjun ZHANG Yan | 2023 | Journal of Wuhan University of Technology(Materials Science)2023，38，5： | 0 |
| 19 | Compressive Strength of Basic Magnesium Sulfate Cement Coral Aggregate Concrete(MCAC)on Non-Destructive Testing显示文摘Basic magnesium sulfate cement coral aggregate concrete(MCAC)is a new type of concrete consisting of basic magnesium sulfate cement,coarse coral aggregate,coral reef sand and seawater.The rebound hammer(RH),the ultrasonic pulse velocity(UPV)and the compressive strength(fcu)tests of 14 sets of cube specimens of the MCAC after 28 d of aging were conducted.The impact of the content and length of sisal fiber on the relationship between the fcu-RH and the fcu-UPV was determined.A mathematical model was established to predict the strength of the MCAC using the UPV,RH,and comprehensive UPV/RH methods and to obtain the curves of test strength.The applicability of the test strength curves of ordinary portland concrete(OPC),light-weight aggregate concrete(LAC),and coral aggregate concrete(CAC)to MCAC was assessed.The results showed that the test strength curves of OPC,LAC and CAC were inappropriate to determine the strength of MCAC using non-destructive method.The relative standard error of the curves of test strength of the RH method and the comprehensive method met the specifications,whereas that of the UPV method did not. | GUO Jianbo YU Hongfa MA Haiyan CHANG Yun MEI Qiquan ZHANG Yan | 2023 | Journal of Wuhan University of Technology(Materials Science)2023，38，5： | 0 |
| 20 | Service Life Design for Concrete Engineering in Marine Environments of Northern China Based on a Modified Theoretical Model of Chloride Diffusion and Large Datasets of Ocean Parameters显示文摘In this study,through experimental research and an investigation on large datasets of the durability parameters in ocean engineering,the values,ranges,and types of distribution of the durability parameters employed for the durability design in ocean engineering in northern China were confirmed.Based on a modified theoretical model of chloride diffusion and the reliability theory,the service lives of concrete structures exposed to the splash,tidal,and underwater zones were calculated.Mixed concrete proportions meeting the requirement of a service life of 100 or 120 years were designed,and a cover thickness requirement was proposed.In addition,the effects of the different time-varying relationships of the boundary condition(Cs)and diffusion coefficient(Df)on the service life were compared;the results showed that the time-varying relationships used in this study(i.e.,Cscontinuously increased and then remained stable,and Dfcontinuously decreased and then remained stable)were beneficial for the durability design of concrete structures in marine environment. | Taotao Feng Hongfa Yu Yongshan Tan Haiyan Ma Mei Xu Chengjun Yue | 2022 | Engineering2022，，10： | 0 |
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