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学者姓名：李悦
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Abstract ：
The effects of graphene oxide (GO) with different contents on hydration process of tricalcium silicate (C3S) were investigated in this article. The scanning electron microscopy, X-ray diffraction, thermogravimetric analysis, nitrogen desorption, nuclear magnetic resonance, Fourier transform infrared spectroscopy and Raman spectroscopy were used to analyze the micro-evolution of the GO/C3S hardened pastes, and the compressive strength of the GO/C3S was tested. The findings revealed that the addition of the GO increased the compressive strength of the GO/C3S because the GO can provide a large number of nucleation sites for hydration products, thereby accelerating the C3S hydration process. The GO also reduced the total pore volume of the C3S, leading to an increase in the proportion of gel pores and refinement in pore structure. Furthermore, the abundant oxygen-containing functional groups present on the GO surface can form hydrogen bonds with free water or interlayer water, thereby increasing the number of hydrogen bonds in the system.
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| GB/T 7714 | Li, Zhanguo , Du, Huan , Wang, Zigeng et al. Experimental Study of Graphene Oxide on Hydration Process of Tricalcium Silicate [J]. | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY , 2023 , 21 (9) : 719-734 . |
| MLA | Li, Zhanguo et al. "Experimental Study of Graphene Oxide on Hydration Process of Tricalcium Silicate" . | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY 21 . 9 (2023) : 719-734 . |
| APA | Li, Zhanguo , Du, Huan , Wang, Zigeng , Li, Yue . Experimental Study of Graphene Oxide on Hydration Process of Tricalcium Silicate . | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY , 2023 , 21 (9) , 719-734 . |
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Abstract ：
In this paper, the effect of microwave pretreatment on the electromagnetic properties of cement paste was investigated. Four different durations of microwave pretreatment were carried out after the standard conditioning of cement paste specimens for 3 days. Subsequently, the electromagnetic properties of the cement paste were tested, the electromagnetic losses of the specimens were calculated and the changes in the dielectric constants were analyzed. Finally, the mechanism by which microwave pretreatment affects the electromagnetic properties was analyzed based on the pore characteristics and hydration results. The results show that microwave pretreatment can improve the electromagnetic loss as well as the dielectric constant of cement paste specimens, but has no significant effect on the magnetic permeability. With the increase of microwave pretreatment time, the reflection loss, absorption loss, and total loss of electromagnetic waves increase significantly, and the multiple reflection loss decreases. The real part of the dielectric constant, imaginary part, and loss angle tangent all increased. There are two main reasons for the increase in electromagnetic loss and dielectric properties of the specimens after microwave pretreatment. One is the significant increase in the percentage of micropores less than 50 nm in the specimen, which increases the reflection loss and absorption loss of electromagnetic waves. On the other hand, microwave pretreatment significantly increased the degree of hydration of the specimen, making the specimen intermediate electrical properties of the larger proportion of the material phase (such as gel), which in turn increased the electromagnetic loss.
Keyword ：
Pore structure Pore structure Microwave pretreatment Microwave pretreatment Cement paste Cement paste Electromagnetic Electromagnetic Hydration degree Hydration degree
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| GB/T 7714 | Li, Yue , Liu, Yunze , Jin, Caiyun . Electromagnetic properties of cement paste after microwave pretreatment [J]. | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING , 2023 , 23 (3) . |
| MLA | Li, Yue et al. "Electromagnetic properties of cement paste after microwave pretreatment" . | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING 23 . 3 (2023) . |
| APA | Li, Yue , Liu, Yunze , Jin, Caiyun . Electromagnetic properties of cement paste after microwave pretreatment . | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING , 2023 , 23 (3) . |
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Abstract ：
The excessive extraction and utilization of river sand may lead to the destruction of river eco-systems. The use of manufactured sand as a substitute for river sand can effectively avoid the aforementioned issues. However, there are significant differences in the strength of mortar or concrete prepared using different types of sand. The influence law for lithological characteristics of three types of manufactured sand on mortar strength was investigated in depth. The core causes of strength variation influenced by different parent rocks were explained based on various macroscopic and microscopic test methods. The results of the flexural and compression tests showed that the different parent rock types would have a significant effect on the mortar strength, where molybdenum tailing sand had the largest increase in 28d strength of 17%. In addition, as decreasing the interfacial transition zone (ITZ) volume fraction and increasing the elastic and hardness moduli of ITZ, the mortar strength gradually increased. This study showed that using manufactured sand as a substitute for river sand reduced extraction and improved mortar strength while maintaining workability. Molybdenum tailings sand performed the best, which was sig-nificant for sustainable construction and environmental protection.
Keyword ：
Mechanical properties Mechanical properties Manufactured sand Manufactured sand Lithological characteristics Lithological characteristics Mortar Mortar
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| GB/T 7714 | Mu, Jinlei , Li, Yue , Lin, Hui et al. Research on the effect of lithological characteristics of manufactured sand on the strength of mortar [J]. | JOURNAL OF BUILDING ENGINEERING , 2023 , 77 . |
| MLA | Mu, Jinlei et al. "Research on the effect of lithological characteristics of manufactured sand on the strength of mortar" . | JOURNAL OF BUILDING ENGINEERING 77 (2023) . |
| APA | Mu, Jinlei , Li, Yue , Lin, Hui , Liu, Yunze , Luo, Xiao . Research on the effect of lithological characteristics of manufactured sand on the strength of mortar . | JOURNAL OF BUILDING ENGINEERING , 2023 , 77 . |
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Abstract ：
This paper performs the data-driven research on the autogenous shrinkage of Ultra-High Performance Concrete (UHPC) based on multiple machine learning algorithms. The autogenous shrinkage prediction model of UHPC with high prediction accuracy (R2 = 0.89) and strong generalization capability is established based on Gradient Boosting (GB) algorithm. The Graphic User Interface (GUI) of UHPC autogenous shrinkage prediction is designed, which assists in scientific research and engineering applications. Cement, silica fume, water, superabsorbent polymer, and expansive agent contents that are closely related to hydration process have prominent impacts on autogenous shrinkage of UHPC, while the fly ash, steel fibers, and sand contents show the slight impacts. The additions of superabsorbent polymer, expansive agent, steel fibers, sand, and superplasticizer effectively reduce the autogenous shrinkage of UHPC. Lower water to cement ratio causes larger autogenous shrinkage of UHPC.
Keyword ：
Feature analysis Feature analysis Machine learning Machine learning Prediction model Prediction model Autogenous shrinkage Autogenous shrinkage Ultra-high performance concrete Ultra-high performance concrete
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| GB/T 7714 | Li, Yaqiang , Shen, Jiale , Li, Yue et al. The data-driven research on the autogenous shrinkage of ultra-high performance concrete (UHPC) based on machine learning [J]. | JOURNAL OF BUILDING ENGINEERING , 2023 , 82 . |
| MLA | Li, Yaqiang et al. "The data-driven research on the autogenous shrinkage of ultra-high performance concrete (UHPC) based on machine learning" . | JOURNAL OF BUILDING ENGINEERING 82 (2023) . |
| APA | Li, Yaqiang , Shen, Jiale , Li, Yue , Wang, Kai , Lin, Hui . The data-driven research on the autogenous shrinkage of ultra-high performance concrete (UHPC) based on machine learning . | JOURNAL OF BUILDING ENGINEERING , 2023 , 82 . |
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Abstract ：
The search for construction materials that contribute to 5G signal transmission is important for the development of modern communication technologies. In this paper, the mechanical properties of white Portland cement (WPC) paste mixed with basalt fiber (BF) were analyzed and its electromagnetic properties were fully investigated. First, the fluidity and strength of WPC pastes with different BF contents were tested. Subsequently, the electromagnetic parameters of WPC paste samples were tested in the frequency band of 3.94 GHz-5.99 GHz, and their electromagnetic transmission properties were calculated. Finally, the mechanism of BF affecting the strength and electromagnetic transmission performance of WPC pastes was profiled using scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP). The results show that BF can reduce the fluidity of WPC pastes. With the increase of BF doping, the strength of WPC paste rises and then decreases, and reaches the maximum strength when the volume content of BF is 0.6%. With the increase of BF content, the electromagnetic wave reflection rate of WPC paste decreases, but the absorption and transmission rate increases. The bridging effect of BF, etc. improves the strength of the paste. In WPC pastes, with the increase of BF doping, the increase of electromagnetic wave absorption rate is smaller than the decrease of reflection rate, which leads to the improvement of electromagnetic transmission performance.
Keyword ：
White Portland cement White Portland cement Electromagnetic Electromagnetic Microstructure Microstructure Basalt fiber Basalt fiber Mechanical Mechanical
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| GB/T 7714 | Li, Yue , Liu, Yunze , Cheng, Yaping et al. Research on the mechanical and electromagnetic properties of white Portland cement paste containing basalt fiber [J]. | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING , 2023 , 23 (1) . |
| MLA | Li, Yue et al. "Research on the mechanical and electromagnetic properties of white Portland cement paste containing basalt fiber" . | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING 23 . 1 (2023) . |
| APA | Li, Yue , Liu, Yunze , Cheng, Yaping , Jin, Caiyun . Research on the mechanical and electromagnetic properties of white Portland cement paste containing basalt fiber . | ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING , 2023 , 23 (1) . |
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Abstract ：
The Euler method of computational fluid dynamics (CFD), the Bingham constitutive relationship and the measured concrete performance indexes were combined as the basis, the horizontal coil test and super high-rise building pumping test of concrete were simulated by software FLUENT. The data of maximum pump pressure, pressure loss of horizontal pipe, pressure loss per horizontal bend, pressure loss of vertical pipe and pressure loss per vertical bend from the test and numerical model were analyzed comparatively. The results showed that the simulation models can promisingly describe the flow behavior of concrete during pumping. In addition, it was found that the thickness of the lubricating layer forming during the concrete flow in the pump pipe was about 2 mm. Finally, the velocity vector analysis of concrete flow in the pump pipe was elucidated. The velocity gradient of the lubrication layer decreased with the increase of the distance from the pump pipe inlet. The velocity gradient of the concrete in the yield layer raised continuously. The flow velocity of concrete in the plug layer boosted with the thickness of the plug layer abated gradually. The concrete tended to be stable after flowing about 6 m in the horizontal pipe.
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| GB/T 7714 | Wang, Zigeng , Hao, Ji , Li, Yue et al. Simulation of Concrete Pumped in Horizontal Coil and Super High-Rise Building Based on CFD [J]. | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY , 2022 , 20 (4) : 328-341 . |
| MLA | Wang, Zigeng et al. "Simulation of Concrete Pumped in Horizontal Coil and Super High-Rise Building Based on CFD" . | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY 20 . 4 (2022) : 328-341 . |
| APA | Wang, Zigeng , Hao, Ji , Li, Yue , Tian, Xiaoxuan . Simulation of Concrete Pumped in Horizontal Coil and Super High-Rise Building Based on CFD . | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY , 2022 , 20 (4) , 328-341 . |
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Abstract ：
The effects of loading frequency, temperature and multi-walled carbon nanotubes (MWCNTs) on the energy dissipation property of cement paste were explored in the paper. Energy dissipation was characterized by loss factor (defined as loss modulus /storage modulus E & DPRIME;/E & PRIME;), and the roles of MWCNTs were analyzed emphatically by micro tests. The energy dissipation of cement paste originated from the sliding of C-S-H sheets at nanoscale and the friction of C-S-H globules at microscale. The loss factor decreased with the increase of loading frequency and temperature. After analyzing the micro tests results such as nuclear magnetic resonance and atomic force microscope, the mechanism of MWCNTs enhancing the energy dissipation property of cement paste was pro-posed: (1) at nanoscale, the mean chain length of C-S-H was increased by MWCNTs, leading to the sliding area of C-S-H sheets larger and increasing energy dissipation; (2) at microscale, the morphology of C-S-H gradually changed from globules to foil due to the presence of MWCNTs, which increased the friction area and the energy dissipation was enhanced; (3) MWCNTs were fibrous and bonded with C-S-H, and the friction between the their interfaces dissipated energy under alternating stress; (4) the small pore volume and pore roughness were increased by MWCNTs, which were contributed to increase the energy dissipation.
Keyword ：
Cement paste Cement paste Energy dissipation Energy dissipation Loss factor Loss factor MWCNTs MWCNTs
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| GB/T 7714 | Li, Hongwen , Li, Yue , Jin, Caiyun . The energy dissipation property of MWCNTs/cement paste composites [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2022 , 327 . |
| MLA | Li, Hongwen et al. "The energy dissipation property of MWCNTs/cement paste composites" . | CONSTRUCTION AND BUILDING MATERIALS 327 (2022) . |
| APA | Li, Hongwen , Li, Yue , Jin, Caiyun . The energy dissipation property of MWCNTs/cement paste composites . | CONSTRUCTION AND BUILDING MATERIALS , 2022 , 327 . |
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Abstract ：
The effects of coarse aggregate properties on concrete creep were explored in the paper by mesoscale modelling approach, in which concrete was divided into coarse aggregate and matrix. Firstly, the creep constitutive model parameters of matrix were determined based on macroscopic and indentation creep tests, and then the evolution of creep and the influences of aggregate properties were discussed based on 2D meso-scale simulation. The simulation results of macroscopic creep test showed that the creep was unevenly distributed in the concrete, and the creep of matrix in vertical direction (y direction) of aggregate was greater than that in horizontal direction (x direction). Through parametric studies, it was found that: (1) the shape and gradation of course aggregate had little effect on the macroscopic creep, but the creep distribution of the matrix was changed by the aggregate shape; (2) the higher the aggregate content, the smaller the creep of concrete; (3) the larger the elastic modulus, the smaller the creep, and the matrix creep in x direction of aggregate of decreased with the increase of elastic modulus ratio of aggregate to matrix. Based on the simulation results, stress redistribution and continuous retardation time spectrum were discussed. Stress redistribution at meso-scale mainly occurred in the matrix in the x direction of aggregate. Through the retardation time spectrum, the creep process including two short-term creeps and a long-term creep and their transition retardation time were determined. The aggregate content had no effect on the transition retardation time, while transition retardation time between two short-term creep was increased by the increase of elastic modulus of aggregate.
Keyword ：
Coarse aggregate properties Coarse aggregate properties Stress redistribution Stress redistribution Creep Creep Meso-scale modelling Meso-scale modelling Continuous retardation time spectrum Continuous retardation time spectrum
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| GB/T 7714 | Li, Hongwen , Li, Yue , Jin, Caiyun et al. Meso-scale modelling of the effect of coarse aggregate properties on the creep of concrete [J]. | JOURNAL OF BUILDING ENGINEERING , 2022 , 54 . |
| MLA | Li, Hongwen et al. "Meso-scale modelling of the effect of coarse aggregate properties on the creep of concrete" . | JOURNAL OF BUILDING ENGINEERING 54 (2022) . |
| APA | Li, Hongwen , Li, Yue , Jin, Caiyun , Liu, Jianglin , Liu, Yunze , Mu, Jinlei . Meso-scale modelling of the effect of coarse aggregate properties on the creep of concrete . | JOURNAL OF BUILDING ENGINEERING , 2022 , 54 . |
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Abstract ：
Early properties, reaction products, chemical bonds and structural units of alkali-activated brick powder geopolymers (BPG) are studied by measurement of compressive strength, and by techniques of XRD, TG, FTIR and Si-29 MAS NMR taking curing humidity as variable. The results show that the optimum compressive strength of BPG can reach 67.8 MPa with curing humidity of 60%, curing temperature of 70 C and curing age of 3d, while the high curing humidity (RH: 85% or 95%) is unfavorable to the strength development of BPG. Microscopic test results show that increasing curing humidity (for mixes cured up to < 60% RH) causes the increases in chemically bound water and Al-rich structural units (Q(4)(3Al) and Q(4)(4Al)) resulting in the excellent compressive strength. However, high curing humidity (RH: 95%) reduces the chemically bound water and hinders the formation of Al-rich structural units (Q(4)(3Al) and Q(4)(4Al)) resulting in the poor compressive strength. The reduction in physically bound water is favorable to the strength development of BPG when the chemically bound water is comparable. This research work suggests that the relatively optimum silicate modulus, alkali dosage and curing humidity for the preparation of BPG are 1.6, 6% and 60%, respectively.
Keyword ：
Brick powder Brick powder Curing humidity Curing humidity Early properties Early properties Alkali-activated geopolymers Alkali-activated geopolymers
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| GB/T 7714 | Shen, Jiale , Li, Yue , Lin, Hui et al. Early properties and microstructure evolution of alkali-activated brick powder geopolymers at varied curing humidity [J]. | JOURNAL OF BUILDING ENGINEERING , 2022 , 54 . |
| MLA | Shen, Jiale et al. "Early properties and microstructure evolution of alkali-activated brick powder geopolymers at varied curing humidity" . | JOURNAL OF BUILDING ENGINEERING 54 (2022) . |
| APA | Shen, Jiale , Li, Yue , Lin, Hui , Lv, Jianfeng , Feng, Shan , Ci, Junchang . Early properties and microstructure evolution of alkali-activated brick powder geopolymers at varied curing humidity . | JOURNAL OF BUILDING ENGINEERING , 2022 , 54 . |
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Abstract ：
Graphene oxide (GO) is an excellent nano reinforcing material. This paper presents the effect of GO addition on the hydration, microstructure and mechanical properties of magnesium phosphate cement (MPC). MPC with GO contents of 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10 % was prepared. The functional groups, mechanical properties, phase composition and reinforcement mechanism of the GO-MPC composites were tested and analysed. The results showed that water adhered to the GO, which led to a decrease in the fluidity of the MPC paste. With increasing GO content, the most probable pore size of MPC first decreased and then increased. By adding 0.04 % GO, the most probable aperture of MPC was reduced from 11.3 mu m to 0.9 mu m. The proper addition of GO could refine the pore size, densify the microstructure and improve the mechanical properties of MPC. An appropriate dosage of GO promoted the hydration of MPC, resulting in more hydration products, including potassium magnesium phosphate hexahydrate (MKP), better growth of MKP with higher crystallinity.
Keyword ：
Mechanical properties Mechanical properties Graphene oxide Graphene oxide Microstructure Microstructure Reinforcement Reinforcement Magnesium phosphate cement Magnesium phosphate cement
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| GB/T 7714 | Fan, Yufeng , Zhang, Guosheng , Li, Yue . Study on graphene oxide reinforced magnesium phosphate cement composites [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2022 , 359 . |
| MLA | Fan, Yufeng et al. "Study on graphene oxide reinforced magnesium phosphate cement composites" . | CONSTRUCTION AND BUILDING MATERIALS 359 (2022) . |
| APA | Fan, Yufeng , Zhang, Guosheng , Li, Yue . Study on graphene oxide reinforced magnesium phosphate cement composites . | CONSTRUCTION AND BUILDING MATERIALS , 2022 , 359 . |
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