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学者姓名：杨政险
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Abstract ：
The production of concrete involves substantial consumption of non-renewable resources, while the high porosity of pervious concrete makes it prone to colonization by microorganisms, causing clog and strength loss. This study develops photocatalytic alkali-activated steel slag pervious concrete (PASSPC) utilizing Cu-ZnO/gC3N4 hybrid hetero-microspheres as the photocatalyst, steel slag and ground granulated blast furnace slag as the blended binder, and coarse steel slag as the aggregate. The photocatalytic antibacterial properties, volume stability, and strength of PASSPC with different contents of Cu-ZnO/g-C3N4 were investigated. The antibacterial mechanism of PASSPC was investigated using electron paramagnetic resonance and the results revealed that with 1.2 wt% Cu-ZnO/g-C3N4 (by weight to binder) addition, PASSPC reached a 99.68 % antibacterial ratio under visible light irradiation. Cu-ZnO/g-C3N4 exhibits a dual effect on PASSPC by delaying binder hardening while promoting hydration in later stages, resulting in decreased 3 d compressive strength, followed by increased 28 d compressive strength compared to the blank samples. In addition, Cu-ZnO/g-C3N4 improves the microstructure and interfacial transition zone of PASSPC, effectively mitigating the adverse effects of steel slag instability through a dual buffering mechanism provided by macro- and micro-pores.
Keyword ：
Antibacterial properties Antibacterial properties Cu-ZnO/g-C3N4 hybrid hetero-microspheres Cu-ZnO/g-C3N4 hybrid hetero-microspheres Pervious concrete Pervious concrete Steel slag Steel slag Visible light irradiation Visible light irradiation
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| GB/T 7714 | Li, Kang , Yang, Zhengxian , Lu, Lin et al. The antibacterial and engineering properties of steel slag based pervious concrete incorporated with Cu-ZnO/g-C3N4 hybrid hetero-microspheres [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 460 . |
| MLA | Li, Kang et al. "The antibacterial and engineering properties of steel slag based pervious concrete incorporated with Cu-ZnO/g-C3N4 hybrid hetero-microspheres" . | CONSTRUCTION AND BUILDING MATERIALS 460 (2025) . |
| APA | Li, Kang , Yang, Zhengxian , Lu, Lin , Li, Yiming , Wang, Wencheng , Duan, Jizhou et al. The antibacterial and engineering properties of steel slag based pervious concrete incorporated with Cu-ZnO/g-C3N4 hybrid hetero-microspheres . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 460 . |
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To examine the effect of flocculation treatment on slurry clogging during vacuum preloading, this study conducted vacuum preloading model tests using lime, anionic polyacrylamide (APAM), and the dual use of polyaluminum chloride (PAC) and APAM in conjunction with particle image velocimetry (PIV) analysis. The results demonstrated that flocculation treatment enhanced the efficiency of vacuum preloading and mitigated the clogging of slurry. Compared to untreated slurry, the lime-flocculated slurry exhibited an approximately 248% increase in pore water pressure dissipation, a 462% increase in clogging zone width, and an 80% improvement in slurry strength near the PVD. The dual use of PAC and APAM significantly improved the slurry's filtration performance by approximately 77 s, resulting in the highest water discharge rate (47% higher than untreated slurry) under vacuum pressure. In contrast, APAM alone enhanced the water discharge rate primarily in the early stages of vacuum preloading but had a limited effect on the final water discharge volume and horizontal strain. Furthermore, this study investigated the evolution of the clogging zone in flocculated slurry and elucidated the underlying mechanism of flocculation in mitigating the clogging of slurry. The findings can provide a theoretical basis for the selection of flocculants and the arrangement of PVDs in large-scale land reclamation and dredged slurry treatment projects.
Keyword ：
clogging clogging dredged slurry dredged slurry flocculation flocculation particle image velocimetry particle image velocimetry vacuum preloading vacuum preloading
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| GB/T 7714 | Lu, Jingling , Zhang, Xuexing , Yang, Zhengxian et al. Flocculation Treatment for Mitigating Clogging of Dredge Slurry Under Vacuum Preloading with Particle Image Velocimetry Analysis [J]. | APPLIED SCIENCES-BASEL , 2025 , 15 (6) . |
| MLA | Lu, Jingling et al. "Flocculation Treatment for Mitigating Clogging of Dredge Slurry Under Vacuum Preloading with Particle Image Velocimetry Analysis" . | APPLIED SCIENCES-BASEL 15 . 6 (2025) . |
| APA | Lu, Jingling , Zhang, Xuexing , Yang, Zhengxian , Xu, Shanlin . Flocculation Treatment for Mitigating Clogging of Dredge Slurry Under Vacuum Preloading with Particle Image Velocimetry Analysis . | APPLIED SCIENCES-BASEL , 2025 , 15 (6) . |
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Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) is a material with superior mechanical characteristics which are attributed to the use of a high-volume fraction of steel fibers and an ultra-high strength cementitious matrix. One of the key challenges of the use of UHPFRC is its increased cost and the scatter of the mechanical characteristics which are both attributed to the addition of a high-volume fraction of steel fibers. A suitable fiber orientation method could have significant benefits towards the improvement of the mechanical performance of UHPFRC. This paper is focused on a systematic study of the effect of electromagnetic field and chute fiber orientation with vibration table methods on the tensile strength of UHPFRC with various steel fiber volume fractions (Vf: 1 %, 2 %, and 3 %). In addition to the mechanical testing, X-ray CT scan image analyses were conducted to quantitatively evaluate fiber orientation. The 2D slices produced by the X-ray CT scan image analyses clearly show the effectiveness of the steel fiber orientation method and showed potential for further improvement. The results of this research show that the application of suitable orientation methods can lead to significant reduction of the required volume fraction of steel fibers and subsequent cost reduction, as the results of UHPFRC with 3 % and 2 % fibers lead to similar results to the UHPFRC with 2 % and 1 % oriented steel fibers respectively. Also, a numerical tensile constitutive model was developed for UHPFRC with oriented fibers, based on the experimental results. The proposed model can facilitate the extensive use of UHPFRC as it be used by practitioners for the analysis and design of UHPFRC element/structures.
Keyword ：
Concrete Concrete Constitutive model Constitutive model Fiber orientation Fiber orientation Mechanical property Mechanical property Optimal design Optimal design Steel fiber Steel fiber Ultra-High Performance Fiber Reinforced Ultra-High Performance Fiber Reinforced X-ray CT X-ray CT
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| GB/T 7714 | Xue, Junqing , Mao, Shengrong , Cacciola, Pierfrancesco et al. Improving the mechanical performance of UHPFRC using fiber orientation: Experimental investigation, microstructural analysis, and numerical modeling [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 476 . |
| MLA | Xue, Junqing et al. "Improving the mechanical performance of UHPFRC using fiber orientation: Experimental investigation, microstructural analysis, and numerical modeling" . | CONSTRUCTION AND BUILDING MATERIALS 476 (2025) . |
| APA | Xue, Junqing , Mao, Shengrong , Cacciola, Pierfrancesco , Contento, Alessandro , Lampropoulos, Andreas , Nicolaides, Demetris et al. Improving the mechanical performance of UHPFRC using fiber orientation: Experimental investigation, microstructural analysis, and numerical modeling . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 476 . |
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Ternary blended cement represents a promising option for effectively reducing CO2 emissions caused by cement production. This study examines the hydration kinetics of ternary cement containing ultrafine steel slag (USS) and blast-furnace slag (BFS) at elevated temperatures. The results reveal that high-temperature curing significantly accelerates the hydration kinetics of the ternary cement. The governing mechanism of the hydration reaction evolves with increasing temperature. The hydration rate at 60 degrees C experiences a notable acceleration, accompanied by a decrease in the induction period and an enhancement alumina reaction, transitioning the hydration kinetics from NG-*I-*D to NG-*D. The low reactivity and inert components of USS lead to the tendency of forming a relatively loose microstructure of hardened paste. In contrast, the flocculent C(-A)-S-H gel formed after incorporating BFS contributes to a denser and more uniform microstructure, owing to the synergistic hydration effect between USS and BFS. Moreover, increasing the temperature promotes the hydration reactions of f-CaO and f-MgO, thereby enhancing the apparent density of the reaction products and reducing the risk caused by volume instability. The findings address a key limitation of SS-based binders and emphasizes the potential of USS-BFS ternary cement as a sustainable alternative with reduced environmental impact.
Keyword ：
Hydration kinetics Hydration kinetics Microstructure Microstructure Synergistic hydration effect Synergistic hydration effect Temperature Temperature Ternary cement Ternary cement
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| GB/T 7714 | Li, Kang , Yang, Zhengxian , Dong, Shilin et al. Hydration heat and kinetics of ternary cement containing ultrafine steel slag and blast-furnace slag at elevated temperatures [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 471 . |
| MLA | Li, Kang et al. "Hydration heat and kinetics of ternary cement containing ultrafine steel slag and blast-furnace slag at elevated temperatures" . | CONSTRUCTION AND BUILDING MATERIALS 471 (2025) . |
| APA | Li, Kang , Yang, Zhengxian , Dong, Shilin , Ning, Pingping , Ye, Dejun , Zhang, Yong . Hydration heat and kinetics of ternary cement containing ultrafine steel slag and blast-furnace slag at elevated temperatures . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 471 . |
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The desired anticorrosive effect of rebar through photocathodic protection of TiO2 is challenging due to its wide bandgap and high recombination rate of photogenerated carriers. This study demonstrates that the CuInSe2/TiO2 nanocomposites, which consist of novel TiO2 nanobowls and CuInSe2 nanoparticles, can significantly enhance the corrosion-resistant performance of HRB400 steel rebar. The CuInSe2/TiO2 nanocomposite films, featuring an n-n heterostructure, were fabricated by hydrothermally synthesizing n-type CuInSe2 nanoparticles onto anodic oxidation-prepared n-type TiO2 nanobowl films. Notably, the CuInSe2 nanoparticles significantly enhanced the light absorption properties of TiO2, particularly in the visible light range. The presence of heterogeneous interfaces in the CuInSe2/TiO2 films effectively reduced the carrier recombination rate. Under visible light irradiation, the photocurrent density of CuInSe2/TiO2 photoanode (CT-5: 17.37 mu A/cm2) was significantly higher compared to that observed for the TiO2 photoanode (1.05 mu A/cm2). Moreover, in a simulated concrete pore solution containing 3.5 wt% NaCl, the photocathodic protection potential (OCP value) of HRB400 rebar coupled with CT-5 was approximately -820 mV (vs. SCE), which is significantly more negative than that of the -630 mV observed for the rebar coupled with TiO2. Therefore, the novel CuInSe2/TiO2 n-n heterojunction films exhibited remarkable photocathodic protection for the HRB400 rebar, demonstrating that the heterojunction enhances the corrosion resistance of TiO2 for steel rebars.
Keyword ：
CuInSe 2 CuInSe 2 HRB400 steel rebar HRB400 steel rebar Photocathodic protection Photocathodic protection Simulated concrete pore solution Simulated concrete pore solution
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| GB/T 7714 | Wang, Wencheng , Yu, Haoyang , Yang, Zhengxian et al. Photocathodic protection performance of CuInSe2/TiO2 n-n heterojunction films for HRB400 steel rebar under visible light [J]. | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2025 , 715 . |
| MLA | Wang, Wencheng et al. "Photocathodic protection performance of CuInSe2/TiO2 n-n heterojunction films for HRB400 steel rebar under visible light" . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 715 (2025) . |
| APA | Wang, Wencheng , Yu, Haoyang , Yang, Zhengxian , Wang, Wenhui , Zhang, Qichao , Jiang, Yishan et al. Photocathodic protection performance of CuInSe2/TiO2 n-n heterojunction films for HRB400 steel rebar under visible light . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2025 , 715 . |
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This review paper carefully examines ion-doped non-hydraulic calcium silicates' carbonation behavior and properties, notably gamma-C2S, C3S2, and CS, emerging as viable materials for sustainable construction applications. The carbonation process of these materials offers the combined benefits of increased durability and CO2 sequestration, providing a potential pathway to mitigate the environmental impact of conventional cement. Through foreign ion doping (e.g., barium, magnesium, and sodium), carbonation reactivity and compressive strength are significantly enhanced due to the formation of stable calcium carbonate polymorphs (such as calcite and aragonite) and densified matrices. Magnesium doping is noted for its efficacy, yielding a 40 % enhancement in carbonation reactivity and an increase of up to 115 MPa in compressive strength of gamma-C2S under optimal curing conditions. Key experimental parameters, such as CO2 concentration, temperature, and relative humidity, influence carbonation reactivity and are essential for the pilot-scale application of these materials in the construction industry. The review also discusses future research directions, including the potential for multi-dopant systems, AI-based curing optimization, and long-term durability studies under varied environmental conditions. This review provides a fundamental perspective on the current advances and challenges of using ion-doped nonhydraulic calcium silicates as sustainable binders in the construction sector.
Keyword ：
Calcium silicates Calcium silicates Carbonation properties Carbonation properties Carbon sequestration Carbon sequestration Ion-doped Ion-doped
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| GB/T 7714 | Ndzila, Jaures Syntyche , Yang, Zhengxian . Carbonation properties of ion-doped non-hydraulic calcium silicate binders: A review [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 . |
| MLA | Ndzila, Jaures Syntyche et al. "Carbonation properties of ion-doped non-hydraulic calcium silicate binders: A review" . | JOURNAL OF BUILDING ENGINEERING 105 (2025) . |
| APA | Ndzila, Jaures Syntyche , Yang, Zhengxian . Carbonation properties of ion-doped non-hydraulic calcium silicate binders: A review . | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 . |
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Ultra-high-performance concrete (UHPC) is renowned for its exceptional strength and durability, but the undesirable high material cost due to the considerable expense of reinforcing steel fiber hinders its wide application. The incorporation of more sustainable and light synthetic fibers presents a promising avenue for lowering the price and weight of UHPC while affecting the rheological and hardened behavior of UHPC. This paper conducts a comprehensive review of the key parameters of synthetic fibers, including content, aspect ratio, and surface properties, and their impacts on the fresh properties, mechanical performance, durability, and volume stability of UHPC. Particular emphasis is placed on the early and long-term performance of UHPC. Additionally, the sustainability of UHPC with various types of synthetic fibers is compared. By delving into these aspects, this study aims to furnish a constructive reference for engineers and decisionmakers regarding the utilization of synthetic fibers in UHPC to achieve optimal early and longterm performance.
Keyword ：
Ductility Ductility Durability Durability Sustainability Sustainability Synthetic fibers Synthetic fibers UHPC UHPC Volume stability Volume stability
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| GB/T 7714 | Yang, Zhengxian , Zheng, Zelong , Xu, Pu et al. Effect of synthetic fibers on early and long-term performance of UHPC: A review [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 101 . |
| MLA | Yang, Zhengxian et al. "Effect of synthetic fibers on early and long-term performance of UHPC: A review" . | JOURNAL OF BUILDING ENGINEERING 101 (2025) . |
| APA | Yang, Zhengxian , Zheng, Zelong , Xu, Pu , Ning, Pingping , Hu, Jie , Petrou, Michael F. et al. Effect of synthetic fibers on early and long-term performance of UHPC: A review . | JOURNAL OF BUILDING ENGINEERING , 2025 , 101 . |
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NOx is a harmful gas that causes respiratory diseases and acid rain. Commonly used photocatalysts for degrading NOx such as UV responsive TiO2 show weak photocatalytic degradation efficiency under visible light. Furthermore, the great concern is that the degradation product, nitrates (NO3), from NOx could be washed away and increase the nitrogen deposition and eutrophication in the surrounding soil and aquatic environments, resulting in serious secondary pollution. To address these issues, this study proposes a novel solution by incorporating S-g-C3N4/MgAl-CLDH nanocomposites into a cementitious system which features high NOx degradation efficiency under visible light condition and the efficient capture and adsorption of NO3 in situ. The NOx degradation was comprehensively studied, encompassing the influencing factors and stability. The mechanism for NO3 adsorption process was expounded using the isothermal model. The results show that the amount of exposed S-g-C3N4/MgAl-CLDH and the contact area between S-g-C3N4/MgAl-CLDH and NOx are the essential reasons affecting the NOx degradation. The NOx degradation ability of photocatalytic mortar exhibits excellent stability with the NOx removal ratio decreasing by only 4.8 % and 14.5% after ten consecutive tests and 120 min of ultrasonic washing, respectively. Furthermore, S-g-C3N4/MgAl-CLDH increases the NO3 adsorption capacity of photocatalytic mortar by about 1.5 times, and the adsorption process of NO3 follows the Freundlich isotherm. The study offers an alternate method for designing innovative nanocomposites in cement-based materials to control environmental pollution.
Keyword ：
Grey correlation analysis Grey correlation analysis NO3-adsorption NO3-adsorption Photocatalytic cement mortar Photocatalytic cement mortar
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| GB/T 7714 | Lu, Lin , Yang, Zhengxian , Li, Bo et al. Photocatalytic NOx degradation and NO3- adsorption by mortar modified with S-g-C3N4/MgAl-CLDH: Influence factors and stability [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (6) . |
| MLA | Lu, Lin et al. "Photocatalytic NOx degradation and NO3- adsorption by mortar modified with S-g-C3N4/MgAl-CLDH: Influence factors and stability" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 12 . 6 (2024) . |
| APA | Lu, Lin , Yang, Zhengxian , Li, Bo , Ye, Dejun , Luo, Shengyang , Marano, Giuseppe Carlo . Photocatalytic NOx degradation and NO3- adsorption by mortar modified with S-g-C3N4/MgAl-CLDH: Influence factors and stability . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (6) . |
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The introduction of high-volume steel slag into ordinary Portland cement (OPC) has a negative effect on the pore structure due to its poor hydraulic reactivity. Synergistic effects between steel slag and ground granulated blast furnace slag (GGBFS) in cementitious system have drawn increasing attention. In this study, the modified Andreasen and Andersen (MAA) model was adopted for the mixture design of ternary cementitious system incorporating high-volume ultrafine steel slag (USS) and GGBFS without a compromise in strength. X-ray computed tomography (X-CT) and mercury intrusion porosimetry (MIP) were applied to characterize the pore structure of various cementitious mortars in terms of porosity, pore size, pore number, pore morphology and homogeneity. Results manifested that the adverse impact of USS addition on the pore structure of binary cement was effectively mitigated in the ternary cement USS-GGBFS-OPC after mixture optimization, whereby the pore size was shifted toward a finer distribution and simultaneously with a higher uniformity and consequently promoting the compressive strength development. An increase of cumulative pore volume as captured by X-CT was associated with an exponential decrease of the number of pores while together with larger pore sizes. The increase in the number of small pores led to an increase in the pore tortuosity and degree of sphericity. The fractal dimension of pores was negatively correlated with pore inhomogeneity and compressive strength. These findings provide new insights into homogeneity-oriented mixture design of composite cementitious binders based on gap-graded particle packing, together with their synergistic effects on hydration progress.
Keyword ：
Fractal dimension Fractal dimension Homogeneity Homogeneity Particle packing optimization Particle packing optimization Pore structure Pore structure Ultrafine steel slag Ultrafine steel slag X-ray computed tomography X-ray computed tomography
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| GB/T 7714 | Yang, Zhengxian , Dong, Shilin , Zhang, Yong . Particle packing optimization and pore structure assessment of ternary cementitious system based on X-ray computed tomography and mercury intrusion porosimetry [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 413 . |
| MLA | Yang, Zhengxian et al. "Particle packing optimization and pore structure assessment of ternary cementitious system based on X-ray computed tomography and mercury intrusion porosimetry" . | CONSTRUCTION AND BUILDING MATERIALS 413 (2024) . |
| APA | Yang, Zhengxian , Dong, Shilin , Zhang, Yong . Particle packing optimization and pore structure assessment of ternary cementitious system based on X-ray computed tomography and mercury intrusion porosimetry . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 413 . |
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以内掺纳米TiO2为光催化剂,钢渣和矿渣粉为胶材,大钢渣颗粒为骨料,制备了 TiO2改性钢渣基透水混凝土(TSSPC),并研究了 TiO2掺量对TSSPC的抗压强度、透水性能和NO,降解性能的影响.此外,结合XRD和SEM-EDX等微观测试分析方法,阐明了 TiO2对TSSPC力学性能、透水性能和光催化性能的影响机理,为TiO2在透水混凝土中的应用奠定了基础.结果表明,当TiO2掺量较少时,TiO2颗粒的"晶核效应"对胶凝材料的早期水化有促进作用.但当TiO2掺量较多时,TiO2颗粒易发生团聚,不利于TSSPC的力学性能发展.此外,随着TiO2掺量的提高,透水混凝土的连通孔隙率和透水系数均上升.相较于空白对照组,TiO2掺量为5％(质量分数,下同)的TSSPC的连通孔隙率和透水系数分别提高了 4.5个百分点和1.34 mm·s-1.TSSPC对NOx的降解效率随着TiO2掺量(0％～5％)的增加而提高,当TiO2掺量超过3％时,继续增加TiO2掺量对NOx降解效率的提升效果显著下降.
Keyword ：
NOx降解 NOx降解 TiO2 TiO2 力学性能 力学性能 透水混凝土 透水混凝土 钢渣 钢渣
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| GB/T 7714 | 林元明 , 林佳福 , 熊晓立 et al. TiO2改性钢渣基透水混凝土的力学和NOx降解性能研究 [J]. | 硅酸盐通报 , 2024 , 43 (1) : 191-199 . |
| MLA | 林元明 et al. "TiO2改性钢渣基透水混凝土的力学和NOx降解性能研究" . | 硅酸盐通报 43 . 1 (2024) : 191-199 . |
| APA | 林元明 , 林佳福 , 熊晓立 , 杨政险 . TiO2改性钢渣基透水混凝土的力学和NOx降解性能研究 . | 硅酸盐通报 , 2024 , 43 (1) , 191-199 . |
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