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学者姓名：杨政险
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Abstract ：
研究了2,2-二溴-3-次氮基丙酰胺(DBNPA)与鼠李糖脂(RL)对X80管线钢在硫酸盐还原菌Desulfovibrio bizertensis SY-1中的腐蚀行为影响.结果表明,Desulfovibrio bizertensis SY-1存在时,X80管线钢的腐蚀失重和点蚀深度明显增加,且表面检测出FeS腐蚀产物.DBNPA的添加,抑制了浮游及固着SRB的生长,减缓了X80管线钢的腐蚀.150 mg/L DBNPA与500 mg/LRL进行复配时,X80管线钢的腐蚀速率与SRB体系相比降低了 77.8％(p=0.009),与单独使用 300 mg/L DBNPA相比降低了 50％.另外,150 mg/L DBNPA与 500 mg/L RL复配时,X80管线钢腐蚀浸泡15 d后的腐蚀电流密度与SRB体系相比降低了 84.7％,与单独使用300 mg/L DBNPA的SRB体系相比降低了 20.5％,可显著抑制X80管线钢的微生物腐蚀.
Keyword ：
2 2 2-二溴-3-次氮基丙酰胺 2-二溴-3-次氮基丙酰胺 X80管线钢 X80管线钢 微生物腐蚀 微生物腐蚀 硫酸盐还原菌 硫酸盐还原菌 鼠李糖脂 鼠李糖脂
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| GB/T 7714 | 王娅利 , 管方 , 段继周 et al. 鼠李糖脂与2,2-二溴-3-次氮基丙酰胺协同抑制X80管线钢的微生物腐蚀 [J]. | 中国腐蚀与防护学报 , 2024 , 44 (6) : 1412-1422 . |
| MLA | 王娅利 et al. "鼠李糖脂与2,2-二溴-3-次氮基丙酰胺协同抑制X80管线钢的微生物腐蚀" . | 中国腐蚀与防护学报 44 . 6 (2024) : 1412-1422 . |
| APA | 王娅利 , 管方 , 段继周 , 张丽娜 , 杨政险 , 侯保荣 . 鼠李糖脂与2,2-二溴-3-次氮基丙酰胺协同抑制X80管线钢的微生物腐蚀 . | 中国腐蚀与防护学报 , 2024 , 44 (6) , 1412-1422 . |
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In this paper, three alkaline activators, namely sodium hydroxide (SH), calcium oxide and sodium carbonate (COSC), calcium hydroxide and sodium sulfate (CHSS), and the influence of different alkali equivalents on the carbonation resistance of alkali -activated slag concrete (AASC) were investigated. By testing the mechanical properties at different carbonation ages of AASC with three types of activators at varying alkali equivalents (4%, 6%, and 8%), along with the changes in carbonation depth, this study aims to characterize hydration products and porosity through microstructural analysis. The objective is to explain the mechanism by which carbonation affects the AASC structure. The findings showed that the carbonation rate (i.e., the growth rate of the carbonation depth) of AASC was CHSS > COSC > SH when the exciter dosages were the same, and the carbonation rate of all samples tended to slow down as the alkali components increased. Calcite and spherulite were the calcium carbonate morphologies after SH, COSC, and CHSS carbonation according to XRD, TG/DSC, and pore structure tests; the calcium carbonate content decreased with increasing alkali equivalent after carbonation. Since the pore -increasing effect of carbonation due to the destruction of C -S -H is weaker than the filling effect produced by calcium carbonate, the total pore volume of SH, COSC, and CHSS decreased due to the activator effect after carbonation. Specifically, the calcium carbonate created by carbonation repairs pores and cracks of matrix, but its presence also reduces the calcium hydroxide concentration, leading to a decrease in the alkalinity of the pore solution, which disrupts the structure of the hydration products and loosens the matrix. The focus is on which aspect is more decisive. Interestingly, small pores however decreased, while there was an increase in larger pore sizes resulting in a change in pore size distribution. However, this negative impact on pore distribution decreased with increasing alkali dosage.
Keyword ：
Alkali equivalent Alkali equivalent Anti-carbonation Anti-carbonation Carbonation depth Carbonation depth Compressive strength Compressive strength Porosity Porosity
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| GB/T 7714 | Shi, Peng , Falliano, Devid , Yang, Zhengxian et al. Investigation on the anti-carbonation properties of alkali-activated slag concrete: Effect of activator types and dosages [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 91 . |
| MLA | Shi, Peng et al. "Investigation on the anti-carbonation properties of alkali-activated slag concrete: Effect of activator types and dosages" . | JOURNAL OF BUILDING ENGINEERING 91 (2024) . |
| APA | Shi, Peng , Falliano, Devid , Yang, Zhengxian , Marano, Giuseppe Carlo , Briseghella, Bruno . Investigation on the anti-carbonation properties of alkali-activated slag concrete: Effect of activator types and dosages . | JOURNAL OF BUILDING ENGINEERING , 2024 , 91 . |
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Cow dung possesses potential agricultural and energy value but is often regarded as waste and underutilized in most cases. This wastage of resources not only poses a challenge to agricultural sustainability but also limits economic development in rural areas. Cow dung contains natural cellulose components like cellulose and lignin that are derived and used to prepare fiber materials. This paper explores a potential value-added application of agricultural waste, i.e., cow dung fibers to reinforce the alkali-activated slag composites (AASC), which are fabricated based on an industrial by-product slag. The raw and alkali treated cow dung fibers were characterized using scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), thermo-gravimetric analysis (TGA) and X-ray diffraction (XRD). The porosity, density, water absorption, strength and drying shrinkage of AASC were tested and used to evaluate the effect of alkali treated fibers on the properties of AASC. The results showed that subjecting cow dung fibers to alkali treatment improved their surface roughness and thermal stability. The addition of cow dung fibers led to an augmentation in the splitting tensile strength of AASC, primarily due to the bridging action of these fibers. In particular, the 28-day splitting tensile strength of AASC containing 1 wt% of untreated cow dung fibers increased by 17.1% over the reference sample, and this increase was more pronounced in the alkali treated fiber sample. Moreover, the alkali treatment effectively reduced the effects of loss of compressive strength and increased drying shrinkage caused by fiber incorporation. The findings of this paper are helpful to solve the management problems of cow dung waste, reduce the environmental burden and realize the value utilization of resources.
Keyword ：
Alkali-activated slag composites Alkali-activated slag composites Cow dung fibers Cow dung fibers Microstructure Microstructure Strength Strength Treatment Treatment
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| GB/T 7714 | Yang, Zhengxian , Li, Kang , Yan, Xueyuan et al. Characterization and value-added applications of natural cellulose fibers derived from cow dung in cementitious composites [J]. | CELLULOSE , 2024 , 31 (9) : 5575-5589 . |
| MLA | Yang, Zhengxian et al. "Characterization and value-added applications of natural cellulose fibers derived from cow dung in cementitious composites" . | CELLULOSE 31 . 9 (2024) : 5575-5589 . |
| APA | Yang, Zhengxian , Li, Kang , Yan, Xueyuan , Wu, Wenda , Briseghella, Bruno , Marano, Giuseppe Carlo . Characterization and value-added applications of natural cellulose fibers derived from cow dung in cementitious composites . | CELLULOSE , 2024 , 31 (9) , 5575-5589 . |
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A new nanocomposite g-C3N4/CoAl-LDH was synthesized and implemented to make alkali-activated steel slagbased photocatalytic pervious concrete (ASSPPC). The water permeability, compressive strength, microstructure, and NOx degradation ability of ASSPPC were investigated. The results show that at lower dosages (1 wt% and 3 wt%), the spherical structure facilitates excellent dispersion of g-C3N4/CoAl-LDH within the matrix, which leads to reduced matrix porosity, resulting in improved compressive strength and reduced water permeability in ASSPPC. Compared to control previous concrete, the compressive strength of ASSPPC with 1 wt% g-C3N4/CoAl- LDH increased by 6.3%, and water permeability of which decreased by 15.4%, respectively. However, at higher dosages (5 wt%), g-C3N4/CoAl-LDH tends to agglomerate, causing lower hydration degree and higher matrix porosity. Moreover, owing to the remarkable alkali resistance of g-C3N4/CoAl-LDH, ASSPPC with this photocatalyst only marginally decreases its NOx degradation ability as the curing age increases. When considering water permeability, compressive strength, and NOx degradation ability, ASSPPC with 3 wt% g-C3N4/CoAl-LDH demonstrates optimal performance, which gives both compressive strength and water permeability equivalent to pervious concrete without photocatalyst while exhibiting a NOx degradation rate 0.58 times higher than that of ASSPPC with 3 wt% g-C3N4.
Keyword ：
Alkali-activation Alkali-activation Ground granulated blast furnace slag Ground granulated blast furnace slag NOx degradation NOx degradation Pervious concrete Pervious concrete Steel slag Steel slag
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| GB/T 7714 | Chen, Shanghong , Xiong, Xiaoli , Yang, Zhengxian et al. The microstructure and NOx degradation ability of alkali-activated steel slag-based pervious concrete doped with g-C3N4/CoAl-LDH [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 419 . |
| MLA | Chen, Shanghong et al. "The microstructure and NOx degradation ability of alkali-activated steel slag-based pervious concrete doped with g-C3N4/CoAl-LDH" . | CONSTRUCTION AND BUILDING MATERIALS 419 (2024) . |
| APA | Chen, Shanghong , Xiong, Xiaoli , Yang, Zhengxian , Lin, Jiafu , Zhang, Jianfu , Briseghella, Bruno et al. The microstructure and NOx degradation ability of alkali-activated steel slag-based pervious concrete doped with g-C3N4/CoAl-LDH . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 419 . |
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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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In this paper, an advanced photocatalyst, B-TiO2/MgAl-CLDH, was synthesized and applied in cement mortar. The photocatalytic NOx degradation ability of cement mortar containing B-TiO2/MgAl-CLDH under different initial NOx concentrations and flow rates was investigated. The results show that B-TiO2/MgAl-CLDH has stronger visible light absorption, lower recombination rate of electron-hole pairs and narrower optical band gap than commercial nano-TiO2 (P25), resulting in enhanced NOx removal efficiency. Specifically, the maximum NOx degradation ratio of B-TiO2/MgAl-CLDH is 23.4% within 30 min, which is about 5 times that of P25. For photocatalytic mortar, the initial NOx concentration (from 1.0 ppm to 2.0 ppm) and flow rate (from 1 L/min to 3 L/ min) were positively correlated with NOx removal amount, while negatively correlated with NOx removal ratio. Based on the internal molecular diffusion properties of NOx, Langmuir-Hinshelwood and the power law kinetic models were used to predict the NOx degradation ability of photocatalytic mortar. The modeling of NOx degradation process presents a reliable prediction of the NOx removal ability of photocatalytic mortar, serving as a valuable tool for assessing the mortar's NOx removal effectiveness for policymakers and engineers.
Keyword ：
B-TiO2/MgAl-CLDH B-TiO2/MgAl-CLDH Cementitious materials Cementitious materials Kinetic analysis Kinetic analysis NO x degradation NO x degradation Visible light Visible light
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| GB/T 7714 | Xiong, Xiaoli , Xu, Jiankun , Yang, Zhengxian et al. NOx degradation by cement mortar containing B-TiO2/MgAl-CLDH under visible light: Experimental and modeling [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (3) . |
| MLA | Xiong, Xiaoli et al. "NOx degradation by cement mortar containing B-TiO2/MgAl-CLDH under visible light: Experimental and modeling" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 12 . 3 (2024) . |
| APA | Xiong, Xiaoli , Xu, Jiankun , Yang, Zhengxian , Chen, Weigang , Zhang, Jianfu , Marano, Giuseppe Carlo . NOx degradation by cement mortar containing B-TiO2/MgAl-CLDH under visible light: Experimental and modeling . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2024 , 12 (3) . |
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研发了可用于生锈碳钢表面的醋酸激发水泥基防腐涂层。试验设计了19组配合比，通过综合考察水泥基材料的力学性能、粘结强度和涂层涂装性能，确定了涂层最优配比。通过X射线衍射试验、水化热试验和扫描电镜测试，阐述了醋酸激发水泥的作用机理；通过电化学阻抗试验研究了涂层的防腐性能。结果表明，醋酸激发能够加速水泥早期水化反应，浆体硬化时间缩短，促进早期强度发展；醋酸使水泥颗粒团被分散，涂层表面水泥颗粒之间连接紧密，涂层密度高、防锈性能良好，其在3.5%NaCl溶液中浸泡20 d的电荷转移电阻仍可达到3.68×10~5Ω·cm~2。
Keyword ：
水化热 水化热 水泥基材料 水泥基材料 电化学阻抗 电化学阻抗 酸激发 酸激发 钢铁锈蚀 钢铁锈蚀 防腐涂层 防腐涂层
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| GB/T 7714 | 王嘉豪 , 陈柏全 , 杨政险 . 用于生锈碳钢表面的醋酸激发水泥基防腐涂层性能研究 [J]. | 武汉理工大学学报 , 2024 , 46 (05) : 1-8 . |
| MLA | 王嘉豪 et al. "用于生锈碳钢表面的醋酸激发水泥基防腐涂层性能研究" . | 武汉理工大学学报 46 . 05 (2024) : 1-8 . |
| APA | 王嘉豪 , 陈柏全 , 杨政险 . 用于生锈碳钢表面的醋酸激发水泥基防腐涂层性能研究 . | 武汉理工大学学报 , 2024 , 46 (05) , 1-8 . |
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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. © 2024 Elsevier Ltd
Keyword ：
Acid rain Acid rain Eutrophication Eutrophication Gas adsorption Gas adsorption Nitrogen removal Nitrogen removal Photocatalytic activity Photocatalytic activity Photodegradation Photodegradation Soil cement Soil cement Soil pollution Soil pollution Soil pollution control Soil pollution control Ultrasonic cleaning Ultrasonic cleaning Ultrasonic testing Ultrasonic testing
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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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To investigate the issues of transverse through cracks and interlayer damage of the CRTS III slab ballastless track under train loading, the digital image correlation (DIC) technique was employed to reveal the damage mechanisms of the reduced-scale concrete of track slab structural concrete (TSSC) and track slab-filled laminated structural concrete (TSLSC). The results indicate that under train loading, the transverse through cracks of TSLSC exhibit a multi-stage, layer-by-layer cracking characteristic, and there is a risk of cracking in ballastless track when the bottom longitudinal strain exceeds 0.0004. The sudden increase in interlayer longitudinal shear strain difference in the third stage under train loading demonstrates that shear stress is the primary cause of interlayer damage in ballastless track. Tensile damage models based on ultimate stress-strain relationship and yield-fracture strain were established, and a non-contact testing method for the constitutive relationship and energy absorption effect of ballastless track was proposed using DIC technology, aiming to provide reference for the analysis and prediction of ballastless track damage under train loading.
Keyword ：
Ballastless track of high-speed railway Ballastless track of high-speed railway Constitutive relationship Constitutive relationship DIC DIC Energy absorption properties Energy absorption properties Fracture behavior Fracture behavior
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| GB/T 7714 | Li, Huajian , Dong, Haoliang , Wen, Jiaxin et al. Fracture behavior investigation of ballastless track of high-speed railway based on DIC technique [J]. | ENGINEERING FAILURE ANALYSIS , 2024 , 158 . |
| MLA | Li, Huajian et al. "Fracture behavior investigation of ballastless track of high-speed railway based on DIC technique" . | ENGINEERING FAILURE ANALYSIS 158 (2024) . |
| APA | Li, Huajian , Dong, Haoliang , Wen, Jiaxin , Yang, Zhiqiang , Yang, Zhengxian , Huang, Fali et al. Fracture behavior investigation of ballastless track of high-speed railway based on DIC technique . | ENGINEERING FAILURE ANALYSIS , 2024 , 158 . |
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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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