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学者姓名：王雪芳
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Abstract ：
This study develops an alkali-activated slag-electric furnace nickel slag (AAS-ENS) composite system by incorporating electric furnace nickel slag (ENS) and granulated blast furnace slag (GBFS) to explore a sustainable and high-value utilization pathway for ENS. The Ca/Si and Si/Al ratios of the precursor materials were adjusted by controlling the GBFS dosage, and their effects on the compressive strength, flexural strength, and microstructure of AAS-ENS composites were systematically investigated. The results indicate that compressive strength exhibits a quadratic relationship with the Ca/Si ratio, with an optimal range of 0.35-0.45. Additionally, the Si/Al ratio shows a negative correlation with compressive strength, with the optimal Si/Al ratio estimated to be below 4. Microstructural analysis, including heat of hydration, X-ray diffraction (XRD), thermogravimetric analysis (TG-DTG), mercury intrusion porosimetry (MIP), and scanning electron microscopy (SEM), revealed that properly balanced Ca/Si and Si/Al ratios promote the formation of C-(A)-S-H gel, leading to higher material density and improved mechanical performance. These findings provide a theoretical foundation for optimizing the mechanical properties and microstructure of AAS-ENS composites and offer practical insights into the sustainable utilization of ENS in eco-friendly construction materials.
Keyword ：
Ca/Si ratio Ca/Si ratio Electric furnace nickel slag Electric furnace nickel slag Mechanical properties Mechanical properties Si/Al ratio Si/Al ratio
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| GB/T 7714 | Wang, Xuefang , Peng, Zixuan , Li, Xianpeng et al. Tailoring mechanical properties of alkali activated slag-electric furnace nickel slag composite system through Ca/Si and Si/ Al ratios [J]. | CASE STUDIES IN CONSTRUCTION MATERIALS , 2025 , 22 . |
| MLA | Wang, Xuefang et al. "Tailoring mechanical properties of alkali activated slag-electric furnace nickel slag composite system through Ca/Si and Si/ Al ratios" . | CASE STUDIES IN CONSTRUCTION MATERIALS 22 (2025) . |
| APA | Wang, Xuefang , Peng, Zixuan , Li, Xianpeng , Sun, Huaqiang , Xu, Liwei , Wu, Wenda . Tailoring mechanical properties of alkali activated slag-electric furnace nickel slag composite system through Ca/Si and Si/ Al ratios . | CASE STUDIES IN CONSTRUCTION MATERIALS , 2025 , 22 . |
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To efficiently and environmentally utilize industrial waste nickel slag and enhance the high-temperature performance of construction materials, this study prepared a binary geopolymer using nickel slag and blast furnace slag as raw materials. By leveraging the advantages of both materials and adjusting the ratio between nickel slag and blast furnace slag, the thermal stability of the geopolymer at high temperatures was improved. This study examined the mechanical properties, mass loss, and thermal deformation behavior of the geopolymer under high-temperature exposure. X-ray diffraction (XRD) and thermogravimetric analysis (TGA) were employed to examine the decomposition and phase transformation of the geopolymer at elevated temperatures. Mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) were used to characterize the pore structure and microstructure after exposure to various high temperatures. The results revealed that the formation of novel phases, including diopside, forsterite, and spinel, significantly enhances the thermal stability of the geopolymer incorporating nickel slag. Additionally, the C-(A)-S-H gel formed during slag hydration fills the pores, improving the matrix density. This contributes positively to the high-temperature resistance of geopolymers with high slag content. Overall, with a blending ratio of 20 % nickel slag and 80 % blast furnace slag, the geopolymer achieved a compressive strength of 59.7 MPa at 28 days. Under high-temperature conditions of 200, 400, 600, and 800°C, the compressive strength retention of the geopolymer increased by 11.5 %, 24.8 %, 10.8 %, and 5.8 %, respectively, compared to the pure blast furnace slag system. Additionally, mass loss was reduced by 1.01 %, 0.81 %, 0.73 %, and 0.7 %, and thermal shrinkage at 800°C was reduced by 3.07 %. Given its superior high-temperature resistance, the nickel slag-slag based binary geopolymers holds promise as a new type of green building material suitable for high-temperature environments. © 2025
Keyword ：
Bulk Density Bulk Density Compressive strength Compressive strength Hydroelasticity Hydroelasticity Machinability Machinability Slags Slags Tenacity Tenacity Weldability Weldability
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| GB/T 7714 | Wang, Jize , Kang, Sixiang , Zhang, Dongliang et al. Study of thermal resistance and regulation mechanisms in nickel slag-slag based binary geopolymers [J]. | Case Studies in Construction Materials , 2025 , 22 . |
| MLA | Wang, Jize et al. "Study of thermal resistance and regulation mechanisms in nickel slag-slag based binary geopolymers" . | Case Studies in Construction Materials 22 (2025) . |
| APA | Wang, Jize , Kang, Sixiang , Zhang, Dongliang , Wu, Wenda , Zhang, Feng , Wang, Xuefang et al. Study of thermal resistance and regulation mechanisms in nickel slag-slag based binary geopolymers . | Case Studies in Construction Materials , 2025 , 22 . |
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The use of alkali-activated cementitious materials (AACMs) and sea sand to prepare mortar can help reduce the high carbon dioxide emissions associated with ordinary Portland cement and alleviate the shortage of natural aggregates. However, the chloride ions present in sea sand can increase the risk of rebar corrosion. Compared with traditional cements, AACMs may offer superior chloride ion binding capacity. Alkali-activated slag/sea sand (AASS) mortars with varying alkali dosages were prepared in this study. First, the mechanical properties of the AASS mortars were tested. Subsequently, electrochemical methods, including chloride ion fixation and pH analysis, were used to evaluate the corrosion resistance of rebars. The results showed that an increase in alkali dosage enhanced both the pH and the chloride ion fixation capacity, improving the corrosion potential, reducing the corrosion current density and increasing the polarisation resistance. Electrochemical impedance spectroscopy tests indicated optimal corrosion resistance at a 6% alkali dosage, with the best rebar passivation at this level. Analysis of hydration products revealed how the increased alkali dosage boosted chloride ion fixation and rebar corrosion resistance. The results of this work provide a theoretical basis for the application of AASS mortar in construction.
Keyword ：
alkali-activated cements alkali-activated cements alkali-activated slag alkali-activated slag alkali equivalents alkali equivalents corrosion corrosion electrochemistry electrochemistry sea sand mortar sea sand mortar steel bars steel bars
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| GB/T 7714 | Wang, Jize , Kang, Sixiang , Song, Chenhao et al. The impact of alkali equivalent on the corrosion resistance of steel bars in alkali-activated slag/sea sand mortar [J]. | ADVANCES IN CEMENT RESEARCH , 2025 . |
| MLA | Wang, Jize et al. "The impact of alkali equivalent on the corrosion resistance of steel bars in alkali-activated slag/sea sand mortar" . | ADVANCES IN CEMENT RESEARCH (2025) . |
| APA | Wang, Jize , Kang, Sixiang , Song, Chenhao , Wu, Wenda , Lou, Ying , Xu, Liwei et al. The impact of alkali equivalent on the corrosion resistance of steel bars in alkali-activated slag/sea sand mortar . | ADVANCES IN CEMENT RESEARCH , 2025 . |
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The use of seawater and sea sand for the preparation of alkali-activated concretes plays an important role in reducing carbon emissions and alleviating resource scarcity. However, both alkali-activated concretes and products made from seawater and sea sand tend to exhibit significant drying shrinkage. Therefore, this study investigates the effect of the addition of seawater and sea sand on the basic properties and drying shrinkage properties of alkali-activated concretes, and regulates the properties of seawater and sea sand alkali-activated slag (SSAS) concretes with the key parameter of the alkali equivalent. Finally, the mechanism of SSAS drying shrinkage improvement was investigated using XRD, TG, MIP, and SEM. The results show that the addition of seawater and untreated sea sand accelerates the hydration reaction of alkali-excited cement and can significantly reduce its drying shrinkage. A moderate increase in alkali content can improve the compressive strength and reduce the drying shrinkage. However, an excessively high alkali content reduces the flexural strength. Finally, we propose the existence of a quantitative relationship between drying shrinkage, mass loss, and the evaporable water content, which better explains the mechanism of shrinkage variation. These effects are mainly attributed to changes in microstructure and phase composition. This study provides theoretical support for engineering applications of seawater-sea sand alkali-activated materials.
Keyword ：
alkali-activated concretes alkali-activated concretes alkali equivalent alkali equivalent drying shrinkage drying shrinkage sea sand sea sand seawater seawater
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| GB/T 7714 | Zhang, Jianbin , Kang, Sixiang , Shen, Yanran et al. Effects of Sand Type and Alkali Equivalent on Drying Shrinkage and Microstructure of Seawater-Sea Sand Alkali-Activated Slag Concrete [J]. | MATERIALS , 2025 , 18 (5) . |
| MLA | Zhang, Jianbin et al. "Effects of Sand Type and Alkali Equivalent on Drying Shrinkage and Microstructure of Seawater-Sea Sand Alkali-Activated Slag Concrete" . | MATERIALS 18 . 5 (2025) . |
| APA | Zhang, Jianbin , Kang, Sixiang , Shen, Yanran , Song, Chenhao , Lei, Haoliang , Xie, Wei et al. Effects of Sand Type and Alkali Equivalent on Drying Shrinkage and Microstructure of Seawater-Sea Sand Alkali-Activated Slag Concrete . | MATERIALS , 2025 , 18 (5) . |
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The efficient reuse of construction waste plays a vital role in fostering eco-friendly practices in the construction industry. However, the efficient application of recycled powder remains a significant challenge due to its low reactivity. In response to this issue, this study investigates the combination of recycled powder with slag to create a recycled powder-slag-based geopolymers (RPSG) through alkaline activation. To assess the performance of RPSG in erosion-prone environments, the effects of various sulfate types, concentrations, and erosion methods on its sulfate resistance were systematically evaluated. Advanced techniques, including SEM, XRD, FTIR, and MIP, were employed to analyze the microstructural changes. The results show that sulfate-induced expansive products initially improve, but eventually degrade, the performance of RPSG mortar. The stronger reactivity of Mg2 + causes decalcification, making the erosion effect of MgSO4 solution more severe. The wet-dry cycling process accelerates sulfate penetration during the wet phase, leading to faster generation of erosion products, while the crystallization of salts and shrinkage during the drying phase causes more significant degradation. These findings provide valuable theoretical insights for applying RPSG in sulfate-rich environments and serve as a practical reference for improving the durability design of geopolymer-based materials in engineering applications.
Keyword ：
Erosion mechanism Erosion mechanism Geopolymer Geopolymer Microstructure Microstructure Recycled powder Recycled powder Sulfate attack Sulfate attack
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| GB/T 7714 | Lou, Ying , Kang, Sixiang , Wu, Wenda et al. Sulfate resistance of recycled powder-slag-based geopolymers under different erosive environments [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 462 . |
| MLA | Lou, Ying et al. "Sulfate resistance of recycled powder-slag-based geopolymers under different erosive environments" . | CONSTRUCTION AND BUILDING MATERIALS 462 (2025) . |
| APA | Lou, Ying , Kang, Sixiang , Wu, Wenda , Wang, Xuefang , Sun, Huaqiang , Chen, Feng et al. Sulfate resistance of recycled powder-slag-based geopolymers under different erosive environments . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 462 . |
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Herein, the effects of the ionic types and content of alkali activator on the chloride-ion permeability of one-part alkali-activated nickel slag concrete were examined. The NT Build 492 method was adopted to measure the Cl- transport performance. In general, the total Cl- concentration in concrete decreases with the increase of penetration depth; however, the enrichment of Clconcentration in the sample is not obvious. Anions have more effect on 28-d compressive strength, while cations have more effect on chlorine-ion permeability. For the same Na2O content, SiO32- -activator and Na+-activator perform better than other anions and cations, while OH- and K+ perform worse than other ions. The chloride-ion permeability coefficient (DRCM) of concrete with Na2SiO3 is the lowest and that with KOH is the highest. The DRCM of concrete prepared with KOH is 1.93 times higher than that of concrete prepared with Na2SiO3. When the activator is Na2SiO3, the DRCM of concrete decreases with the increase in Na2O content when the Na2O content is less than 7%. However, when the Na2O content exceeds 7%, the DRCM of concrete increases with the increase in Na2O content.
Keyword ：
Alkali activator Alkali activator Chloride -ion ion permeability Chloride -ion ion permeability Ionic type Ionic type Na 2 O content Na 2 O content Nickel slag Nickel slag
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| GB/T 7714 | Wang, Xuefang , Lan, Qiaoling , Lin, Huanghua et al. Effects of alkali activator on the chloride-ion permeability of one-part alkali-activated nickel slag concrete [J]. | CASE STUDIES IN CONSTRUCTION MATERIALS , 2024 , 20 . |
| MLA | Wang, Xuefang et al. "Effects of alkali activator on the chloride-ion permeability of one-part alkali-activated nickel slag concrete" . | CASE STUDIES IN CONSTRUCTION MATERIALS 20 (2024) . |
| APA | Wang, Xuefang , Lan, Qiaoling , Lin, Huanghua , Wang, Yasi , Wu, Wenda , Xu, Liwei et al. Effects of alkali activator on the chloride-ion permeability of one-part alkali-activated nickel slag concrete . | CASE STUDIES IN CONSTRUCTION MATERIALS , 2024 , 20 . |
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Buildings in coastal areas have been suffered from seawater immersion and tidal erosion for a long time, and the resistance of building structures to sulfate erosion has always been a concern. In order to solve this problem, this paper attempts to develop a new low-carbon green geopolymer cementitious material that is resistant to sulfate attack. The effect of this geopolymer material on sulfate erosion resistance is investigated in terms of alkali admixture, alkali modulus, water-binder ratio and fly ash admixture. In this paper, the geopolymer materials were tested for sulfate erosion resistance by dry-wet cycle sulfate erosion mechanism. It was shown that the contribution in improving the resistance of geopolymer materials to MgSO4 attack can be ranked as follows: water-binder ratio > fly ash content > alkali content > alkali modulus; Increasing alkali admixture, water-binder ratio and fly ash admixture and decreasing alkali modulus will promote the generation of gypsum in the specimen; Mg2+ in MgSO4 solution makes the volcanic ash reaction products decalcify, and the free Ca2+ and [SO4](2-) combine to generate gypsum, causing gypsum-type erosion damage in the specimen.
Keyword ：
drying-wetting cycles drying-wetting cycles geopolymers geopolymers strength & testing of materials strength & testing of materials sulfate resistance sulfate resistance
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| GB/T 7714 | Lou, Ying , Ma, Shilong , Wang, Yuanda et al. Effect and evaluation of multi-factors on the performance of one-part geopolymer mortar against MgSO4 erosion [J]. | ADVANCES IN CEMENT RESEARCH , 2024 . |
| MLA | Lou, Ying et al. "Effect and evaluation of multi-factors on the performance of one-part geopolymer mortar against MgSO4 erosion" . | ADVANCES IN CEMENT RESEARCH (2024) . |
| APA | Lou, Ying , Ma, Shilong , Wang, Yuanda , Wu, Wenda , Wang, Xuefang . Effect and evaluation of multi-factors on the performance of one-part geopolymer mortar against MgSO4 erosion . | ADVANCES IN CEMENT RESEARCH , 2024 . |
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To address the significant carbon emissions caused by the cement industry and its contribution to the greenhouse effect, there is an urgent need for new construction materials that can substantially reduce the use of traditional Portland cement. Alkali-activated binders, known for their excellent performance and lower carbon footprint, have emerged as a promising alternative. Despite the numerous advantages of geopolymers, their practical application is hindered by challenges in processability required for construction techniques, such as pumping, spreading, and forming. This study focuses on enhancing the rheological properties of geopolymers through mechanochemical activation and exploring the modification mechanisms involved. Slag and fly ash raw materials were processed under different ball milling conditions, specifically varying ball milling rotation speed (BR) and ball milling time (BT). The mechanical properties, workability, and rheological behavior of geopolymer specimens were evaluated to identify the optimal milling parameters affecting these properties. Detailed analysis using XRD, SEM, and heat of hydration tests elucidated the phase composition, microstructural evolution, and thermal characteristics of mechanochemically modified geopolymers, providing insights into the fundamental mechanisms of mechanochemical activation modification. The results indicate a significant correlation between ball milling parameters and the rheological properties of geopolymers. The optimal milling regime was identified as grinding at a speed of 70r/min for 50 min. This specific milling condition imparts ideal properties to the geopolymer, including moderate yield stress (34.353 Pa), low plastic viscosity (0.452 Pa s), good thixotropy, and high 28d strength (53.28 MPa), without any significant shear thickening behavior.
Keyword ：
Ball milling rotation speed Ball milling rotation speed Ball milling time Ball milling time Geopolymer Geopolymer Mechanochemical activation Mechanochemical activation Rheological properties Rheological properties
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| GB/T 7714 | Kang, Sixiang , Wang, Jize , Hu, Cheng et al. The influence of mechanochemical activation on the rheological properties and strength development of geopolymer [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 96 . |
| MLA | Kang, Sixiang et al. "The influence of mechanochemical activation on the rheological properties and strength development of geopolymer" . | JOURNAL OF BUILDING ENGINEERING 96 (2024) . |
| APA | Kang, Sixiang , Wang, Jize , Hu, Cheng , Yao, Hongyu , Sun, Huaqiang , Wu, Wenda et al. The influence of mechanochemical activation on the rheological properties and strength development of geopolymer . | JOURNAL OF BUILDING ENGINEERING , 2024 , 96 . |
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To study the effects of ion type and dosage of alkali activators on the carbonation of one-part alkali-activated nickel slag (OAANS) mortar, NaOH, Na2SiO3, NaOH+Na2SiO3, KOH, and KOH+Na2CO3 were used as activators. The carbonation depth, compressive strength, and microstructure (via MIP, XRD, and FTIR) were analyzed. Results show that OAANS mortar with K+ as the cation has significantly lower carbonation resistance than those with Na+. Compressive strength with K+ decreases initially after carbonation, then increases, while strength with Na+ grows rapidly early and slows later. With the same cation, mortars with OH- exhibit higher strength than those with SiO32- after 28 days of carbonation. Increasing alkali dosage promotes hydration, reduces porosity, and enhances carbonation resistance, with effects depending on the alkali activator type.
Keyword ：
alkali-activated nickel slag cement alkali-activated nickel slag cement Alkali activator Alkali activator carbonation carbonation dosage dosage ion type ion type
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| GB/T 7714 | Wang, Xuefang , Que, Yuanhao , Wang, Shengxian et al. Effects of alkali activator on the carbonation of one-part alkali-activated nickel slag cement [J]. | JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS , 2024 , 14 (4) : 627-644 . |
| MLA | Wang, Xuefang et al. "Effects of alkali activator on the carbonation of one-part alkali-activated nickel slag cement" . | JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS 14 . 4 (2024) : 627-644 . |
| APA | Wang, Xuefang , Que, Yuanhao , Wang, Shengxian , Kang, Sixiang , Zheng, Wenquan , Xu, Liwei et al. Effects of alkali activator on the carbonation of one-part alkali-activated nickel slag cement . | JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS , 2024 , 14 (4) , 627-644 . |
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本实用新型涉及一种防粉残留、可自动收集粉体的新型球磨罐，包括内部中空且两端为敞口的球磨罐体，所述球磨罐体的一端口连接有罐盖，球磨罐体的另一端连接有粉体收集盒，所述罐盖内侧面中部安装有用于对球磨罐体的内壁吹气的吹气组件，所述吹气组件与压缩气体供给组件相连接；所述罐盖上设有排气阀门。本实用新型结构设计合理，在球磨结束后，利用喷气头朝球磨罐体的内壁吹气，利用压缩气体将球磨罐体内壁的残留粉体吹落，并掉落至粉体收集盒内，从而实现自动收集、清扫球磨罐壁残余粉体，使用方便，提高工作效率。
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| GB/T 7714 | 王雪芳 , 江汪正 , 吴文达 . 一种防粉残留、可自动收集粉体的新型球磨罐 : CN202221650780.0[P]. | 2022-06-30 00:00:00 . |
| MLA | 王雪芳 et al. "一种防粉残留、可自动收集粉体的新型球磨罐" : CN202221650780.0. | 2022-06-30 00:00:00 . |
| APA | 王雪芳 , 江汪正 , 吴文达 . 一种防粉残留、可自动收集粉体的新型球磨罐 : CN202221650780.0. | 2022-06-30 00:00:00 . |
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