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学者姓名：张冬
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在超高性能混凝土(UHPC)中采用饱和面干再生细骨料(RFA),不仅可减少UHPC收缩,还能节约成本.研究了相同净水胶比下饱和面干RFA掺量(0、50％和100％)对UHPC的电通量、抗压强度和碳化深度的影响,并通过分析UHPC的水化产物和孔结构揭示其机理.研究表明:随着饱和面干RFA掺量的增大,总水胶比增大,UHPC孔结构劣化,密实度降低,抗压强度降低,碳化深度增大.然而在相同碳化条件下,饱和面干RFA掺量为100％时,UHPC的碳化深度仍分别是普通混凝土和高性能混凝土的1/37.83～1/65.61和1/11.20～1/19.92.提出并验证了掺饱和面干RFA的UHPC碳化深度模型,为再生骨料UHPC推广及应用提供依据.
Keyword ：
微结构 微结构 抗碳化性能 抗碳化性能 超高性能混凝土 超高性能混凝土 饱和面干再生细骨料 饱和面干再生细骨料
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| GB/T 7714 | 赵伟 , 胡炎通 , 季韬 et al. 饱和面干再生细骨料对UHPC抗碳化性能的影响 [J]. | 混凝土 , 2025 , (1) : 125-128,133 . |
| MLA | 赵伟 et al. "饱和面干再生细骨料对UHPC抗碳化性能的影响" . | 混凝土 1 (2025) : 125-128,133 . |
| APA | 赵伟 , 胡炎通 , 季韬 , 张冬 . 饱和面干再生细骨料对UHPC抗碳化性能的影响 . | 混凝土 , 2025 , (1) , 125-128,133 . |
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With the development of marine infrastructure construction in recent years, the durability requirements of cement-based materials in marine environments have been increasingly raised. Ferroaluminate cement is the "third-generation cement" in China, which has excellent performance of resistance to seawater erosion. The purpose of this study was to explore the mechanical properties and microstructural changes of ferroaluminate cement concrete (FACC) and ordinary Portland cement concrete (OPCC) under the seawater dry-wet cycle, with particular attention to the influence of water-to-cement ratio on the properties. The physical and mechanical properties such as mass loss rate, relative dynamic elastic modulus and cube compressive strength of FACC and OPCC were compared and analyzed by experiments, and the microstructure was analyzed by scanning electron microscope and mercury intrusion method. The results show that during the seawater dry-wet cycle, FACC has a lower mass loss rate, and the relative dynamic elastic modulus of FACC increases at the beginning of the seawater dry-wet cycle and then tends to be stable, while relative dynamic elastic modulus of OPCC shows a significant decrease in the later stage of the seawater dry-wet cycle. In terms of compressive strength, FACC increases after seawater dry-wet cycle, while OPCC decreases. Overall, FACC demonstrates superior durability and stronger resistance to seawater erosion compared to OPCC. Microscopic analysis reveals that FACC has lower porosity and finer pore structure, which contributes to improve its durability. © (2025), (Bulletin of the Chinese Ceramic Society Press). All Rights Reserved.
Keyword ：
compressive strength compressive strength ferroaluminate cement ferroaluminate cement mass loss rate mass loss rate microscopic property microscopic property relative elastic modulus relative elastic modulus seawater dry-wet cycle seawater dry-wet cycle 微观性能 微观性能 抗压强度 抗压强度 海水干湿循环 海水干湿循环 相对弹性模量 相对弹性模量 质量损失率 质量损失率 铁铝酸盐水泥 铁铝酸盐水泥
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| GB/T 7714 | Zhang, P. , Qi, D. , Wang, X. et al. Mechanical and Microscopic Properties of Ferroaluminate Cement Concrete under Action of Seawater Dry-Wet Cycle; [海水干湿循环作用下铁铝酸盐水泥混凝土的 力学性能和微观性能研究] [J]. | Bulletin of the Chinese Ceramic Society , 2025 , 44 (7) : 2429-2436 . |
| MLA | Zhang, P. et al. "Mechanical and Microscopic Properties of Ferroaluminate Cement Concrete under Action of Seawater Dry-Wet Cycle; [海水干湿循环作用下铁铝酸盐水泥混凝土的 力学性能和微观性能研究]" . | Bulletin of the Chinese Ceramic Society 44 . 7 (2025) : 2429-2436 . |
| APA | Zhang, P. , Qi, D. , Wang, X. , Chen, H. , He, C. , Zhang, W. et al. Mechanical and Microscopic Properties of Ferroaluminate Cement Concrete under Action of Seawater Dry-Wet Cycle; [海水干湿循环作用下铁铝酸盐水泥混凝土的 力学性能和微观性能研究] . | Bulletin of the Chinese Ceramic Society , 2025 , 44 (7) , 2429-2436 . |
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It is common to precast the ultra-high-performance concrete (UHPC) arch rib segments and to assemble them through dry joints, while the shear behaviors of the dry joints are of great concern for the safety of the whole structure. In this paper, an experimental study on five dry joint specimens was carried out to investigate their shear behaviors, and to lay a foundation for further engineering applications of this bridge type.
Keyword ：
Dry joints Dry joints Experiment Experiment Shear behaviors Shear behaviors Ultra high-performance concrete (UHPC) Ultra high-performance concrete (UHPC)
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| GB/T 7714 | Zhou, Jialiang , Chen, Baochun , Su, Jiazhan et al. Experimental Study on Shear Behaviors of Dry Joints for UHPC Segments [J]. | PROCEEDINGS OF ARCH 2023, VOL 1 , 2025 , 33 : 341-349 . |
| MLA | Zhou, Jialiang et al. "Experimental Study on Shear Behaviors of Dry Joints for UHPC Segments" . | PROCEEDINGS OF ARCH 2023, VOL 1 33 (2025) : 341-349 . |
| APA | Zhou, Jialiang , Chen, Baochun , Su, Jiazhan , Zhang, Dong . Experimental Study on Shear Behaviors of Dry Joints for UHPC Segments . | PROCEEDINGS OF ARCH 2023, VOL 1 , 2025 , 33 , 341-349 . |
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To address the dual challenges of improving strength and reducing permeability in solidified soils produced from excavated waste mud, this study develops a sustainable stabilization method using industrial by-products. A ternary solid waste-based cementitious material (SWC), consisting of ground granulated blast furnace slag (GGBS), steel slag (SS), and desulfurization gypsum (DG), was optimized through an extreme vertex mixture design. The results demonstrate that, under appropriate mix proportions, the solidified soil using SWC can achieve comparable unconfined compressive strength (UCS) at 7 d and superior strength at 28 d compared to ordinary Portland cement (OPC). Specifically, the mixture containing 60 wt% GGBS, 30 wt% SS, and 10 wt% DG, referred to as G60S30D10, achieved a 28 d UCS of 3.22 MPa, representing an increase of approximately 105% over OPC, and a permeability coefficient of 1.94 × 10⁻⁸ m/s, an order of magnitude lower than that of OPC, which indicates excellent water resistance. Microstructural analysis, including X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, and mercury intrusion porosimetry, reveals that the primary hydration products in the SWC solidified soil include ettringite (AFt), C-S-H, C-A-H, and C-A-S-H. Compared to OPC, the AFt content increased by 22–83%, and the combined action of expansive AFt crystals and dense C-(A)-S-H gels effectively fill interconnected pores, leading to a substantial reduction in detrimental macropores (> 1 μm) from 15% in OPC to 2–3% in the SWC matrix. This refined pore structure substantially contributed to the observed reduction in permeability. These findings offer valuable insights into the performance and mechanisms of low-carbon, high-efficiency solidified soils using industrial by-products. © The Author(s) 2025.
Keyword ：
Abandoned soil Abandoned soil Chemical stabilization Chemical stabilization Industrial waste Industrial waste Microstructure characteristics Microstructure characteristics Permeability Permeability
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| GB/T 7714 | Deng, J. , Zhang, D. , Yuan, H. et al. Strength and permeability performance of excavated waste mud stabilized with ternary industrial byproducts [J]. | Scientific Reports , 2025 , 15 (1) . |
| MLA | Deng, J. et al. "Strength and permeability performance of excavated waste mud stabilized with ternary industrial byproducts" . | Scientific Reports 15 . 1 (2025) . |
| APA | Deng, J. , Zhang, D. , Yuan, H. , Gu, L. , Zhang, X. , Han, S. . Strength and permeability performance of excavated waste mud stabilized with ternary industrial byproducts . | Scientific Reports , 2025 , 15 (1) . |
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This study reported the preparation of a visible-light-responsive polymer carbon nitride carbonized coating (VLPCNC) using gamma-C2S and photo-responsive polymer carbon nitride (PCN), primarily designed for air purification. The effects of varying PCN content on the photocatalytic properties, bonding strength, and erosion resistance of VLPCNC were investigated, with the mechanism analyzed through a series of microscopic techniques. Results demonstrated that VLPCNC with PCN displayed excellent photocatalytic efficiency under visible light. A rise in PCN content from 10 % to 50 % led to a substantial enhancement in the NO removal rate, increasing from 287.5 mu mol center dot m-2 center dot h-1 (14.7 %) to 720.9 mu mol center dot m-2 center dot h-1 (44.1 %). Incorporating 10 % of PCN could improve the bond strength of VLPCNC with concrete substrate. PCN could act as nucleation sites that enhance the carbonation of gamma-C2S, thus improving the bonding. However, a high PCN content significantly weakened the bond, as the dilution effect lowered the concentration of carbonation products in the binder. The NO removal performance of VLPCNC with 10 % PCN only reduced by 5.8 % after 1 d scouring treatment and the reduction increased when PCN content increased. All of the VLPCNC could remain good photocatalytic properties after 7 d scouring. The PCN particles were partially encapsulated by calcium carbonate crystals and adhered to their surface, enhancing the anti-scouring performance of VLPCNC. Notably, VLPCNC-10 exhibited a balance of exceptional photocatalytic properties, mechanical strength, and durability.
Keyword ：
Bonding performance, CaCO3 Bonding performance, CaCO3 gamma-C2S gamma-C2S NOx degradation NOx degradation PCN PCN
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| GB/T 7714 | Zhang, Dian , Zhou, Jitai , Su, Wenyue et al. A novel visible-light-responsive polymer carbon nitride carbonized coating: NOx degradation and bonding performance [J]. | SURFACES AND INTERFACES , 2025 , 68 . |
| MLA | Zhang, Dian et al. "A novel visible-light-responsive polymer carbon nitride carbonized coating: NOx degradation and bonding performance" . | SURFACES AND INTERFACES 68 (2025) . |
| APA | Zhang, Dian , Zhou, Jitai , Su, Wenyue , Weng, Yiwei , Zhang, Dong , Ji, Tao . A novel visible-light-responsive polymer carbon nitride carbonized coating: NOx degradation and bonding performance . | SURFACES AND INTERFACES , 2025 , 68 . |
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This study developed a size-dependent model to predict the flexural strength of 3D printed engineered cementitious composites (ECC) beams with different beam spans. The proposed model relates the flexural strength of printed ECC beams to beam spans based on a stochastic tensile constitutive model of ECC, by taking the size effect into account. ECC beams with four spans (240 mm, 300 mm, 450 mm, and 1500 mm) were printed and tested by four-point bending. The results showed that the size-dependent model can predict the flexural strength with an approximate accuracy of 90%. Compared to the size-independent model, the proposed size-dependent model improved the prediction accuracy by approximately 27%. The force analysis of the shear strength of interlayers further revealed that interfacial bonding has a negligible impact on the simulated flexural strength. Consequently, the developed size-dependent model can potentially guide the structural design of 3D printed ECC beams.
Keyword ：
3D concrete printing 3D concrete printing Engineered cementitious composites Engineered cementitious composites Flexural strength Flexural strength Size-dependent model Size-dependent model Size effect Size effect
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| GB/T 7714 | Yu, Jie , Teng, Fei , Ye, Junhong et al. Size-dependent model to predict the flexural strength of 3D printed engineered cementitious composites beams [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 462 . |
| MLA | Yu, Jie et al. "Size-dependent model to predict the flexural strength of 3D printed engineered cementitious composites beams" . | CONSTRUCTION AND BUILDING MATERIALS 462 (2025) . |
| APA | Yu, Jie , Teng, Fei , Ye, Junhong , Zhang, Dong , Yu, Kequan , Yu, Jiangtao et al. Size-dependent model to predict the flexural strength of 3D printed engineered cementitious composites beams . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 462 . |
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Producing steel slag (SS) bricks using carbonation technology holds significant potential for improving the utilization of SS, as carbonation enhances both the mechanical strength and CO2 sequestration capacity. This study uses Response Surface Methodology (RSM) to investigate the effects of water-to-binder ratio (w/b), binderto-sand ratio (b/s), and molding pressure on the compressive strength of carbonated SS bricks. The optimal mix design was determined through predictive modeling, and characterization techniques such as Mercury Intrusion Porosimetry (MIP), X-ray Diffraction (XRD), and Thermogravimetric Analysis (TGA) were employed to analyze the pore structure, mineral composition, and microstructure. A Life Cycle Assessment (LCA) was conducted to evaluate the environmental impact of the process. The RSM analysis revealed that both w/b and b/s ratios significantly influenced the carbonation of SS bricks, while the effect of molding pressure was less pronounced. The predictive model suggested that the optimal compressive strength of 36.53 MPa is achieved with a w/b of 0.19 and a b/s ratio of 2.25, which closely matches the experimentally measured strength of 36.88 MPa. The results indicate that SS paste samples and those with low b/s ratios negatively affect both the carbonation efficiency and mechanical performance of SS bricks. Specifically, SS paste bricks inhibit CO2 diffusion due to the formation of calcite on the surface, while samples with low b/s ratios exhibit excessive porosity and a loose structure. TGA results showed that WB20 and BS53 samples contained higher calcite contents, at 6.21 % and 4.53 %, respectively. The LCA of WB20 revealed that its carbon footprint (kg center dot CO2 center dot eq) is 81.41 % lower than that of concrete bricks and 85.02 % lower than that of fired shale bricks. The Global Warming Potential (GWP) of WB20 was also significantly lower, showing reductions of 84.61 %, 115.7 %, and 112.7 % compared to its own CO2 emissions, concrete bricks, and fired shale bricks, respectively. This study provides a valuable reference for the feasibility of producing carbonated SS bricks, offering optimal mix parameters through RSM and demonstrating the superior physical properties of carbonated SS bricks. The LCA comparison with conventional concrete and fired shale bricks confirms that carbonated SS bricks are a promising carbon-negative building material.
Keyword ：
Carbonated steel slag brick Carbonated steel slag brick Carbonation Carbonation Compressive strength Compressive strength Life cycle assessment Life cycle assessment Porosity Porosity Soundness Soundness
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| GB/T 7714 | Zhang, Xiaoxiang , Zhang, Dong , Wang, Peng et al. Optimizing the properties of carbonated steel slag brick based on response surface method (RSM) [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 473 . |
| MLA | Zhang, Xiaoxiang et al. "Optimizing the properties of carbonated steel slag brick based on response surface method (RSM)" . | CONSTRUCTION AND BUILDING MATERIALS 473 (2025) . |
| APA | Zhang, Xiaoxiang , Zhang, Dong , Wang, Peng , Deng, Jiaxin , Gu, Lei , Yuan, Huihui . Optimizing the properties of carbonated steel slag brick based on response surface method (RSM) . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 473 . |
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Flexural size effect, originating from the fracture characteristics of materials, is a common phenomenon in concrete. Conventionally, time-consuming and labor-intensive experiments are required to investigate the flexural size effect and fracture behaviors of concrete. To tackle the limitations, a data-driven approach was adopted to predict the multifactor-influenced flexural size effect and fracture behaviors of concrete by gene expression programming (GEP) due to its capability of addressing non-linear problems and developing empirical equations with multiple input variables. Results show that the GEP models can accurately predict nominal flexural strength (R2, 0.890) and fracture toughness (R2, 0.946). Parametric analysis reveals that the compressive strength and tensile strain capacity positively impact the nominal flexural strength and fracture toughness of concrete. Based on the GEP model, a multifactor-influenced size effect law (SEL) is proposed to predict the nominal flexural strength by incorporating both material and geometric parameters, removing the need for extensive experimental investigations. The findings provide generalized models to predict the nominal flexural strength and fracture toughness of various materials at different sizes.
Keyword ：
Flexural strength Flexural strength Fracture toughness Fracture toughness Gene expression programming Gene expression programming Machine learning Machine learning Size effect Size effect
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| GB/T 7714 | Ye, Junhong , Uddin, Md Nasir , Yu, Jie et al. A data-driven approach to predicting multifactor-influenced flexural size effect and fracture behaviors of concrete [J]. | ENGINEERING FRACTURE MECHANICS , 2025 , 315 . |
| MLA | Ye, Junhong et al. "A data-driven approach to predicting multifactor-influenced flexural size effect and fracture behaviors of concrete" . | ENGINEERING FRACTURE MECHANICS 315 (2025) . |
| APA | Ye, Junhong , Uddin, Md Nasir , Yu, Jie , Xu, Tengfei , Zhan, Yulin , Zhang, Dong et al. A data-driven approach to predicting multifactor-influenced flexural size effect and fracture behaviors of concrete . | ENGINEERING FRACTURE MECHANICS , 2025 , 315 . |
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Traditional carbonation methods for steel slag typically rely on pure CO2 and elevated pressures, posing practical challenges due to specific CO2 transport and kinetic limitations. This study explores the carbonation properties of steel slag blocks under ambient conditions using a 30 % CO2 concentration. To accelerate carbonation, the effectiveness of various chemical additives was examined, including chelating agents, inorganic alkali activators, and sulfates. Results demonstrate that incorporating chemical additives, particularly EDTA and its salt derivatives, significantly increases the compressive strength of carbonated steel slag blocks. All tested chemicals facilitated increases in CO2 absorption. Specifically, Na2SO4 and Na2CO3 increased CO2 uptake by 30.6 % and 25.6 % at 12 h, respectively. A logarithmic model effectively characterized the CO2 uptake kinetics, revealing that initial CO2 uptake (beta) usually correlates inversely with the carbonation rate (alpha) over time. Na2CO3 and Na2SO4 exhibited faster carbonation kinetics throughout the process due to the accelerated formation of C-(A)-S-H structures that are more reactive to CO2 than the original mineral phases. However, excessive carbonation rates resulted in the formation of a dense carbonate layer on the block surfaces, limiting further CO2 diffusion. These findings underscore the potential of chemical additives to optimize the carbonation process, contributing to eco-friendly, high-performance building materials.
Keyword ：
Accelerated carbonation Accelerated carbonation Chelating agents Chelating agents Chemical additives Chemical additives Compressive strength Compressive strength Steel slag Steel slag
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| GB/T 7714 | Deng, Jiaxin , Zhang, Dong , Gu, Lei et al. Enhanced carbonation of steel slag blocks using various chemical additives [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 . |
| MLA | Deng, Jiaxin et al. "Enhanced carbonation of steel slag blocks using various chemical additives" . | JOURNAL OF BUILDING ENGINEERING 105 (2025) . |
| APA | Deng, Jiaxin , Zhang, Dong , Gu, Lei , Yuan, Huihui , Zhang, Xiaoxiang . Enhanced carbonation of steel slag blocks using various chemical additives . | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 . |
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The cracking of double-block ballastless track slab concrete has become a critical issue, which can be mitigated through the use of low-heat Portland cement (LC), a MgO-based expansive agent (ME), and a shrinkage-reducing admixture (SR). However, the combined effects of these three components on shrinkage cracking of concrete have not yet been studied. In this paper, the drying shrinkage deformation, cracking risk index (eta), and microstructure of ordinary concrete and LC concrete with different contents of ME and SR are systematically studied. The findings indicate that LC decreases the cracking risk of concrete by approximately 38.7 % compared to ordinary Portland cement (PC). By generating expansion crystals and reducing the surface tension of pore solution, both ME and SR can further inhibit the shrinkage of LC, thereby improving the crack resistance of LC-concrete. A significant synergistic shrinkage reduction effect of ME (8 %) and SR (2 %) on LC-concrete is demonstrated, reducing the cracking risk by around 51.04 %. The combined use of SR and ME promotes the formation of more elongated brucite crystals, enhancing particle interaction and improving the cracking resistance of LC. These findings offer essential insights for designing concrete with high crack resistance, ensuring that the cracking risk index remains below the acceptable threshold.
Keyword ：
Concrete for track slab Concrete for track slab Cracking risk Cracking risk Low-heat cement Low-heat cement Magnesium oxide expansion agent Magnesium oxide expansion agent Shrinkage reducing agent Shrinkage reducing agent
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| GB/T 7714 | Fang, Lei , Fu, Dabao , Yuan, Qiang et al. Combined effects of low-heat cement, expansive agent and shrinkage-reducing admixture on drying shrinkage and cracking of concrete [J]. | CASE STUDIES IN CONSTRUCTION MATERIALS , 2025 , 22 . |
| MLA | Fang, Lei et al. "Combined effects of low-heat cement, expansive agent and shrinkage-reducing admixture on drying shrinkage and cracking of concrete" . | CASE STUDIES IN CONSTRUCTION MATERIALS 22 (2025) . |
| APA | Fang, Lei , Fu, Dabao , Yuan, Qiang , Xu, Song , Zhang, Dong , Cai, Huangyi et al. Combined effects of low-heat cement, expansive agent and shrinkage-reducing admixture on drying shrinkage and cracking of concrete . | CASE STUDIES IN CONSTRUCTION MATERIALS , 2025 , 22 . |
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