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学者姓名：张鸿儒
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Abstract ：
The poor water resistance has long limited the widespread application of magnesium phosphate cement (MPC). This study utilized the high-alkaline of the MgO-SiO2-K2HPO4 system to activate slag and incorporated prewater-saturated pottery sand to prepare a water-resistant magnesium-based cement (SP-MSPC). The research primarily examined the effect of pottery sand on the water resistance and microstructure of SP-MSPC with different slag substitution rates. The results indicated that an increase in pottery sand content prolonged the setting time and reduced the fluidity of the paste. The incorporation of higher amounts of pottery sand decreased the mechanical properties of the matrix, but the addition of pottery sand effectively promoted paste hydration, particularly slag hydration, significantly enhancing the water resistance of the matrix. The water resistance coefficient of the S20-P6 matrix at 56 days was 72.42 %, a 61.86 % increase compared to the control group S0P0. This can be attributed to the internal curing effect of the pottery sand, which promotes paste hydration and the continuous formation of K-struvite crystals and the water-resistant M-S-H and C-(A)-S-H gels. The crystal and gel phases were bonded to each other and work synergistically with the dense filling effect of ultrafine slag particles, effectively filling the matrix pores and microcracks, blocking moisture transport channels, slowing the penetration of external moisture, and reducing the dissolution of K-struvite crystals and other hydration products aqueous environments. The incorporation of pottery sand promoted slag hydration enhanced the average polymerization degree of the C-(A)-S-H gel, and reduced the volume of macropores within the matrix.
Keyword ：
MgO-SiO 2-K 2 HPO 4 system MgO-SiO 2-K 2 HPO 4 system Microstructure Microstructure Pre-water-saturated pottery sand Pre-water-saturated pottery sand Slag Slag Water resistance Water resistance
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| GB/T 7714 | Yao, Pengpeng , Lin, Xujian , Wu, Yuzhong et al. Understanding the effect of pre-water-saturated pottery sand on the microstructure and water resistance of the slag-blended MgO-SiO2-K2HPO4 system [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 473 . |
| MLA | Yao, Pengpeng et al. "Understanding the effect of pre-water-saturated pottery sand on the microstructure and water resistance of the slag-blended MgO-SiO2-K2HPO4 system" . | CONSTRUCTION AND BUILDING MATERIALS 473 (2025) . |
| APA | Yao, Pengpeng , Lin, Xujian , Wu, Yuzhong , Ji, Tao , Liang, Yongning , Zhang, Hongru . Understanding the effect of pre-water-saturated pottery sand on the microstructure and water resistance of the slag-blended MgO-SiO2-K2HPO4 system . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 473 . |
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用四种不同性能的再生骨料制备了无机人造石,研究了再生骨料性能对无机人造石板试件力学性能的影响,并分析了微观机理.结果表明:由四种不同性能再生骨料制备而成的无机人造石板试件的力学性能优良,压缩强度和抗弯强度均满足相关标准要求;再生骨料的微粉含量和吸水率过高会降低无机人造石板试件的力学性能,削弱无机人造石界面过渡区及浆体的显微硬度;随着压碎指标的增大,无机人造石板试件的力学性能基本先增后降.
Keyword ：
再生骨料 再生骨料 力学性能 力学性能 压碎指标 压碎指标 吸水率 吸水率 微粉含量 微粉含量 无机人造石 无机人造石 显微硬度 显微硬度
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| GB/T 7714 | 姚杰 , 徐鑫 , 邹长根 et al. 再生骨料对水泥基无机人造石性能的影响 [J]. | 混凝土与水泥制品 , 2025 , (3) : 106-110 . |
| MLA | 姚杰 et al. "再生骨料对水泥基无机人造石性能的影响" . | 混凝土与水泥制品 3 (2025) : 106-110 . |
| APA | 姚杰 , 徐鑫 , 邹长根 , 张鸿儒 , 易世帆 , 曾正祥 . 再生骨料对水泥基无机人造石性能的影响 . | 混凝土与水泥制品 , 2025 , (3) , 106-110 . |
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The performance and durability of recycled aggregate concrete (RAC) are significantly impacted by the saturation degree of recycled coarse aggregate (RCA). This study examines RCA prewetting strategies and their effects on RAC's microstructure and performance under two water control strategies: consistent mixing water supply and consistent total water supply. Key findings show that RCA pre-wetting markedly influences cement hydration, altering RAC's microstructure in both scenarios. Under consistent mixing water supply, increased moisture in RCA enhances cement hydration but raises porosity in the interfacial transition zone (ITZ) and mortar by up to 28 % and 51.22 %, leading to reduced microhardness and mechanical performance, despite an enhanced concrete slump by up to 38.46 %. Conversely, with a consistent total water supply, although hydration is less complete, this method yields lower porosity in the ITZ and mortar (up to 23.03 % and 23.53 % reductions), improving microhardness, mechanical performance, and reducing the chloride diffusivity. Optimal performance is observed with partially saturated RCA (around 80 %) in this scenario, under which the compressive and flexural strength are 10.4 % and 7.35 % higher while the rapid chloride ion diffusion coefficient 7.32 % lower than the reference. The study further highlights that RCA pre-wetting impacts RAC's microstructure more significantly under consistent mixing water supply compared to total water supply, though differences diminish over time. A refined water absorption/desorption model for RCA is introduced, providing insights into how different water supply schemes affect RCA's water absorption and desorption behavior across varying initial saturation levels. This research underscores the need to tailor RCA pre-wetting techniques to optimize RAC performance under different water management strategies and suggests areas for future study on the detailed moisture release timing of RCA.
Keyword ：
Interfacial transition zone Interfacial transition zone Microstructure Microstructure Pre-wetting Pre-wetting Recycled aggregates Recycled aggregates Water absorption and desorption Water absorption and desorption
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| GB/T 7714 | Zhang, Hongru , Yi, Shifan , Xu, Xin et al. New insights into impacts of pre-wetting strategies of recycled coarse aggregate (RCA) on microstructure and performance of concrete [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 99 . |
| MLA | Zhang, Hongru et al. "New insights into impacts of pre-wetting strategies of recycled coarse aggregate (RCA) on microstructure and performance of concrete" . | JOURNAL OF BUILDING ENGINEERING 99 (2025) . |
| APA | Zhang, Hongru , Yi, Shifan , Xu, Xin , Yao, Jie . New insights into impacts of pre-wetting strategies of recycled coarse aggregate (RCA) on microstructure and performance of concrete . | JOURNAL OF BUILDING ENGINEERING , 2025 , 99 . |
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This study investigates the efficacy of graphitic carbon nitride (g-C3N4) as a photocatalyst for nitrogen oxides (NOx) removal and air purification on recycled aggregate pervious concrete (RAPC) pavement surfaces. Three gC3N4 variants (CN-U, CN-M1, and CN-M2), synthesized from different precursors and exhibiting unique structural and optical properties, were evaluated for their bonding stability on RAPC through degradation assessments, specifically examining the decomposition of rhodamine B (RhB) dye and the removal rate of NOx under simulated conditions reflective of actual road environments. The study emphasizes the importance of optimal photocatalyst loading time, identifying 6 h post-substrate casting as the ideal for balancing adhesion strength and preventing surface slurry leaking issues. After pavement surface wear and high-temperature rinsing tests, the CNU samples coated after 6 h of casting showed the highest NOx removal rates of 23.8 % and 24.6 %, respectively. Degradation tests revealed minimal g-C3N4 peeling under simulated road wear but significant detachment under conditions mimicking summer rainstorms and high temperatures, highlighting environmental challenges to longterm air purification effectiveness for RAPC pavement loaded with g-C3N4. Among the g-C3N4 variants, CN-U emerged as the most suitable for practical road applications, considering cost, photocatalytic efficiency, and bonding stability, with CN-M1 as a viable alternative. In contrast, CN-M2 was deemed less suitable due to higher costs and reduced environmental resilience. This research offers insights into developing durable, effective photocatalytic RAPC pavement materials for use in harsh climatic conditions, advancing functional pavement material technology.
Keyword ：
Bonding stability Bonding stability Pervious concrete pavement Pervious concrete pavement Photocatalyst Photocatalyst Recycled aggregates Recycled aggregates
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| GB/T 7714 | Pan, Xiaowen , Zhang, Hongru , Liu, Wenshen et al. Graphitic carbon nitride (g-C3N4) bonding stability on recycled aggregate pervious concrete (RAPC) pavement for enhanced long-term photocatalytic efficacy [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 470 . |
| MLA | Pan, Xiaowen et al. "Graphitic carbon nitride (g-C3N4) bonding stability on recycled aggregate pervious concrete (RAPC) pavement for enhanced long-term photocatalytic efficacy" . | CONSTRUCTION AND BUILDING MATERIALS 470 (2025) . |
| APA | Pan, Xiaowen , Zhang, Hongru , Liu, Wenshen , Yao, Jie . Graphitic carbon nitride (g-C3N4) bonding stability on recycled aggregate pervious concrete (RAPC) pavement for enhanced long-term photocatalytic efficacy . | CONSTRUCTION AND BUILDING MATERIALS , 2025 , 470 . |
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The use of recycled aggregate concrete (RAC) in engineering structures is a cornerstone of sustainable development within the construction industry. Nonetheless, the intricate microstructural characteristics of RAC, such as the prevalence of multiple mortars and the complex nature of the interfacial transition zones (ITZ), pose significant challenges to understanding the corrosion features of steel reinforcement, especially under chloride ion attack. Based on this, the present study investigates the corrosion behavior of rebar in RAC subjected to admixed chloride ion contamination, with a focus on the effects of different water-to-cement (w/c) ratios and varying levels of recycled aggregate replacement rate, denoted as φRA. Electrochemical methods were employed to macroscopically assess the corrosion process of the specimens. The results indicate that as the w/c ratio and φRA increase, rebar corrosion occurs earlier and the corrosion rate accelerates. Furthermore, microscopic testing methods were used to provide a detailed description of rebar corrosion behavior in RAC. The findings show that with increasing w/c ratio and φRA, the rust-filled area significantly enlarges, while the corrosion layer thickness remains relatively stable. The porosity of the surrounding concrete matrix is identified as the primary factor influencing the development of the rust filling, which suggests the potential for mitigating rust expansion cracks in RAC than conventional concrete. The impact of the microstructural characteristics of the multiple ITZ and mortar phases in RAC on rust filling behavior depends on the relative compactness of each material phase, as reflected by their pore structure features and microhardness. Although the new mortar phase serves as the main rust-filled area in RAC, accounting for 72 %-87 %, the rust filling sites provided by the interfacial transition zone should not be overlooked, due to the rust-filled preference induced by its high porosity. © 2025 Elsevier Ltd
Keyword ：
Concrete industry Concrete industry Corrosion rate Corrosion rate Corrosive effects Corrosive effects Steel corrosion Steel corrosion
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| GB/T 7714 | Zhang, Hongru , Tang, Huilin , Yang, Zijun et al. Chloride-induced reinforcement corrosion and rust filling in recycled aggregate concrete [J]. | Construction and Building Materials , 2025 , 486 . |
| MLA | Zhang, Hongru et al. "Chloride-induced reinforcement corrosion and rust filling in recycled aggregate concrete" . | Construction and Building Materials 486 (2025) . |
| APA | Zhang, Hongru , Tang, Huilin , Yang, Zijun , Gong, Fuyuan . Chloride-induced reinforcement corrosion and rust filling in recycled aggregate concrete . | Construction and Building Materials , 2025 , 486 . |
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Recycled aggregate concrete (RAC) comprises complex meso-scale material phases, including virgin aggregate, multiple interfacial transition zones (ITZs), and both old and new mortars. The performance of RAC is significantly influenced by the relative quality and quantity of these phases. This study investigated the effects of varying volume fractions of recycled aggregate (VRA, 20 %–44 %) and water-to-cement ratios (w/c, 0.4 to 0.6) on the mechanical properties, failure modes, and durability of RAC, with a focus on identifying and analyzing the 'weaker phases' and their quantity fractions changes. The results indicated that increasing the VRA improved the gradation of virgin aggregate, leading to a more complete stone-to-stone skeleton in RAC, thereby enhancing its compressive strength. However, since the skeleton had limited tensile stress transfer capacity, and increasing the VRA raised the relative quantity of ITZs (by up to 91.2 %), the splitting tensile strength decreased at 44 % VRA. In terms of durability, although increasing VRA led to a larger quantity of ITZs, the higher volume fraction of virgin aggregate exerted a more significant dilution and tortuosity effect on ion transport, resulting in reductions of 59.0 % in electrical flux and 39.8 % in sulfate diffusion coefficient as VRA increased from 20 % to 44 %. Increasing the w/c significantly reduced the microhardness of the new mortar and new ITZs, while old mortar and old ITZs remained relatively unaffected. When the w/c increased from 0.4 to 0.6, the weaker phase transitioned from being solely old ITZ to all three types of ITZs, with the microhardness of new mortar falling below that of old mortar. This led to increases in the relative quantities of the weaker ITZ phases and mortar phase, resulting in a notable decline in both mechanical performance and ion permeability. Specifically, the electrical flux of RAC at a w/c of 0.6 increased by 75.1 %–103.1 % compared to RAC at a w/c of 0.4, while the diffusion coefficient of sulfate ions was 0.90–7.64 times higher. Furthermore, the ITZ between virgin aggregate and old mortar exhibited the most severe microhardness degradation under sulfate attack and the highest sensitivity to sulfate concentration. These findings provide valuable insights into the meso-scale mechanisms governing RAC performance and offer guidance for optimizing material design to enhance the mechanical and durability properties of RAC in practical applications. © 2025 Elsevier Ltd
Keyword ：
Brinell Hardness Brinell Hardness Compressive strength Compressive strength Concrete aggregates Concrete aggregates Microhardness Microhardness Tenacity Tenacity Tensile strength Tensile strength
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| GB/T 7714 | Wang, Yuanda , Zhang, Hongru , Su, Weiwei et al. Towards better understanding of the mechanical properties and durability of recycled aggregate concrete based on the multiple meso-scale material phase analysis [J]. | Journal of Building Engineering , 2025 , 108 . |
| MLA | Wang, Yuanda et al. "Towards better understanding of the mechanical properties and durability of recycled aggregate concrete based on the multiple meso-scale material phase analysis" . | Journal of Building Engineering 108 (2025) . |
| APA | Wang, Yuanda , Zhang, Hongru , Su, Weiwei , Liu, Fujiang . Towards better understanding of the mechanical properties and durability of recycled aggregate concrete based on the multiple meso-scale material phase analysis . | Journal of Building Engineering , 2025 , 108 . |
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Foam concrete is widely used in the construction industry due to its low weight,good sound insulation,heat insulation,and seismic performance. Traditional foam concrete uses cement as the binder,which results in high carbon emissions. To reduce carbon emissions,municipal solid waste incineration bottom ash (MIBA)is partially used to replace cement to prepare MIBA foam concrete (MIBAFC). Based on the optimal foaming agent,alkali-activated technology is further used to improve the performance of foam concrete. The effects of different types of activators on the mechanical properties,water absorption rate,and drying shrinkage of MIBAFC were studied,and the microstructure and hydration characteristics of alkali-activated MIBAFC were tested using BSE,SEM,TG-DTG,and XRD. The results show that CaO+Na2 CO3(CN),NaOH (NH),water glass+K2 CO3(SK),and water glass (NS)can all undergo polymerization reaction with the active components such as SiO2 and Al2 O3 in MIBA,which improves the degree of hydration reaction and the pore structure of the hardened slurry. This significantly improves the setting time,water absorption rate,mechanical properties,and drying shrinkage of MIBAFC. Among the four activators,NS has the best overall modification effect,while CN has no significant effect. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
Keyword ：
Ashes Ashes Cements Cements Electric towers Electric towers Municipal solid waste Municipal solid waste Shotcreting Shotcreting Silicones Silicones
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| GB/T 7714 | Zhang, Cuirong , Zhang, Hongru , Jiang, Junjie et al. Investigation on Preparation and Performance of Alkali-activated Municipal Waste Incineration Bottom Ash (MIBA)Foam Concrete [J]. | Materials Reports , 2024 , 38 (22) . |
| MLA | Zhang, Cuirong et al. "Investigation on Preparation and Performance of Alkali-activated Municipal Waste Incineration Bottom Ash (MIBA)Foam Concrete" . | Materials Reports 38 . 22 (2024) . |
| APA | Zhang, Cuirong , Zhang, Hongru , Jiang, Junjie , Yi, Shifan . Investigation on Preparation and Performance of Alkali-activated Municipal Waste Incineration Bottom Ash (MIBA)Foam Concrete . | Materials Reports , 2024 , 38 (22) . |
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采用硅藻土部分取代水泥制备再生骨料混凝土(RAC),研究硅藻土内掺法对RAC抗离子(氯离子、硫酸根离子)侵蚀性能的改善效果及机理.试验结果表明,硅藻土可在水泥水化进程中发挥成核效应和火山灰效应,促进水泥水化,并改善界面过渡区水化产物结构,使界面过渡区更致密、厚度减小,使新砂浆水泥基体孔结构细化、大孔减少,从而减少RAC中离子侵蚀通道,减缓氯离子、硫酸根离子在RAC中的浓度积累.内掺硅藻土还提升了RAC细观尺度上各材料相(新、老砂浆及新界面过渡区)的显微硬度,减缓各材料相在硫酸根离子侵蚀下的性能劣化,从而使宏观尺度上RAC在硫酸盐侵蚀下力学性能劣化速度和程度显著降低.
Keyword ：
再生骨料混凝土 再生骨料混凝土 界面过渡区 界面过渡区 硅藻土 硅藻土 离子侵蚀 离子侵蚀
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| GB/T 7714 | 赵亚婉 , 张鸿儒 , 张宝明 et al. 硅藻土改性再生骨料混凝土的抗离子侵蚀性能 [J]. | 混凝土 , 2024 , (7) : 141-148 . |
| MLA | 赵亚婉 et al. "硅藻土改性再生骨料混凝土的抗离子侵蚀性能" . | 混凝土 7 (2024) : 141-148 . |
| APA | 赵亚婉 , 张鸿儒 , 张宝明 , 何炳坚 , 白银战 . 硅藻土改性再生骨料混凝土的抗离子侵蚀性能 . | 混凝土 , 2024 , (7) , 141-148 . |
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As the demand for alkali-activated cementitious materials (AACM) increases, reliance on blast furnace slag (BFS) raises concerns about potential shortages. This study evaluates the substitution of BFS with diatomaceous earth (DE) in AACM, using three DE types-raw (RDE), calcined (CDE), and spent (SDE)-at substitution rates of 0-30 %. The impact of these substitutions on fluidity, setting time, and compressive/flexural strength of the prepared mortar was assessed, along with an analysis of the mechanisms through hydration heat, product composition, and pore structure. Results indicate that DE, characterized by the porous structure and high content of amorphous silica, enhances early hydration, reduces fluidity, accelerates setting times, and refines pore structure, thereby improving strength. CDE, with its low organic content and large surface area, exhibited the best performance, while SDE was effective despite impurities, and RDE performed the poorest. Increasing DE substitution raised water absorption, impacting fluidity and setting times, with 20% identified as the optimal substitution rate, balancing strength and workability. The entropy method-analytic hierarchy process (EM-AHP) confirmed this rate, with CDE as the optimal variant. Life cycle assessment (LCA) showed that while SDE reduces environmental impacts significantly, CDE achieves a greater reduction when considering both environmental and mechanical performance. In conclusion, CDE and SDE are viable BFS substitutes in AACM, offering enhanced performance and reduced environmental impacts.
Keyword ：
Alkali-activated cementitious materials Alkali-activated cementitious materials Blast furnace slag Blast furnace slag Diatomaceous earth Diatomaceous earth Entropy method-analytic hierarchy process Entropy method-analytic hierarchy process Life cycle assessment Life cycle assessment
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| GB/T 7714 | Cheng, Xinyuan , Zhang, Hongru , Li, Wei et al. Utilizing diatomaceous earth (DE) as a sustainable substitute in alkali-activated cementitious materials: Performance and life cycle assessment [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 452 . |
| MLA | Cheng, Xinyuan et al. "Utilizing diatomaceous earth (DE) as a sustainable substitute in alkali-activated cementitious materials: Performance and life cycle assessment" . | CONSTRUCTION AND BUILDING MATERIALS 452 (2024) . |
| APA | Cheng, Xinyuan , Zhang, Hongru , Li, Wei , Zhang, Liquan . Utilizing diatomaceous earth (DE) as a sustainable substitute in alkali-activated cementitious materials: Performance and life cycle assessment . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 452 . |
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This study proposes the use of diatomaceous earth (DE) as a surface-treating agent for recycled aggregate (RA) to enhance the performance of recycled aggregate concrete (RAC). The treatment process involves pre-saturating the RA and applying a coating using a slurry composed of calcined DE and ordinary Portland cement at specific proportions. Test results demonstrate that the compressive and splitting tensile strengths of RAC can be significantly improved, with increases of up to 20.0% and 36.0% respectively. Additionally, the 28-day chloride diffusion coefficient of RAC can be reduced by up to 32.0% by adjusting the proportion of DE in the slurry. These improvements are not influenced by changes in the quality of the RA, but rather by the enhanced interfacial transition zone (ITZ) in RAC. Microscopic measurements of the ITZ reveal a layered structure resulting from the surface treatment, characterized by lower porosity and higher microhardness compared to the reference RAC. This enhanced ITZ is primarily responsible for the improved macro-scale performance of RAC. The findings of this study confirm the feasibility of using DE as a surface-treating agent for RA to produce RAC with enhanced strength and durability. Furthermore, it suggests the promising use of DE in the construction industry, avoiding the drawbacks associated with using high-dosage DE that can impact concrete consistency and water demand.
Keyword ：
Diatomaceous earth (DE) Diatomaceous earth (DE) Interfacial transition zone (ITZ) Interfacial transition zone (ITZ) Modification Modification Recycled aggregate (RA) Recycled aggregate (RA) Surface treatment Surface treatment
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| GB/T 7714 | Zhang, Hongru , Wan, Mengtao , Zhao, Yawan et al. Utilizing diatomaceous earth (DE) as a surface-treating agent of recycled aggregate (RA) for the performance modification of recycled aggregate concrete [J]. | MATERIALS AND STRUCTURES , 2024 , 57 (1) . |
| MLA | Zhang, Hongru et al. "Utilizing diatomaceous earth (DE) as a surface-treating agent of recycled aggregate (RA) for the performance modification of recycled aggregate concrete" . | MATERIALS AND STRUCTURES 57 . 1 (2024) . |
| APA | Zhang, Hongru , Wan, Mengtao , Zhao, Yawan , Wang, Yuanda , He, Bingjian , Yao, Jie . Utilizing diatomaceous earth (DE) as a surface-treating agent of recycled aggregate (RA) for the performance modification of recycled aggregate concrete . | MATERIALS AND STRUCTURES , 2024 , 57 (1) . |
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