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学者姓名：罗素蓉
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Abstract ：
为了提高聚乙烯醇(PVA)纤维增强水泥基材料的力学性能,将氧化石墨烯(GO)引入PVA纤维增强水泥基材料中,探究GO掺量在0%～0.05%范围内对材料单轴拉伸性能的影响.结果表明:掺入适量的GO能够有效提高材料的单轴拉伸性能,当GO掺量为0.01%时,28 d时材料的初裂拉伸强度、极限拉伸强度和极限拉伸应变均达到最大值,与未掺GO的对照组相比分别提高了26.97%、31.28%、23.25%;适量的GO可以优化孔隙结构,减少材料内部缺陷,促进水化产物的生成,使微观结构致密化,增强纤维和基体间的界面结合力,从而改善PVA纤维增强水泥基材料的宏观性能.
Keyword ：
单轴拉伸性能 单轴拉伸性能 微观性能 微观性能 氧化石墨烯 氧化石墨烯 水泥基材料 水泥基材料 聚乙烯醇(PVA)纤维 聚乙烯醇(PVA)纤维
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| GB/T 7714 | 罗素蓉 , 姚佳敏 , 周恩泉 et al. 氧化石墨烯改性纤维增强水泥基材料的拉伸性能 [J]. | 建筑材料学报 , 2024 , 27 (5) : 400-407 . |
| MLA | 罗素蓉 et al. "氧化石墨烯改性纤维增强水泥基材料的拉伸性能" . | 建筑材料学报 27 . 5 (2024) : 400-407 . |
| APA | 罗素蓉 , 姚佳敏 , 周恩泉 , 王世杰 . 氧化石墨烯改性纤维增强水泥基材料的拉伸性能 . | 建筑材料学报 , 2024 , 27 (5) , 400-407 . |
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Abstract ：
3D打印水泥基材料堆叠成型的工艺导致其条间接触面性能下降，偏高岭土的加入能够使材料孔隙率降低，力学性能提高，但偏高岭土的高需水性会造成打印条带表面水分损失，层间黏结性能下降，而石灰石粉的稀释效应可以改善这一点。本文研究了复掺偏高岭土与石灰石粉对3D打印水泥基材料各向异性的影响，并通过微观角度解释这两种材料影响力学性能的机理。结果表明，偏高岭土最佳质量掺量为12%,最佳复掺质量比例m(偏高岭土)∶m(石灰石粉)为2∶1,3D打印水泥基材料掺入偏高岭土后流动度显著下降，复掺石灰石粉后流动度提高。3D打印试块各方向抗压强度的大小为X>Z>Y>筑模，不同方向抗折强度变化规律与抗压强度基本相同，具有各向异性特征。
Keyword ：
3D打印 3D打印 偏高岭土 偏高岭土 各向异性 各向异性 抗压强度 抗压强度 抗折强度 抗折强度 石灰石粉 石灰石粉
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| GB/T 7714 | 张钊睿 , 罗素蓉 , 林欣 . 偏高岭土与石灰石粉增强3D打印水泥基材料的各向异性研究 [J]. | 硅酸盐通报 , 2024 , 43 (05) : 1651-1662,1682 . |
| MLA | 张钊睿 et al. "偏高岭土与石灰石粉增强3D打印水泥基材料的各向异性研究" . | 硅酸盐通报 43 . 05 (2024) : 1651-1662,1682 . |
| APA | 张钊睿 , 罗素蓉 , 林欣 . 偏高岭土与石灰石粉增强3D打印水泥基材料的各向异性研究 . | 硅酸盐通报 , 2024 , 43 (05) , 1651-1662,1682 . |
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To solve the problem of the lack of structural design basis of fiber reinforced recycled aggregate concrete (FRAC), and promote its realistic application, in this investigation, the replacement ratio of recycled coarse aggregate (RCA), fiber type, fiber content, and fiber blending forms are taken as experimental variables. With the size of Phi 100 mmx300 mm, 21 groups of cylindrical specimens are designed to study the influence of the above variables on the complete stress-strain curve of fiber RAC when bearing uniaxial tension. The results show that the tensile characteristic values decrease as the replacement ratio of RCA increases. When single doping of fibers was considered, the tensile characteristic values increased as fiber content increased. When the steel (SF) was mixed with polyvinyl alcohol fiber (PVAF) and polypropylene fiber (PPF), the tensile characteristic values were improved. Proper blending of PVAF and PPF can improve the characteristic values of tensile ductility. Through the results of the uniaxial tensile experiment, constitutive equations of the uniaxial tensile stress-strain curve of FRAC under different test variables were established, which can provide fundamental material parameters to design FRAC structures.
Keyword ：
Constitutive relationship Constitutive relationship Fiber Fiber Recycled aggregate concrete (RAC) Recycled aggregate concrete (RAC) Uniaxial tensile stress-strain curve Uniaxial tensile stress-strain curve
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| GB/T 7714 | Luo, Surong , Zhou, Wentao , Yu, Minming et al. Stress-strain relationship of fiber reinforced recycled aggregate concrete under uniaxial tension [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 422 . |
| MLA | Luo, Surong et al. "Stress-strain relationship of fiber reinforced recycled aggregate concrete under uniaxial tension" . | CONSTRUCTION AND BUILDING MATERIALS 422 (2024) . |
| APA | Luo, Surong , Zhou, Wentao , Yu, Minming , Zhang, Kaijian , Zhang, Qingtian . Stress-strain relationship of fiber reinforced recycled aggregate concrete under uniaxial tension . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 422 . |
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To explore the flexural fatigue performance of steel fibers reinforced recycled aggregate concrete (SF-RAC), the flexural fatigue test and residual strength test with different stress levels were conducted. Besides, the fatigue cracks propagation under cyclic loading were observed and analyzed by digital image correlation (DIC) technology. The results show that the flexural fatigue life of SF-RAC increases when the content of steel fibers increases, and it is proved to be well in accordance with the three-parameter Weibull distribution. The flexural fatigue life equation with different stress level and reliability (S-N-P equation) is obtained based on it, which shows that when the fiber volume content is 1.5%, the fatigue strength of SF-RAC is about 37.2% higher than that of RAC without fibers. Then, a fatigue strain-based damage evolution model is established, and the derived residual strength model can well predict the damage degree and residual life of SF-RAC. Moreover, the steel fibers can improve the critical crack propagation length and loading cycles of RAC. The crack propagation rate can be decreased by 97.63% when the fiber volume content is 1.5%, and it is increased with the development of stress level. Finally, the influence mechanism of steel fibers on flexural fatigue performance of RAC were explained through microstructure tests.
Keyword ：
Crack propagation rate Crack propagation rate Digital image correlation (DIC) Digital image correlation (DIC) Flexural fatigue performance Flexural fatigue performance Recycled aggregate concrete (RAC) Recycled aggregate concrete (RAC) Steel fibers Steel fibers Three -parameter Weibull distribution Three -parameter Weibull distribution
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| GB/T 7714 | Luo, Surong , Su, Yongqing , Zhang, Qingtian et al. Effects of steel fibers on the flexural fatigue performance of recycled aggregate concrete [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 412 . |
| MLA | Luo, Surong et al. "Effects of steel fibers on the flexural fatigue performance of recycled aggregate concrete" . | CONSTRUCTION AND BUILDING MATERIALS 412 (2024) . |
| APA | Luo, Surong , Su, Yongqing , Zhang, Qingtian , Zhang, Kaijian . Effects of steel fibers on the flexural fatigue performance of recycled aggregate concrete . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 412 . |
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Economic and environmentally friendly polypropylene (PP) fibre and polyvinyl alcohol (PVA) fibre were found to be beneficial to the strength of recycled coarse aggregate concrete (RCAC), but the effects in the fracture properties of the RCAC has been overlooked. This study added PP fibre and PVA fibre to enhance the ability of the RCAC to resist crack instability expansion. The three-point bending tests were performed to compare the fracture properties of the RCAC with fibres and without fibre. The reinforcement mechanism of fibres was analyzed by the single-fibre pullout tests and scanning electron microscopy tests. The experimental results indicated that fibres could not effectively increase the compressive strength of RCAC but the splitting tensile strength of RCAC was significantly improved with the increase of the volume fraction of fibres and the optimal volume fraction of fibre was 1.5% PP fibre. The PP fibre and PVA fibre both effectively improved the fracture properties of RCAC but acted in the post-cracking stage and the linear loading stage, respectively. As a concrete manifestation of the PP fibre was more effective in increasing the peak load, unstable toughness, and fracture energy of RCAC than the PVA fibre while the PVA fibre was more effective in increasing the initial cracking load and the initial toughness. The 1.0% PP fibre had the best effect on the fracture properties, which increased peak load, unstable toughness, and fracture energy by 47.2%, 42.3%, and 5500%, respectively. The 0.2% PVA has the best effect on the fracture properties of RCAC at the stage before the cracks developed which increased initial cracking load and initial toughness by 25.2% and 43.7%, respectively. In addition, the development of cracks of RCAC with PP fibre was more tortuous than that of RCAC with PVA fibre. A reinforcement mechanism analysis showed that there were obvious diamond-shaped depressions on the surface of PP fibre which provided mechanical interlock to enhance the RCAC. The hydrogen bonds of PVA fibre also enhanced the RCAC through the hydration products attached to the surface of the PVA but it is weaker than diamond-shaped depressions. These results provided theoretical and experimental support for the research gap of PP fibre and PVA fibre in RCAC.
Keyword ：
Crack propagation Crack propagation Fracture energy Fracture energy Fracture toughness Fracture toughness Mechanism analysis Mechanism analysis Polypropylene fibre Polypropylene fibre Polyvinyl alcohol fibre Polyvinyl alcohol fibre Recycled coarse aggregate concrete Recycled coarse aggregate concrete
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| GB/T 7714 | Lin, Qian , Luo, Surong , Lin, Kaida et al. Effects of synthetic fibres on the fracture behaviours of recycled coarse aggregate concrete [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 418 . |
| MLA | Lin, Qian et al. "Effects of synthetic fibres on the fracture behaviours of recycled coarse aggregate concrete" . | CONSTRUCTION AND BUILDING MATERIALS 418 (2024) . |
| APA | Lin, Qian , Luo, Surong , Lin, Kaida , Wang, Dehui . Effects of synthetic fibres on the fracture behaviours of recycled coarse aggregate concrete . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 418 . |
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本实用新型公开的一种再生混凝土骨料加工装置，包括底座、支撑架、加固架、预粉碎进料管、进料粉碎组件和振动筛分组件，进料粉碎组件包括旋转电机、转轴、推进桨、加料管、粉碎管、连接软管、驱动电机、转动轴和粉碎辊，振动筛分组件包括固定柱、弹簧、滑动柱、筛分箱、振动电机、上过滤板、下过滤板、连接管和下料管。本实用新型属于混凝土加工技术领域，具体是一种将混凝土骨料进行匀速的向前推送，在推送过程可以将较大直径的混凝土骨料进行挤碎，可以对混凝土骨料进行破碎后可以对破碎混凝土骨料的筛分，及破碎和筛分为一体的再生混凝土骨料加工装置。
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| GB/T 7714 | 石丽云 , 罗素蓉 , 林钊 et al. 一种再生混凝土骨料加工装置 : CN202222016915.4[P]. | 2022-08-02 00:00:00 . |
| MLA | 石丽云 et al. "一种再生混凝土骨料加工装置" : CN202222016915.4. | 2022-08-02 00:00:00 . |
| APA | 石丽云 , 罗素蓉 , 林钊 , 谢志敏 . 一种再生混凝土骨料加工装置 : CN202222016915.4. | 2022-08-02 00:00:00 . |
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本实用新型公开的一种环保混凝土生产用混凝土配料机，包括搅拌壳体和支撑腿，所述支撑腿设于搅拌壳体底部，所述支撑腿呈两两对称设置，还包括震动搅拌组件、防尘给水组件和出料翻动组件，所述震动搅拌组件设于搅拌壳体内部，所述防尘给水组件设于搅拌壳体外侧壁，所述出料翻动组件设于搅拌壳体底部，所述出料翻动组件设于对称设置的支撑腿之间，所述防尘给水组件包括放置板、水泵、支撑杆和喷水板。本实用新型属于配料机技术领域，具体是一种搅拌壳体内部给水与上部防尘同步进行，对搅拌壳体内部的混凝土进行震动，防止结块，增加搅拌效果，转动的对搅拌壳体上部进行降尘处理的环保混凝土生产用混凝土配料机。
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| GB/T 7714 | 石照煌 , 罗素蓉 , 黄欢 et al. 一种环保混凝土生产用混凝土配料机 : CN202222016946.X[P]. | 2022-08-02 00:00:00 . |
| MLA | 石照煌 et al. "一种环保混凝土生产用混凝土配料机" : CN202222016946.X. | 2022-08-02 00:00:00 . |
| APA | 石照煌 , 罗素蓉 , 黄欢 , 石丽云 . 一种环保混凝土生产用混凝土配料机 : CN202222016946.X. | 2022-08-02 00:00:00 . |
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本实用新型公开了一种再生混凝土的粉碎装置，包括粉碎箱，粉碎箱顶端的中部设有进料斗，进料斗内设有粉碎通道一，粉碎箱内设有筛分室，粉碎箱内位于筛分室顶部设有粉碎通道二，粉碎通道一与粉碎通道二连通设置，粉碎通道一内两侧均滑动连接设有粉碎机构一，粉碎通道二内转动连接设有粉碎机构二，筛分室内侧壁之间滑动连接设有筛分斗，粉碎箱一侧的底部与筛分室连通设有出料口，筛分室内底壁朝向出料口向下倾斜设置，粉碎箱侧壁匹配筛分斗连接设有侧门。本实用新型与现有技术相比的优点在于：提供一种粉碎效果好，可以进行二次粉碎，同时可以进行二次筛分的一种再生混凝土的粉碎装置。
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| GB/T 7714 | 罗素蓉 , 王德辉 , 黄欢 et al. 一种再生混凝土的粉碎装置 : CN202221963603.8[P]. | 2022-07-28 00:00:00 . |
| MLA | 罗素蓉 et al. "一种再生混凝土的粉碎装置" : CN202221963603.8. | 2022-07-28 00:00:00 . |
| APA | 罗素蓉 , 王德辉 , 黄欢 , 石照煌 . 一种再生混凝土的粉碎装置 : CN202221963603.8. | 2022-07-28 00:00:00 . |
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In order to expand the application range of recycled concrete and fully realize its economic and low-carbon benefits, the application of composite recycled concrete and its derivative structures were analyzed and sorted, and the characteristics of recycled aggregate and recycled concrete were summarized. The problems of composite recycled concrete were analyzed and the future research was prospected. The results show that recycled concrete has the characteristics of low strength and small elastic modulus compared with ordinary concrete. It is often difficult to meet the mechanical properties and functional requirements of various parts of the structure by relying on recycled concrete itself. Through the forms of composite recycled concrete, recycled concrete is combined with other concrete in the form of components and structures, or the recycled aggregate is combined with other aggregates. Concrete that meets the performance requirements can be placed on specific parts, which is not only environmentally friendly but also can give full play to the respective advantages. The interfacial shear strength between different concretes has an important influence on the performance of composite recycled concrete structures. The shear strength is affected by many factors such as interfacial roughness, binder and concrete strength. Increasing the interfacial roughness can effectively improve the integrity and safety of composite recycled concrete and its derivative structures. The combinations of composite recycled concrete with BIM, 3D printing, prefabricated buildings and smart materials can achieve green construction while ensuring structural performance. © 2023, Editorial Department of Journal of Architecture and Civil Engineering. All rights reserved.
Keyword ：
combination level combination level composite recycled concrete composite recycled concrete interface property interface property new technique new technique recycled concrete recycled concrete
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| GB/T 7714 | Xiao, J. , Lan, Q. , Zhang, Q. et al. Application and prospect of composite recycled concrete and its derived structures [J]. | Journal of Architecture and Civil Engineering , 2023 , 40 (1) : 1-13 . |
| MLA | Xiao, J. et al. "Application and prospect of composite recycled concrete and its derived structures" . | Journal of Architecture and Civil Engineering 40 . 1 (2023) : 1-13 . |
| APA | Xiao, J. , Lan, Q. , Zhang, Q. , Zhang, K. , Luo, S. . Application and prospect of composite recycled concrete and its derived structures . | Journal of Architecture and Civil Engineering , 2023 , 40 (1) , 1-13 . |
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The characteristics of seawater sea sand concrete become a recent research issue, while the alkali-silica reaction (ASR) of seawater sea sand concrete is still unclear. To clarify the influence of supplementary cementitious materials on the alkali-silica reaction characteristics of seawater and sea sand concrete, the cement-metakaolin-fly ash-slag cementitious materials were designed by a simplex centroid design method. The effect of supplementary cementitious materials on the ASR products, pore structure, pore solution pH value, alkali ion content and expansion rate of seawater and sea sand concrete was investigated. The results show that the content of the amorphous product ASR-P1(K0.52Ca1.16Si4O8(OH)2.84·1.5H2O) and the crystalline product Na-shlykovite (NaCaSi4O8(OH)3·2.3H2O) in seawater and sea sand concrete are inversely proportional to the content of active SiO2 and Al2O3 in supplementary cementitious materials. Among the seawater and sea sand concretes with different cementitious materials, the pH value of paste prepared with 50% cement+25% metakaolin+25% fly ash and the contents of Na+, K+ and Ca2+ are the minimum values. As a result, the content of ASR-P1 and Na-shlykovite, the content of harmful pores and multi-harmful pores are the minimum values, as well as the porosity is the maximum value, thus resulting in the minimum expansion rate of the paste prepared with 25% metakaolin+25% fly ash +50% cement at 14 d and 28 d. This paper can provide a theoretical basis for the design of cementitious material composition of seawater and sea sand concrete, and improve the service life of seawater and sea sand concrete structure in marine engineering. © 2023 Chinese Ceramic Society. All rights reserved.
Keyword ：
Alumina Alumina Aluminum oxide Aluminum oxide Cements Cements Concrete products Concrete products Fly ash Fly ash Pore structure Pore structure Product design Product design Sand Sand Silica Silica Silicates Silicates Slags Slags Sodium compounds Sodium compounds
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| GB/T 7714 | Wang, Dehui , Zhang, Qizhi , Gong, Qingnan et al. Influence of Supplementary Cementitious Materials on Alkali-Silicate Reaction Characteristics of Seawater and Sea Sand Concrete [J]. | Journal of the Chinese Ceramic Society , 2023 , 51 (11) : 2955-2965 . |
| MLA | Wang, Dehui et al. "Influence of Supplementary Cementitious Materials on Alkali-Silicate Reaction Characteristics of Seawater and Sea Sand Concrete" . | Journal of the Chinese Ceramic Society 51 . 11 (2023) : 2955-2965 . |
| APA | Wang, Dehui , Zhang, Qizhi , Gong, Qingnan , Luo, Surong . Influence of Supplementary Cementitious Materials on Alkali-Silicate Reaction Characteristics of Seawater and Sea Sand Concrete . | Journal of the Chinese Ceramic Society , 2023 , 51 (11) , 2955-2965 . |
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