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学者姓名：黄伟
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Abstract ：
在高压作用下,一些具有无定型相的水泥基粉末材料会发生接触硬化现象,粉末颗粒在压力作用下发生缩聚运动,并在粉末颗粒间形成结构键,进而快速形成具有一定强度及耐水性的人造石材.本文综述了压力作用下水泥基粉末材料接触硬化的成键机理以及粉末水分含量、干燥条件、钙硅比、压制过程对其接触硬化性能影响的研究进展.相关研究结果表明,压力作用下粉末颗粒间会形成氢键、范德华力、固体桥键等结构键;粉末水分含量是影响接触硬化性能的重要因素,在压力作用下,水分可以改变粉末颗粒的表面性质并影响颗粒之间的结合,进而改变压制成品的力学性能;钙硅比对接触硬化性能的影响显著,不同粉末材料在压制时的最佳钙硅比亦是不同;摩擦力的存在降低了压制效率,造成压制成品密度、强度分布不均匀,润滑剂的加入可以有效降低摩擦力的影响;此外,降低压制模具高径比并使用双面压制可有效提升压制成品的质量.
Keyword ：
压制工艺 压制工艺 接触硬化 接触硬化 无定型相 无定型相 水分含量 水分含量 水泥基粉末材料 水泥基粉末材料 结构键 结构键 钙硅比 钙硅比
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| GB/T 7714 | 张超 , 张子龙 , 黄伟 et al. 高压作用下水泥基粉末材料的接触硬化研究综述 [J]. | 材料导报 , 2024 , 38 (16) : 117-125 . |
| MLA | 张超 et al. "高压作用下水泥基粉末材料的接触硬化研究综述" . | 材料导报 38 . 16 (2024) : 117-125 . |
| APA | 张超 , 张子龙 , 黄伟 , 潘阿馨 , 赖志超 , 吴天赐 et al. 高压作用下水泥基粉末材料的接触硬化研究综述 . | 材料导报 , 2024 , 38 (16) , 117-125 . |
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超高性能混凝土(UHPC)的工作性和力学强度是其推广应用的关键。因此，本文采用和易性试验、流变测试、抗压强度测试、抗折强度测试，探究不同减水剂掺量和纤维物理参数下UHPC扩展度、经时损失、屈服强度、塑性黏度以及抗压强度、抗折强度的变化规律。结果表明，UHPC的扩展度均随着减水剂掺量和纤维掺量的增加先增大后减小；UHPC的经时损失主要与静置时间相关，UHPC静置时间越长，经时损失越大；UHPC的流变曲线呈剪切增稠的趋势；随着减水剂的增加，UHPC的屈服应力和塑性黏度均呈先减小后增大的趋势，并且均在减水剂掺量为1.00%(质量分数)时获得最小值；减水剂对强度的影响并不明显，UHPC的抗压强度随着纤维掺量的增加而增加，抗折强度随着纤维掺量的增加先增大后减小，在纤维长度为13.0 mm时UHPC的抗压性能最优，在纤维长度为20.0 mm时UHPC的抗折性能最优。
Keyword ：
力学性能 力学性能 扩展度 扩展度 流变性能 流变性能 经时损失 经时损失 超高性能混凝土 超高性能混凝土 钢纤维 钢纤维
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| GB/T 7714 | 黄斌 , 龚明子 , 潘阿馨 et al. 减水剂与钢纤维对超高性能混凝土流变及力学性能的影响 [J]. | 硅酸盐通报 , 2024 , 43 (09) : 3214-3223 . |
| MLA | 黄斌 et al. "减水剂与钢纤维对超高性能混凝土流变及力学性能的影响" . | 硅酸盐通报 43 . 09 (2024) : 3214-3223 . |
| APA | 黄斌 , 龚明子 , 潘阿馨 , 饶先鹏 , 王涛 , 陈晨 et al. 减水剂与钢纤维对超高性能混凝土流变及力学性能的影响 . | 硅酸盐通报 , 2024 , 43 (09) , 3214-3223 . |
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研究了在不同纤维素醚、乳胶粉及甲酸钙掺量下,水泥基瓷砖胶在不同约束条件下的自收缩性能.结果表明:乳胶粉掺量越大,瓷砖胶在自由条件下的自收缩越大;当纤维素醚掺量超过0.2％时,随着纤维素醚掺量的增加,自收缩降低;甲酸钙的掺量越大,自收缩也越大.乳胶粉掺量越大,瓷砖胶在约束条件下的自收缩越小;纤维素醚的掺入,可以抑制约束自收缩的发展,当纤维素醚掺量不超过0.3％时,对收缩影响不大,掺量达到0.4％时,可以显著降低瓷砖胶的自收缩;适当掺量的甲酸钙,增加了瓷砖胶早龄期的自收缩发展,但收缩终值会降低.
Keyword ：
可再分散乳胶粉 可再分散乳胶粉 甲酸钙 甲酸钙 纤维素醚 纤维素醚 约束收缩 约束收缩 自收缩 自收缩
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| GB/T 7714 | 邓旭辉 , 董启有 , 任海 et al. 聚合物对水泥基瓷砖胶自收缩性能影响研究 [J]. | 佛山陶瓷 , 2024 , 34 (11) : 19-23,43 . |
| MLA | 邓旭辉 et al. "聚合物对水泥基瓷砖胶自收缩性能影响研究" . | 佛山陶瓷 34 . 11 (2024) : 19-23,43 . |
| APA | 邓旭辉 , 董启有 , 任海 , 李云峰 , 任改霞 , 叶冠初 et al. 聚合物对水泥基瓷砖胶自收缩性能影响研究 . | 佛山陶瓷 , 2024 , 34 (11) , 19-23,43 . |
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本文研究了在自然环境、浸水环境、热老化环境及冻融环境下,使用偏高岭土、硅灰取代瓷砖胶中的水泥及不同聚合物掺量对瓷砖胶粘结强度的影响.结果表明:5％掺量的可再分散乳胶粉可以提升瓷砖胶的粘结强度、耐水性能、热老化性能及抗冻融性能;随着纤维素醚掺量的增加,瓷砖胶粘结强度与热老化性能提升,但耐水性能提升不大,甚至有害于抗冻融性能;随着甲酸钙掺量的增加,瓷砖胶粘结强度与热老化性能提升,但抗冻融性能及耐水性能却在降低.
Keyword ：
可再分散乳胶粉 可再分散乳胶粉 甲酸钙 甲酸钙 粘结强度 粘结强度 纤维素醚 纤维素醚 耐久性能 耐久性能
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| GB/T 7714 | 董启有 , 李云峰 , 任海 et al. 聚合物对水泥基瓷砖胶粘结强度及耐久性能影响研究 [J]. | 佛山陶瓷 , 2024 , 34 (10) : 13-16,23 . |
| MLA | 董启有 et al. "聚合物对水泥基瓷砖胶粘结强度及耐久性能影响研究" . | 佛山陶瓷 34 . 10 (2024) : 13-16,23 . |
| APA | 董启有 , 李云峰 , 任海 , 谢军 , 任改霞 , 叶冠初 et al. 聚合物对水泥基瓷砖胶粘结强度及耐久性能影响研究 . | 佛山陶瓷 , 2024 , 34 (10) , 13-16,23 . |
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伴随着我国矿产工业的快速发展,铁尾矿砂的排放量激增,目前对铁尾矿砂主要的处理方式仍以消极堆存、填埋为主,这不仅占据了大量土地资源,还造成了严重的环境污染,因此,铁尾矿砂的大规模消纳迫在眉睫.铁尾矿砂是在特定条件下,将铁矿石通过磨细、浮选或磁选等工艺选取"有用部分"后所排放的废弃物.与天然细集料相比,其颗粒较细,棱角分明且更加坚固,可广泛应用于建筑工程,其中,铁尾矿砂的地域差异、原矿组成、品位、粒度及开采选矿提炼工艺等都会对其理化性质产生较大的影响.铁尾矿砂的活性较低,需采用不同活化方法提高其活性,其中,复合活化是最有效的技术.本文针对国内外铁尾矿砂的建材资源化利用及在其他领域的应用展开了综述,归纳了利用铁尾矿砂制备混凝土对力学性能、耐久性等的影响,讨论了其应用于道路功能材料的关键性能,梳理了铁尾矿砂基砖的应用现状,评估了利用其制备地聚合物的可行性,论述了其在制备介孔分子筛及改良膨胀土方面的优势.
Keyword ：
活化 活化 特细砂 特细砂 资源化利用 资源化利用 选矿 选矿 铁尾矿砂 铁尾矿砂
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| GB/T 7714 | 黄伟 , 薛葵 , 张子龙 et al. 铁尾矿砂的研究与应用进展 [J]. | 硅酸盐通报 , 2024 , 43 (10) : 3655-3665 . |
| MLA | 黄伟 et al. "铁尾矿砂的研究与应用进展" . | 硅酸盐通报 43 . 10 (2024) : 3655-3665 . |
| APA | 黄伟 , 薛葵 , 张子龙 , 曹涌钢 , 王佳亮 , 邱文浩 et al. 铁尾矿砂的研究与应用进展 . | 硅酸盐通报 , 2024 , 43 (10) , 3655-3665 . |
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Under high pressure,some cement-based material powders with amorphous phase will undergo contact hardening,poly-condensation movement was occurred under pressure,and structural bond with certain strength will be formed between the powder particles,so as to quickly obtain artificial stone with certain strength and water resistance. In this paper,the bonding mechanism of cement-based material powder contact hardening under pressure and the effects of powder moisture content,drying conditions,calcium silicon ratio and pressing process on contact hardening performance are reviewed. Related research results show that hydrogen bonds,van der Waals forces,solid bridge bonds and other structural bonds are formed between powder particles under pressure. The moisture content of powder is an important factor affecting the contact hardening performance. Under pressure,the moisture can change the surface properties of powder particles and affect the bonding between particles,thereby influencing the mechanical properties of compaction products. The effect of calcium silicon ratio has a significant effect on the contact hardening properties,and the optimum calcium silicon ratio for different powder materials under pressing is also different. The existence of friction reduces the compaction efficiency,resulting in uneven distribution of density and strength of compacted products. The addition of lubricant can effectively reduce the influence of friction. In addition,reducing the height-diameter ratio of pressing die and using double-sided pressing can effectively improve the quality of the compaction products. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
Keyword ：
amorphous phase amorphous phase calcium silicon ratio calcium silicon ratio cement-based powder material cement-based powder material compacting technology compacting technology contact hardening contact hardening moisture content moisture content structural bond structural bond
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| GB/T 7714 | Zhang, C. , Zhang, Z. , Huang, W. et al. Review on the Contact Hardening Performance of Cement-based Powder Materials Under High Pressure; [高压作用下水泥基粉末材料的接触硬化研究综述] [J]. | Materials Reports , 2024 , 38 (16) . |
| MLA | Zhang, C. et al. "Review on the Contact Hardening Performance of Cement-based Powder Materials Under High Pressure; [高压作用下水泥基粉末材料的接触硬化研究综述]" . | Materials Reports 38 . 16 (2024) . |
| APA | Zhang, C. , Zhang, Z. , Huang, W. , Pan, A. , Lai, Z. , Wu, T. et al. Review on the Contact Hardening Performance of Cement-based Powder Materials Under High Pressure; [高压作用下水泥基粉末材料的接触硬化研究综述] . | Materials Reports , 2024 , 38 (16) . |
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With the rapid development of China’s mineral industry, the emission of iron tailings sand has increased sharply. At present, the negative storage and landfill are still the main treatment methods, which does not only occupy a large amount of land resources, but also cause serious environmental pollution. Therefore, large-scale consumption of iron tailings sand is imminent. Iron tailings sand is a kind of waste discharged after the ‘useful part’ of iron ore is selected by grinding, flotation or magnetic separation under a certain condition. Compared with natural fine aggregate, the particle is finer, angular and more solid, which could be widely used in various practical projects. Among them, the regional differences of iron tailings, raw ore composition, grade, particle size and mining beneficiation refining process have a greater impact on the physical and chemical properties. As an inert material, different activation methods could be conducted to improve the activity of iron tailings sand, whereas, the composite activation is the most effective technology. In this paper, the utilization of building materials of iron tailings sand at home and abroad and its application in other fields are reviewed. The influence of concrete prepared by iron tailings sand on mechanical properties and durability is summarized. The key properties of the application in road functional materials are discussed. The application status of iron tailings sand-based bricks is sorted out. The feasibility of using it to prepare geopolymer is evaluated. Its advantages in the preparation of mesoporous molecular sieves and the improvement of expansive soil are discussed. © 2024 Bulletin of the Chinese Ceramic Society Press. All rights reserved.
Keyword ：
activation activation extra fine sand extra fine sand iron tailings sand iron tailings sand mineral dressing mineral dressing resource utilization resource utilization
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| GB/T 7714 | Huang, W. , Xue, K. , Zhang, Z. et al. Research and Application Progress of Iron Tailings Sand; [铁尾矿砂的研究与应用进展] [J]. | Bulletin of the Chinese Ceramic Society , 2024 , 43 (10) : 3655-3665 . |
| MLA | Huang, W. et al. "Research and Application Progress of Iron Tailings Sand; [铁尾矿砂的研究与应用进展]" . | Bulletin of the Chinese Ceramic Society 43 . 10 (2024) : 3655-3665 . |
| APA | Huang, W. , Xue, K. , Zhang, Z. , Cao, Y. , Wang, J. , Qiu, W. et al. Research and Application Progress of Iron Tailings Sand; [铁尾矿砂的研究与应用进展] . | Bulletin of the Chinese Ceramic Society , 2024 , 43 (10) , 3655-3665 . |
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超高性能混凝土(UHPC)加固修复既有石结构中，UHPC与石材之间优异的黏结性能是保证加固效果的关键。因此，为探究UHPC-石材界面的黏结性能，通过劈裂抗拉试验和双L型剪切试验，考察不同界面处理方式对UHPC-石材界面黏结性能的影响。结果表明，UHPC-石材界面破坏模式主要分为三种，其中发生模式C破坏(石材UHPC破坏)时界面黏结强度最大。界面键槽处理方式能显著提高UHPC-石材界面黏结强度、界面剪切刚度，且在改变破坏形态的同时有效提升试件的延性，当键槽深度为20 mm时，试件表现出较好的界面黏结性能。另外，试件剪切荷载-位移曲线包含滑移前阶段和滑移后阶段，凿毛试件在滑移后阶段没有经历塑性变形。相同界面处理方式下，UHPC-石材的界面抗剪强度与界面劈裂抗拉强度呈正相关关系。
Keyword ：
UHPC-石材界面 UHPC-石材界面 剪切试验 剪切试验 劈裂抗拉试验 劈裂抗拉试验 界面剪切刚度 界面剪切刚度 键槽处理 键槽处理 黏结强度 黏结强度
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| GB/T 7714 | 黄伟 , 黄雅莹 , 陈雪莉 et al. 超高性能混凝土-石材界面黏结性能试验研究 [J]. | 硅酸盐通报 , 2024 , 43 (02) : 397-406,417 . |
| MLA | 黄伟 et al. "超高性能混凝土-石材界面黏结性能试验研究" . | 硅酸盐通报 43 . 02 (2024) : 397-406,417 . |
| APA | 黄伟 , 黄雅莹 , 陈雪莉 , 吴应雄 , 郑新颜 , 张恒春 . 超高性能混凝土-石材界面黏结性能试验研究 . | 硅酸盐通报 , 2024 , 43 (02) , 397-406,417 . |
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The workability and mechanical strength of ultra-high performance concrete (UHPC) are the key to its popularization and application. Therefore, this paper used workability test, rheological test, compressive strength test and flexural strength test to explore the variation of UHPC fluidity, time loss, yield strength, plastic viscosity, compressive strength, and flexural strength under different water reducing agent content and fiber physical parameters. The results show that the fluidity of UHPC increases first and then decreases with the increase of water reducing agent content and fiber content. The time loss of UHPC is mainly related to standing time. The longer the standing time of UHPC is, the greater the time loss is. The rheological curve of UHPC shows a trend of shear thickening. With the increase of water reducing agent, the yield stress and plastic viscosity of UHPC decrease first and then increase, and the minimum value is obtained when the content of water reducing agent is 1. 00% (mass fraction). The effect of water reducing agent on strength is not obvious. The compressive strength of UHPC increases with the increase of fiber content, and the flexural strength increases first and then decreases with the increase of fiber content. When the fiber length is 13. 0 mm, the compressive performance of UHPC is the best, and the flexural performance is the best when the fiber length is 20. 0 mm. © 2024 Bulletin of the Chinese Ceramic Society Press. All rights reserved.
Keyword ：
fluidity fluidity mechanical property mechanical property rheological property rheological property steel fiber steel fiber time loss time loss ultra-high performance concrete ultra-high performance concrete
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| GB/T 7714 | Huang, B. , Gong, M. , Pan, A. et al. Influences of Water Reducing Agent and Steel Fiber on Rheological and Mechanical Properties of Ultra-High Performance Concrete; [减水剂与钢纤维对超高性能混凝土流变及力学性能的影响] [J]. | Bulletin of the Chinese Ceramic Society , 2024 , 43 (9) : 3214-3223 . |
| MLA | Huang, B. et al. "Influences of Water Reducing Agent and Steel Fiber on Rheological and Mechanical Properties of Ultra-High Performance Concrete; [减水剂与钢纤维对超高性能混凝土流变及力学性能的影响]" . | Bulletin of the Chinese Ceramic Society 43 . 9 (2024) : 3214-3223 . |
| APA | Huang, B. , Gong, M. , Pan, A. , Rao, X. , Wang, T. , Chen, C. et al. Influences of Water Reducing Agent and Steel Fiber on Rheological and Mechanical Properties of Ultra-High Performance Concrete; [减水剂与钢纤维对超高性能混凝土流变及力学性能的影响] . | Bulletin of the Chinese Ceramic Society , 2024 , 43 (9) , 3214-3223 . |
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Ultra -high performance concrete (UHPC) is an innovative cement -based composite material characterized by extremely high durability and mechanical properties, which provides a potential possibility of using non -desalted sea -sand as aggregate. However, the long-term steel corrosion behavior in UHPC prepared by simulated sea -sand under different immersion environments remains unclear, which is of great significance for the application of sea -sand UHPC in practical engineering. In this study, the pore structure of sea -sand UHPC matrix was measured using nitrogen adsorption/desorption method. The corrosion behavior of rebar in sea -sand UHPC with different endogenous chloride ion contents soaking in pure water and NaCl solution was characterized by linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS) and cyclic polarization (CP). The experimental results show that the initial UHPC pore structure is refined by incorporation of sea -sand, and is similar to that of ordinary UHPC at the later hydration. Regardless of the endogenous chloride ion content and immersion environment, the corrosion rate evaluated by corrosion current density (icorr) and polarization resistance (Rp) of reinforcement in UHPC is extremely low. The measurement of EIS shows that UHPC group has higher matrix resistance (Rc) and charge transfer resistance (Rct), while lower electric double layer capacitance (CPEdl) of reinforcement, which indicates that the steel in UHPC made of sea -sand is still in a state of passivation. However, the steel bar in comparison specimen OPC soaking in NaCl solution is in the corrosion stage. Furthermore, sea -sand UHPC possesses of excellent ability of anti -pitting corrosion of reinforcement after 180 days of immersion in NaCl solution.
Keyword ：
Corrosion behavior Corrosion behavior Endogenous chloride level Endogenous chloride level Immersion environment Immersion environment Pore structure Pore structure Sea -sand UHPC Sea -sand UHPC
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| GB/T 7714 | Huang, Wei , He, Lian , Chen, Zhendong et al. Effect of endogenous chloride ion on the corrosion behavior of reinforcement embedded in sea-sand UHPC matrix in different immersion environments [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 90 . |
| MLA | Huang, Wei et al. "Effect of endogenous chloride ion on the corrosion behavior of reinforcement embedded in sea-sand UHPC matrix in different immersion environments" . | JOURNAL OF BUILDING ENGINEERING 90 (2024) . |
| APA | Huang, Wei , He, Lian , Chen, Zhendong , Yin, Jianli , Huang, Qingwei , Chen, Rong et al. Effect of endogenous chloride ion on the corrosion behavior of reinforcement embedded in sea-sand UHPC matrix in different immersion environments . | JOURNAL OF BUILDING ENGINEERING , 2024 , 90 . |
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