用于机场路面薄层修补的纳米二氧化硅/聚氨酯改性不饱和聚酯树脂砂浆

IF 2.3 3区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Journal of Reinforced Plastics and Composites Pub Date : 2024-05-28 DOI:10.1177/07316844241256415

Hongliang Zhang, Xinyue Liu, Ning Wang

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引用次数: 0

摘要

本文介绍了一种用于跑道修复的新型增韧聚合物砂浆，它具有出色的抗冲击性、高强度和成本效益。为了增强不饱和聚酯（UP）聚合物砂浆的韧性，在其中加入了纳米二氧化硅和聚氨酯（PU）。首先，通过拉伸试验和冲击试验确定了纳米二氧化硅和聚氨酯的最佳用量。然后，通过显微图像技术探讨了纳米二氧化硅/聚氨酯对 UP 树脂的改性机理。此外，还进行了抗压、抗弯、流动性、抗弯粘结强度和施工时间试验，以确定纳米二氧化硅/聚氨酯改性 UP 树脂砂浆的最佳配方。最后，研究了改性 UP 树脂砂浆的耐久性、抗冲击性、抗渗性、防滑性和层间粘结强度，并与纯 UP 树脂砂浆和环氧（EP）树脂砂浆进行了比较。结果表明，纳米二氧化硅/聚氨酯改性 UP 树脂的最佳质量配比为 UP 树脂：聚氨酯：二月桂酸二丁基锡：纳米二氧化硅：引发剂：促进剂：稀释剂：增塑剂=1：0.1：0.002：0.01：0.01：0.01：0.15：0.01。此外，改性 UP 树脂与骨料的质量比例为 1:1.2。在对 UP 树脂进行纳米二氧化硅/聚氨酯改性时，聚氨酯的 -NCO 基团与 UP 的 -OH 基团发生了化学作用，而纳米二氧化硅与 UP 树脂只是物理混合。与纯 UP 树脂砂浆相比，纳米二氧化硅/聚氨酯改性 UP 树脂砂浆的收缩率降低了 44%，腐蚀损失减少了约 20%，冻融损失降低了 32%，抗冲击性提高了 37%，剪切粘结强度、弯曲粘结强度和拉伸粘结强度分别提高了 44%、33% 和 47%。虽然改性 UP 树脂砂浆在干缩、耐腐蚀、防滑和拉伸粘结强度方面的性能略低于 EP 树脂砂浆，但其冻融耐久性、抗冲击性、挠曲粘结强度和剪切粘结强度却超过了 EP 树脂砂浆。这三种材料都具有优异的抗渗性。改性 UP 树脂充分利用了聚氨酯和纳米二氧化硅的优点，是一种具有良好韧性、高稳定性和低成本的机场路面修复材料。

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Nano-SiO2/polyurethane modified unsaturated polyester resin mortar for thin layer repairing on airport pavement

This paper introduces a novel toughened polymer mortar designed for runway repair, featuring outstanding impact resistance, high strength, and cost-effectiveness. To augment the toughness of unsaturated polyester (UP) polymer mortar, nano-SiO2 and polyurethane (PU) were incorporated. Firstly, the optimal dosages of nano-SiO2 and PU were determined through tensile test and impact test. Then, the modification mechanism of nano-SiO2/PU on UP resin was explored by microscopic image technology. In addition, the compression, flexural, fluidity, flexural bond strength and construction time tests were carried out to determine the optimal formula of nano-SiO2/PU modified UP resin mortar. Finally, the durability, impact resistance, impermeability resistance, skid resistance, and interlayer bond strength of modified UP resin mortar were studied and compared with those of pure UP resin mortar and epoxy (EP) resin mortar. Results show that the optimum proportion by mass for nano-SiO2/polyurethane modified UP resin is, UP resin: PU: dibutyltin dilaurate: nano-SiO2: initiator: accelerator: diluent: plasticizer = 1: 0.1: 0.002: 0.01: 0.01: 0.01:0.15:0.01. Furthermore, the mass proportion of modified UP resin to aggregate is 1: 1.2. In nano-SiO2/PU modification of UP resin, the -NCO groups of PU have been involved in chemical interaction with the -OH group of UP, while nano-SiO2 and UP resin are blended physically only. Compared with pure UP resin mortar, the nano-SiO2/PU modified UP resin mortar exhibited a 44% reduction in shrinkage rate, approximately 20% less corrosion loss, a 32% decrease in freeze-thaw loss, a 37% improvement in impact resistance, and increased shear bonding strength, flexural bonding strength, and tensile bonding strength by 44%, 33%, and 47%, respectively. Although the modified UP resin mortar demonstrated slightly lower performance in terms of dry shrinkage, corrosion resistance, skid resistance, and tensile bond strength compared to EP resin mortar, its freeze-thaw durability, impact resistance, flexural bond strength, and shear bond strength surpassed those of EP resin mortar. All three materials exhibited excellent impermeability. Leveraging the advantages of PU and nano-SiO2, the modified UP resin presents a promising repair material for airport pavement with enhanced toughness, high stability, and reduced cost.

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来源期刊

Journal of Reinforced Plastics and Composites 工程技术-材料科学：复合

CiteScore

5.40

自引率

6.50%

发文量

审稿时长

1.3 months

期刊介绍： The Journal of Reinforced Plastics and Composites is a fully peer-reviewed international journal that publishes original research and review articles on a broad range of today''s reinforced plastics and composites including areas in: Constituent materials: matrix materials, reinforcements and coatings. Properties and performance: The results of testing, predictive models, and in-service evaluation of a wide range of materials are published, providing the reader with extensive properties data for reference. Analysis and design: Frequency reports on these subjects inform the reader of analytical techniques, design processes and the many design options available in materials composition. Processing and fabrication: There is increased interest among materials engineers in cost-effective processing. Applications: Reports on new materials R&D are often related to the service requirements of specific application areas, such as automotive, marine, construction and aviation. Reports on special topics are regularly included such as recycling, environmental effects, novel materials, computer-aided design, predictive modelling, and "smart" composite materials. "The articles in the Journal of Reinforced Plastics and Products are must reading for engineers in industry and for researchers working on leading edge problems" Professor Emeritus Stephen W Tsai National Sun Yat-sen University, Taiwan This journal is a member of the Committee on Publication Ethics (COPE).