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Journal of Zhejiang University SCIENCE A

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Experimental investigation of the thermal insulation performance of Ce/Si/Ti oxide heat-reflective coating

Author(s): Rui SU, Yue LV, Qian SU, Yanfei PEI
Affiliation(s): School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
Corresponding email(s): suqian@126.com
Key Words: Track slab; Solar radiation; Thermochromic coating; Cooling performance

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Abstract: To solve the problem of deformation and cracking of ballastless track slab under temperature load, a composite oxide and a series of heat-reflective coating samples were prepared. At the microscopic level, the elemental composition and optical properties of the materials prepared were analyzed by Fourier transform infrared spectroscopy and ultraviolet-visible spectroscopy, and the feasibility of Ce/Si/Ti oxide as functional fillers for heat-reflective coatings of track slabs was demonstrated. At the macro level, by designing and assembling an indoor sunlight simulation test device, the surface and internal temperatures of the coated and uncoated concrete specimens were analyzed and studied, and the macroscopic cooling effect of the coatings was evaluated. Also, to study the engineering application effect of the track slab thermal insulation reflective coating, COMSOL was used to build a 3D calculation model of the heat transfer deformation of the ballastless track slab structure. The research results showed that: Ce/Si/Ti oxide has strong reflectivity and can reflect 95% of infrared light; it has good ultraviolet (UV) shielding ability and can absorb more than 65% of the UV light. The TiO₂ coating can reduce the temperature of the concrete surface by 6‍–11°Cand that of the inside of the concrete by 10‍–‍14°C; the cooling effect decreases evenly with the increase of air temperature. The Ce/Si/Ti oxide coating can reduce the surface temperature of the concrete by 16 °C and that of the inside of the concrete by 15 °C. In addition, the cooling effect is basically not affected by the air temperature, and it changes non-linearly with the increase of the Ce/Si/Ti oxide content. Numerical calculation shows that the heat reflective coating can reduce the surface temperature and internal temperature difference of the track slab by 11.54–21.31 °C, and the vertical displacement of the track slab can be reduced by about 35%‍–‍70%. Considering the cooling effect, the adhesion strength, and the engineering application effect of the coating, the optimal doping amount of Ce/Si/Ti oxide is 40%, and that coating is the most suitable for use as a ballastless track heat reflective coating.

Ce/Si/Ti氧化物热反射涂层对高速铁路轨道板温度场影响及其优化研究

作者：苏芮，吕悦，苏谦，裴彦飞
机构：西南交通大学，土木工程学院，中国成都，610031
目的：为解决无砟轨道板在温度荷载作用下变形开裂的问题，本文研制了一种复合氧化物，并制备一系列热反射涂层试样，旨在通过宏观和微观试验，以及数值仿真探究影响涂层降温效果的环境温度，得到一种能够有效减小无砟轨道板温度应力和温度变形的热反射涂层，以提高轨道板的使用寿命，减少维修次数。
创新点：1.制备一种具有紫外屏蔽性的无机复合氧化颗粒；2.设计一系列复合氧化物热反射涂层；3.研制室内太阳光模拟试验系统；4.通过室内试验分析涂层降温效果。
方法：1.制备一系列热反射涂层；2.微观层面，通过傅里叶变换红外、紫外可见光谱，对本文所制备材料进行成分和光学特性分析，论证Ce/Si/Ti氧化物作为轨道板热反射涂层功能填料的可行性；3.宏观层面，通过搭建室内太阳光模拟测试装置，分别对有涂层和没有涂层的混凝土试件表面和内部温度进行分析研究，讨论本文所制备涂层的宏观隔热效果；4.通过数值仿真对轨道板结构传热变形三维模型研究轨道板隔热反射涂层的工程应用效果。
结论：1.热反射涂层能够使轨道板表面温度和内部温差降低11.54~21.31°C，当Ce/Si/Ti氧化物掺入量为40%~50%时，涂层降温效果较优异，能够使轨道板表面温度降低70%，温差减少40%左右，并且使轨道板竖向位移减小约70%。2.综合考虑涂层的隔热率、混凝土内部温差和涂层附着强度以及轨道板变形控制效果，Ce/Si/Ti氧化物的最优掺入量为40%，且该涂层最适合用作轨道板隔热涂层。

关键词组：轨道板；太阳辐射；隔热涂层；降温性能

Reference

[1]Al-NaghiAAA, RahmanMK, Al-AmoudiOSB, et al., 2020. Thermal performance evaluation of walls with AAC blocks, insulating plaster, and reflective coating. Journal of Energy Engineering, 146(2):04019040.

[2]AQSIQ (General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China), 2006. Paints and Varnishes‍‍—‍‍Pull-off Test for Adhesion, GB/T 5210–2006. National Standards of the People’s Republic of China(in Chinese).

[3]ASTM (American Society for Testing and Materials), 2012. Standard Specification for Friction Tape, ASTM D4514–12. ASTM, USA.

[4]ChenXH, ZhuY, CaiDG, et al., 2020. Investigation on interface damage between cement concrete base plate and asphalt concrete waterproofing layer under temperature load in ballastless track. Applied Sciences, 10(8):2654.

[5]ChenYJ, HuK, CaoSH, 2019. Thermal performance of novel multilayer cool coatings for asphalt pavements. Materials,12(12):1903.

[6]FerrariC, MuscioA, SiligardiC, et al., 2015. Design of a cool color glaze for solar reflective tile application. Ceramics International, 41(9):11106-11116.

[7]FuQH, ChenXH, CaiDG, et al., 2020. Mechanical characteristics and failure mode of asphalt concrete for ballastless track substructure based on in situ tests. Applied Sciences, 10(10):3547.

[8]GuoW, QiaoX, HuangY, et al., 2012. Study on energy saving effect of heat-reflective insulation coating on envelopes in the hot summer and cold winter zone. Energy and Buildings, 50:196-203.

[9]JelleBP, KalnæsSE, GaoT, 2015. Low-emissivity materials for building applications: a state-of-the-art review and future research perspectives. Energy and Buildings, 96:329-356.

[10]JiangHL, ZhangJW, ZhouF, et al., 2020. Optimization of PCM coating and its influence on the temperature field of CRTSII ballastless track slab. Construction and Building Materials, 236:117498.

[11]JiangL, WangLC, WangSY, 2019. A novel solar reflective coating with functional gradient multilayer structure for cooling asphalt pavements. Construction and Building Materials, 210:13-21.

[12]LevinsonR, AkbariH, ReillyJC, 2007. Cooler tile-roofed buildings with near-infrared-reflective non-white coatings. Building and Environment, 42(7):2591-2605.

[13]LiY, ChenJJ, ShiXF, et al., 2021. Thermal performance of the solar reflective fluorocarbon coating and its effects on the mechanical behavior of the ballastless track. Construction and Building Materials, 291:123260.

[14]LiuP, ZhengZH, YuZW, 2020. Cooperative work of longitudinal slab ballast-less track prestressed concrete simply supported box girder under concrete creep and a temperature gradient. Structures, 27:559-569.

[15]MalzS, KrenkelW, SteffensO, 2020. Infrared reflective wall paint in buildings: energy saving potentials and thermal comfort. Energy and Buildings, 224:110212.

[16]ParkB, KrartiM, 2016. Energy performance analysis of variable reflectivity envelope systems for commercial buildings. Energy and Buildings, 124:88-98.

[17]SaberHH, 2021. Experimental characterization of reflective coating material for cool roofs in hot, humid and dusty climate. Energy and Buildings, 242:110993.

[18]SAMR (State Administration for Market Regulation of the People’s Republic of China), 2021. General Methods for Preparation of Coating Films, GB/T 1727‍–‍2021. National Standards of the People’s Republic of China(in Chinese).

[19]SuR, LvY, SuQ, et al., 2023. Development of composite-phase change microcapsule coating and numerical investigation on its effect in ballastless track slabs. Construction and Building Materials, 375:130974.

[20]ThejusPK, KrishnapriyaKV, NishanthKG, 2021. NIR reflective, anticorrosive magenta pigment for energy saving sustainable building coatings. Solar Energy, 222:103-114.

[21]YuZW, XieY, TianXQ, 2019. Research on mechanical performance of CRTS III plate-type ballastless track structure under temperature load based on probability statistics. Advances in Civil Engineering, 2019:2975274.

[22]ZengZP, HuangZB, YinHT, et al., 2018. Influence of track line environment on the temperature field of a double-block ballastless track slab. Advances in Mechanical Engineering, 10(12):2975274.

[23]ZhangJW, JiangHL, DingF, et al., 2020. Effects of metal-ceramic anticorrosion coating on the performance of ballastless tracks at high temperature. Archives of Civil and Mechanical Engineering, 20(4):120.

[24]ZhengML, HanLL, WangF, et al., 2015. Comparison and analysis on heat reflective coating for asphalt pavement based on cooling effect and anti-skid performance. Construction and Building Materials, 93:1197-1205.

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Ce/Si/Ti氧化物热反射涂层对高速铁路轨道板温度场影响及其优化研究

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