Over the past decade, phase change materials (PCMs) have emerged as promising solutions for thermal energy storage (TES) systems, aimed at minimizing heating and cooling energy requirements in buildings. Nevertheless, despite their potential, there are some significant challenges in effectively integrating PCMs into building components. As part of this study, lightweight aggregates (LWA) were coated with a cement slurry containing microencapsulated phase change material (MPCM) to produce lightweight concrete (LWC) with the aim of investigating its mechanical and thermal properties. The LWAs were coated with MPCM at proportions of 2.5%, 5%, and 7.5% of their weight, and an LWC-MPCM was produced using these coated aggregates. The LWC-MPCM exhibited a decrease in dry unit weight up to 1248 kg/m and a reduction in thermal conductivity up to 0.60 W/mK with negligible loss of strength. SEM examinations revealed that the cement slurry coating provided strong adhesion to the aggregates, resulting in a robust concrete-aggregate interface. The room with the LWC-MPCM experienced a decrease of approximately 0.23 °C in center temperature compared to the reference room during the daytime. Additionally, after sunset, the LWC-MPCM showed an increase of approximately 1 °C in room center temperature. These advantageous physico-mechanical and thermal properties establish LWC-MPCMs as promising and energy-efficient components for producing thermo-regulative building materials.

中文翻译：

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含微胶囊相变材料的热增强水泥浆涂层轻水瓦的物理机械性能和热监测性能

在过去的十年中，相变材料 (PCM) 已成为热能存储 (TES) 系统的有前景的解决方案，旨在最大限度地减少建筑物的供暖和制冷能源需求。然而，尽管相变材料具有潜力，但将相变材料有效集成到建筑构件中仍面临一些重大挑战。作为本研究的一部分，轻质骨料（LWA）涂有含有微胶囊相变材料（MPCM）的水泥浆，以生产轻质混凝土（LWC），目的是研究其机械和热性能。 LWA 以重量的 2.5%、5% 和 7.5% 的比例涂覆 MPCM，并使用这些涂覆的骨料生产 LWC-MPCM。 LWC-MPCM 的干单位重量降低了 1248 kg/m，导热系数降低了 0.60 W/mK，强度损失可以忽略不计。 SEM 检查表明，水泥浆涂层对骨料具有很强的粘附力，从而形成坚固的混凝土-骨料界面。白天，配备 LWC-MPCM 的房间的中心温度比参考房间降低了约 0.23 °C。此外，日落后，LWC-MPCM 显示室温增加了约 1 °C。这些有利的物理机械和热性能使 LWC-MPCM 成为生产温度调节建筑材料的有前景的节能组件。