Application of Glass Beads in Building Exterior Wall Surface Materials

J. Yuan
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引用次数: 2

Abstract

Glass beads are solid glass spheres. Because of their high strength, chemical stability, low thermal expansion, and good flowability, they are manufactured from colorless glass for many industrial purposes. In recent years, the urban heat island (UHI) phenomenon has become very serious in urban centers. Heat emitted from exterior walls of buildings accounts for a relatively large proportion of total anthropogenic waste heat. Retroreflective (RR) materials are researched worldwide for the potential in application to building exterior wall surface instead of normal diffuse highly reflective (DHR) materials to resist the UHI. Glass beads are the common main components of these RR materials. Glass beads have different refractive indices and diameters. The classification and reflection principles of glass beads, experimental analysis on the optical properties and thermal performance of glass bead RR materials are elaborated in detail in this chapter. In addition, if these glass bead RR materials are used in building facades, when the incident angle of the sun is very high, the facade will produce a large specular reflection to the road, which may cause adverse effects on pedestrians. Therefore, theoretical and technical aspects of preventing the specular reflection from glass bead RR materials should be studied and implemented.
玻璃微珠在建筑外墙表面材料中的应用
玻璃珠是固体玻璃球。由于它们的高强度、化学稳定性、低热膨胀和良好的流动性,它们是由无色玻璃制成的,用于许多工业用途。近年来,城市中心地区的城市热岛现象日益严重。建筑外墙散发的热量在人为废热总量中占比较大的比例。在世界范围内,人们都在研究逆反射材料(RR)代替普通漫反射材料(DHR)在建筑外墙表面的应用潜力。玻璃珠是这些RR材料的常见主要成分。玻璃珠具有不同的折射率和直径。本章详细阐述了玻璃微珠的分类和反射原理,并对玻璃微珠RR材料的光学性能和热性能进行了实验分析。此外,如果在建筑立面中使用这些玻璃珠RR材料,当太阳的入射角很高时,立面会对道路产生较大的镜面反射,可能会对行人造成不利影响。因此,防止玻璃珠RR材料镜面反射的理论和技术方面需要进行研究和实现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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