MEASUREMENT OF REFLECTED SOLAR RADIATION OF URBAN PAVEMENT MATERIALS

Bin-Feng Yan；Soen-Han Lee

solar radiation ； Tainan City ； albedo ； ASTM E1918A

技術學刊

32卷1期（2017 / 03 / 01）

1 - 11

英文

This paper discusses the outdoor pavement materials used in cities in Taiwan and the amount of reflected solar radiation they release. The study sample was comprised of a selection of high-pressure concrete slabs, divided into white and gray types. The white samples included white flat tiles, iridescent crystal sandblasted tiles, sandblasted tiles and terrazzo tiles; and the gray samples include gray flat tiles, rustic tiles and permeable tiles, for a total of seven different types. A tool was developed in this study to aid in the screening of the sample from the external environment during the measurement process, according to the design proposed by Sailor. It was found that for the white samples, the addition of waste glass resulted in no obvious increase in the reflectance of the samples. For the iridescent crystal sandblasted tile, the reflectance of the white flat tile of the control group without any admixture was 71-82 W/m^2. However, after iridescent crystal (waste glass) was added, the reflectance of the sample was reduced by 5-6 W/m^2. It is obvious that the compressed concrete paving units without treatment had the most efficient reflectance, and that it is unnecessary for them to be mixed with any components.

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