UV Irradiation Degradation Control of Sand Stabilized with Containing Organic Slurry Hydrophilic Polyurethane

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  • 親水性ポリウレタン樹脂を用いた有機系スラリーによる浸透固化処理砂の紫外線分解制御
  • シンスイセイ ポリウレタン ジュシ オ モチイタ ユウキケイ スラリー ニ ヨル シントウコカ ショリ ズナ ノ シガイセン ブンカイ セイギョ

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Abstract

Slurry scattering technique has been widely accepted to fix moving sand. By using organic slurry that has high water retention capacity, it seems that the vegetation on the desert may be realized. However, the organic material in the slurry, for example hydrophilic polyurethane, is easily decomposed by UV irradiation. In addition, the strength of UV ray is extremely strong on the desert. In this study, we found that the UV resistance of organic slurry can be effectively controlled through using a decomposition control agent. The decomposed products are nontoxic and environmentally friendly. By mixing Hindered Amine Light Stabilizer (HALS) as a decomposition control agent in the slurry with the ratio of 0.015%, 0.5∼0.7%, and 1.0%, the mass loss due to the ultrasonic irradiation was decreased to less than 20% of the mass of stabilized soil with only organic slurry, 4%.

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