| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
In snowy cold regions, abrasives are applied with the aim of improving a tire-road friction resistance (HFN), but they can be lost from road surface in a few hours as they are scattered by wind and passing vehicles. This study is focused on a method of spreading a mixture of heated water and sand called Hot Water Sanding (HWS) to enhance the abrasive fixation on road by making the most of the water freezing.
The objectives of this study is to optimize HWS by using HFN. To achieve these objectives, the four studies are conducted as follows: (i) Quantitative evaluation of the effects of the temperature of heated water and its mixing rate on the abrasive fixation on road. (ii) Clarification of behavioral characteristics of abrasives scattered by passing vehicles. (iii) Clarification of the relationship between the mass of abrasives remaining on road surface and HFN. (iv) Formulation and verification of an HFN estimate model (HWS-HFN model) in consideration of aspects in (ii) and (iii).
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