Environmental conciderations concerning anit-icing / deicing agent application Suzuki, Shunici ; Kubo, Ryushi ; Yoshie, Seigo
Language: English Language: French Series: ; topic IV-165Publication details: XIth international winter road congress 2002. Sapporo [Japan] / XIe congres international de la viabilite hivernale 2002, Sapporo [Japon]. Paper, 2002Description: 9 sSubject(s): Bibl.nr: VTI 2002.0071Location: Abstract: Concerning JH's efforts to dispersion the environmental impact of deicing salt application, this paper has reported the following: (1) As for methods of measuring the quantity of salt that is blown up and falls to the ground, the container method, which uses sampling containers installed at low heights, and the gutter method are useful for slopes close to road shoulders, and the funnel method is useful at locations 10 m or more away from the shoulder of the road outside the right-of-way. The quantity of salt that is transported over distance of 10 m or more from the shoulder of the road is almost nil; (2) The gauze method, which uses vertically oriented pieces of gauze, is suitable for the measurement of the quantity of air-borne salt. Care should be taken if there are fruit trees, buildings and the like facing the expressway and directly exposed to winds because the amount of air-borne salt at a distance of 40 m from the shoulder of the road does not differ significantly from that at a distance of 70 m; (3) The newly introduced "wet salting" method has reduced salt usage by 20 to 30 per cent, thereby reducing the quantity of salt blown away from the roadway; (4) Compared with dense asphalt pavement, porous asphalt pavement reduces the amount of salt blown away by half. Porous asphalt pavement, therefore, can also be used as an effective means of salt dispersion control; and (5) Shielding devices such as net fences and noise barriers can be used to reduce air-borne salt dispersion below the height of their installations. In areas where air-borne salt migration needs to be controlled, therefore, net fences are erected to reduce adverse environmental effects.Current library | Call number | Status | Date due | Barcode | |
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Statens väg- och transportforskningsinstitut | Available |
Concerning JH's efforts to dispersion the environmental impact of deicing salt application, this paper has reported the following: (1) As for methods of measuring the quantity of salt that is blown up and falls to the ground, the container method, which uses sampling containers installed at low heights, and the gutter method are useful for slopes close to road shoulders, and the funnel method is useful at locations 10 m or more away from the shoulder of the road outside the right-of-way. The quantity of salt that is transported over distance of 10 m or more from the shoulder of the road is almost nil; (2) The gauze method, which uses vertically oriented pieces of gauze, is suitable for the measurement of the quantity of air-borne salt. Care should be taken if there are fruit trees, buildings and the like facing the expressway and directly exposed to winds because the amount of air-borne salt at a distance of 40 m from the shoulder of the road does not differ significantly from that at a distance of 70 m; (3) The newly introduced "wet salting" method has reduced salt usage by 20 to 30 per cent, thereby reducing the quantity of salt blown away from the roadway; (4) Compared with dense asphalt pavement, porous asphalt pavement reduces the amount of salt blown away by half. Porous asphalt pavement, therefore, can also be used as an effective means of salt dispersion control; and (5) Shielding devices such as net fences and noise barriers can be used to reduce air-borne salt dispersion below the height of their installations. In areas where air-borne salt migration needs to be controlled, therefore, net fences are erected to reduce adverse environmental effects.