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Impact of fine materials content on the transport of dust suppressants in gravel road wearing courses
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- Edvardsson, Karin (author)
- Högskolan Dalarna,KTH,Väg- och banteknik,Byggteknik
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- Magnusson, Rolf (author)
- Högskolan Dalarna,Vägteknik
- (creator_code:org_t)
- 2011
- 2011
- English.
- In: Journal of materials in civil engineering. - 0899-1561 .- 1943-5533. ; 23:8, s. 1163-1170
- Journal article (peer-reviewed)
Abstract
Subject headings
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- A significant problem when dust-suppressing agents are used on gravel roads is that they tend to leach during rainfall. The purpose of this study is to illustrate this problem by using laboratory studies and studies in situ. Both capillary rise and leaching of suppressants were examined by using cylinders filled with wearing course material. Chloride was more prone than lignosulphonate to transport upwards by means of capillary rise, and therefore, it showed a more effective performance over a longer period of time. Optimal percentages of fine material for minimal lignosulphonate and chloride leaching were found to be 15% by weight and 10-15% by weight, respectively. Ions of calcium chloride seemed to flocculate clay particles, which probably prevents them from leaching. To study the in situ longevity of fine material in general, calcium carbonate, mesa, was used as a marker. The fine material in gravel wearing courses must be replenished regularly. Mesa loss was up to 80% after 1 year.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Farkostteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Vehicle Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering (hsv//eng)
Keyword
- Gravel roads
- Dust suppressants
- Vertical transportation
- Leaching
- Fine material content
- Complex Systems – Microdata Analysis
Publication and Content Type
- ref (subject category)
- art (subject category)
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