期刊
CANADIAN JOURNAL OF CIVIL ENGINEERING
卷 41, 期 11, 页码 955-963出版社
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/cjce-2014-0030
关键词
unpaved roads stabilization; forest road; spring thaw; biofuel ash; field; bearing capacity; recycling
资金
- European Union Regional Development Fund
- Swedish Forest Agency
- County Administrative Board of Vasternorrland and Jamtland
- Swedish Geotechnical Institute
- Swedish Transport Administration
- Skogsagarna Norrskog
Increased temperatures and rainfalls will give more settlements and less bearing capacity in gravel roads, which will have implications for the forestry. Pulp mill fly ash without additives was used for stabilizing the road base of a low-volume gravel road. A two-year monitoring of the road was conducted, including measurements of achieved ash content, density, water infiltration capacity, and load bearing capacity. The results showed that the ash-stabilized sections performed better than conventionally upgraded sections and also achieved increased bearing capacity over time. Hydration of the fly ash increased the stiffness and decreased the permeability of the road base. The differences were more pronounced during spring thaw. Best performance was achieved in the section with thicker ash stabilized layer.
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