MATERIALS USED IN ROAD CONSTRUCTION IN UPPER VOLTA: AN UNCONVENTIONAL MATERIAL: THE "LITHOSTAB"
Lateritic gravels, which can be found in nearly all regions, have variable geotechnic characteristics which make them of dubious value for highway construction in certain areas. For sub-base use, they have been successfully stabilized by the addition of cement. Upper Volta is not a cement producing country and is therefore completely dependent on imports. An alternative use of weathered rock has been successful in the Northern region of the country, but it is impractical to export it to other areas. The author describes one particular solution, still under test, where crushed granite is improved by adding a proportion of 30 percent lateritic gravels. This is an intermediate solution between natural lateritic gravels and crushed granite stones. Road sections with sub-bases constructed in this manner are still usable after two seasons of rain. The aim of such an operation is to reinforce the composition of lateritic gravels and to obtain a better durability of the sub-base layers. (IRF)
- Presented at the Fourth IRF African Highway Conference, Nairobi, Kenya, January 20-25, 1980. For individual papers see TRIS Accession Numbers 311921 through 311971.
Washington, DC USA 20024
- Lompo, P
- Publication Date: 1980
- Features: Figures; Photos; Tables;
- Pagination: 38 p.
- TRT Terms: Building materials; Crushed rock; Developing countries; Granite; Lateritic gravels; Road construction; Soil stabilization; Subgrade (Pavements)
- Old TRIS Terms: Subgrade treatments
- Subject Areas: Geotechnology; Highways; Pavements;
- Accession Number: 00311930
- Record Type: Publication
- Report/Paper Numbers: Conf Paper
- Files: TRIS
- Created Date: Jun 9 1980 12:00AM