Use of cement to reduce erosion of the slopes of mine tailings dams

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dc.contributor.author Rankhododo, Nkhanedzeni Ernest
dc.date.accessioned 2008-12-22T09:46:27Z
dc.date.available 2008-12-22T09:46:27Z
dc.date.issued 2008-12-22T09:46:27Z
dc.identifier.uri http://hdl.handle.net/10539/5903
dc.description.abstract Erosion on the slopes of mine tailings represents one of the most important environmental problems arising from the disposal of mine tailings. Tailings dam erosion is the main source of pollution that contaminates agricultural land and streams around mining areas. There is an urgent need to reduce erosion of the slopes of mine tailings in-order to limit further devastation of natural ecology. The present study investigates the possible use of cement to reduce erosion of the slopes of mine tailings dams. The pinhole erosion test was used to measure erodibility of tailings stabilized with cement. The strength properties of cement-stabilized tailings have been evaluated by the unconfined compression test. Conbex and ordinary Portland cement have been used for tailings stabilization, with contents of 0, 3, 5, 7, and 10% by mass. It has been established that cement can be used to reduce erosion of the slopes of mine tailings dams. At least 3% by mass cement is required to produce zero erosion loss. The resistance of tailings to erosion can be enhanced by increasing compaction density, curing period and cement content. Ordinary Portland cement produced higher strengths and erosion resistance than Conbex, although Conbex may be useful for stabilizing fine tailings. Cement-stabilized tailings could be used to make bricks and rubble for use in reducing erosion of the slopes of mine tailings dams. As little as 10% of cement is necessary to produce unconfined compressive strengths of 1600- 2600 kPa. en
dc.language.iso en en
dc.subject cement en
dc.subject mine tailings en
dc.subject Erosion en
dc.subject slopes en
dc.subject pollution en
dc.title Use of cement to reduce erosion of the slopes of mine tailings dams en
dc.type Thesis en


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