A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Reducing Erosion Along the Surface of Sloping Clay-sand Liners
In subsurface water harvesting projects clay liners need to be placed at slopes in order to direct the flow of subsurface water towards specific collection areas. Leachates in waste containment projects can also flow along sloping clay liners towards a collection pipe. Clay liners used as top dressings for road shoulders to divert water away from a highly expansive subgrade can be subjected to erosion by water flow. Untreated surfaces are expected to cause fine clay material to expand and suspend then wash away with the flow. This study is aimed at investigating the proportions of cement-clay grout spray that would be capable of reducing erosion and controlling cracks in mild to moderate slopes of clay liners. A grout material of variable cement contents was sprayed on clay-sand liner material placed on a sloping plate and water was allowed to flow under a constant head along the slope for a fixed period. The amount of material washed out from the surface was determined for 5%, 10% and 15% slopes. Several concentrations of cement were investigated and an optimum value for local Al-Qatif clay was selected. Other issues including cracking, uniformity and practicability of the approach were studied. The mechanism of the grout stabilization was discussed in view of chemical and x-ray test results.
Reducing Erosion Along the Surface of Sloping Clay-sand Liners
In subsurface water harvesting projects clay liners need to be placed at slopes in order to direct the flow of subsurface water towards specific collection areas. Leachates in waste containment projects can also flow along sloping clay liners towards a collection pipe. Clay liners used as top dressings for road shoulders to divert water away from a highly expansive subgrade can be subjected to erosion by water flow. Untreated surfaces are expected to cause fine clay material to expand and suspend then wash away with the flow. This study is aimed at investigating the proportions of cement-clay grout spray that would be capable of reducing erosion and controlling cracks in mild to moderate slopes of clay liners. A grout material of variable cement contents was sprayed on clay-sand liner material placed on a sloping plate and water was allowed to flow under a constant head along the slope for a fixed period. The amount of material washed out from the surface was determined for 5%, 10% and 15% slopes. Several concentrations of cement were investigated and an optimum value for local Al-Qatif clay was selected. Other issues including cracking, uniformity and practicability of the approach were studied. The mechanism of the grout stabilization was discussed in view of chemical and x-ray test results.
Reducing Erosion Along the Surface of Sloping Clay-sand Liners
Dafalla, Muawia A. (author) / Al-Shamrani, Mosleh A. (author) / Obaid, Ali (author)
Geo-Congress 2013 ; 2013 ; San Diego, California, United States
Geo-Congress 2013 ; 1841-1850
2013-02-25
Conference paper
Electronic Resource
English
Reducing Erosion Along the Surface of Sloping Clay-Sand Liners
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