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IJSTR >> Volume 7 - Issue 11, November 2018 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Behavior Of Concrete Slab Supported By A Voided Sandy Soil

[Full Text]



Muhammed Abed Attiya, Laith Jawad Aziz, Ola Mazen Mekki



concrete slab, voided soil, numerical model, ANSYS simulation, case study, sandy soil, gypsum dissolution.



Slab supported by a soil media is a widely used form of constructions in the civil engineering. When a cavity forms -due to gypsum dissolution- below the slab, a loss of support case or weak supporting condition will occur. In this paper, an experimental model has been tested in the laboratory to discus the load deflection curve of a real case of slab on soil. A good agreement obtained when simulating the experimental result by a numerical analysis program (ANSYS). Parametric studies have been made to show the effect of forming a cavity of different depths, various diameters, changing the slab thickness, and variation the concrete compressive strength. From this research, it can be concluded that forming a cavity of (D/T) = 0.13 (cavity depth to total depth of soil) causes to reduce the slab capacity by (148%) when comparing with a soil without cavity, and using a cavity of (d/B) =1 (cavity diameter to slab width) leads to reduce the slab failure load by (212.5%) when comparing with a soil without cavity. The failure load versus cavity depth and diameter has been obtained. The concrete compressive strength vs failure load of slab has been drawn.



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