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SALAM A back-fill material has been proposed around the basement of a building. Depth of fill is about 30'-40'. On this fill a vehicle ramp will approach the building from the road. Ramp is 36'x36'x12" designed as rigid pavement. Under the ramp, Geo-tech engineer devised CBR test and FDT for the backfill placed in 200mm layers with FD 98-100%. Is this FD achievable? For CBR my understanding is that it should be applied to the back-fill material once and same material should be used for the back-fill. FDT is applied on each layer. is it correct? Building area is near the river and flooded a year ago. Now it has been protected. Any suggestions for good back-fill material which could be used in such situations? Fill devised is attached. Regards Back fill layers thickness and gradation.docx
