footing bases in sandy soils 2

[1610]

I am currenly writing a site investigation assigment and I was wondering wether anybody had any recommendations for the preparation of footing bases in sandy soils. Any help would be greatly appreciated.

 

[KAM_imported]

If the sands are relatively clean (less than 15% fines), I would recommend that you compact the upper 12 inches of bearing soils to 95% ASTM D1557 (Modified Proctor) density. Perform density tests to confirm acceptable compaction. Dewater prior to compacting the soil, if necessary. If the soils possess more than about 15% fines (but less than 25 to 30%), use a Standard Proctor compaction criteria (ASTM D698) instead.