I am a site inspector on a project where the contractor is presently rough grading the site. The native material is silty clay and sand.Most of the material is sand.The contractor is having a hard time passing compaction tests. He is useing a large sheeps foot packer to compact the lifts and to my eye the sheeps foot is just churning up the sand and is not compacting it.My experience is an experienced contractor just has to experiment with differant equipment and techniques to find what works for the native soil but this contractor just keeps doing the same thing over and over again with the same results. I am just trying to give him some ideas, and was wondering if anyone had experience with compacting sand on a large scale.The specifications call for 6 inch lifts--maybe with this soil he needs to place larger lifts? Maybe he needs to try differant watering techniques--I don't think he is using enough water. Maybe he needs to use differant compaction equipment? Any suggestions would be appreciated.
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